XANAX®
alprazolam tablets, USP
CIV
WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS
Concomitant use of benzodiazepines and opioids may result in profound sedation,
respiratory depression, coma, and death [see Warnings, Drug Interactions].
Reserve concomitant prescribing of these drugs for use in patients for whom
alternative treatment options are inadequate.
Limit dosages and durations to the minimum required.
Follow patients for signs and symptoms of respiratory depression and sedation.
DESCRIPTION
XANAX Tablets contain alprazolam which is a triazolo analog of the 1,4 benzodiazepine
class of central nervous system-active compounds.
The chemical name of alprazolam is 8-Chloro-1-methyl-6-phenyl-4H-s-triazolo [4,3-α] [1,4]
benzodiazepine.
The structural formula is represented to the right:
Alprazolam is a white crystalline powder, which is soluble in methanol or ethanol but which
has no appreciable solubility in water at physiological pH.
Each XANAX Tablet, for oral administration, contains 0.25, 0.5, 1 or 2 mg of alprazolam.
XANAX Tablets, 2 mg, are multi-scored and may be divided as shown below:
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Inactive ingredients: Cellulose, corn starch, docusate sodium, lactose, magnesium stearate,
silicon dioxide and sodium benzoate. In addition, the 0.5 mg tablet contains FD&C Yellow
No. 6 and the 1 mg tablet contains FD&C Blue No. 2.
CLINICAL PHARMACOLOGY
Pharmacodynamics
CNS agents of the 1,4 benzodiazepine class presumably exert their effects by binding at stereo
specific receptors at several sites within the central nervous system. Their exact mechanism of
action is unknown. Clinically, all benzodiazepines cause a dose-related central nervous
system depressant activity varying from mild impairment of task performance to hypnosis.
Pharmacokinetics
Absorption
Following oral administration, alprazolam is readily absorbed. Peak concentrations in the
plasma occur in 1 to 2 hours following administration. Plasma levels are proportionate to the
dose given; over the dose range of 0.5 to 3.0 mg, peak levels of 8.0 to 37 ng/mL were
observed. Using a specific assay methodology, the mean plasma elimination half-life of
alprazolam has been found to be about 11.2 hours (range: 6.3-26.9 hours) in healthy adults.
Distribution
In vitro, alprazolam is bound (80 percent) to human serum protein. Serum albumin accounts
for the majority of the binding.
Metabolism/Elimination
Alprazolam is extensively metabolized in humans, primarily by cytochrome P450 3A4
(CYP3A4), to two major metabolites in the plasma: 4-hydroxyalprazolam and α-
hydroxyalprazolam. A benzophenone derived from alprazolam is also found in humans.
Their half-lives appear to be similar to that of alprazolam. The plasma concentrations of 4-
hydroxyalprazolam and -hydroxyalprazolam relative to unchanged alprazolam concentration
were always less than 4%. The reported relative potencies in benzodiazepine receptor binding
experiments and in animal models of induced seizure inhibition are 0.20 and 0.66,
respectively, for 4-hydroxyalprazolam and -hydroxyalprazolam. Such low concentrations
and the lesser potencies of 4-hydroxyalprazolam and -hydroxyalprazolam suggest that they
are unlikely to contribute much to the pharmacological effects of alprazolam. The
benzophenone metabolite is essentially inactive.
Alprazolam and its metabolites are excreted primarily in the urine.
Special Populations
Changes in the absorption, distribution, metabolism and excretion of benzodiazepines have
been reported in a variety of disease states including alcoholism, impaired hepatic function
and impaired renal function. Changes have also been demonstrated in geriatric patients. A
mean half-life of alprazolam of 16.3 hours has been observed in healthy elderly subjects
(range: 9.0-26.9 hours, n=16) compared to 11.0 hours (range: 6.3-15.8 hours, n=16) in healthy
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adult subjects. In patients with alcoholic liver disease the half-life of alprazolam ranged
between 5.8 and 65.3 hours (mean: 19.7 hours, n=17) as compared to between 6.3 and 26.9
hours (mean=11.4 hours, n=17) in healthy subjects. In an obese group of subjects the half-life
of alprazolam ranged between 9.9 and 40.4 hours (mean=21.8 hours, n=12) as compared to
between 6.3 and 15.8 hours (mean=10.6 hours, n=12) in healthy subjects.
Because of its similarity to other benzodiazepines, it is assumed that alprazolam undergoes
transplacental passage and that it is excreted in human milk.
Race — Maximal concentrations and half-life of alprazolam are approximately 15% and 25%
higher in Asians compared to Caucasians.
Pediatrics — The pharmacokinetics of alprazolam in pediatric patients have not been studied.
Gender — Gender has no effect on the pharmacokinetics of alprazolam.
Cigarette Smoking — Alprazolam concentrations may be reduced by up to 50% in smokers
compared to non-smokers.
Drug-Drug Interactions
Alprazolam is primarily eliminated by metabolism via cytochrome P450 3A (CYP3A). Most
of the interactions that have been documented with alprazolam are with drugs that inhibit or
induce CYP3A4.
Compounds that are potent inhibitors of CYP3A would be expected to increase plasma
alprazolam concentrations. Drug products that have been studied in vivo, along with their
effect on increasing alprazolam AUC, are as follows: ketoconazole, 3.98 fold; itraconazole,
2.70 fold; nefazodone, 1.98 fold; fluvoxamine, 1.96 fold; and erythromycin, 1.61 fold (see
CONTRAINDICATIONS, WARNINGS, and PRECAUTIONS–Drug Interactions).
CYP3A inducers would be expected to decrease alprazolam concentrations and this has been
observed in vivo. The oral clearance of alprazolam (given in a 0.8 mg single dose) was
increased from 0.90±0.21 mL/min/kg to 2.13±0.54 mL/min/kg and the elimination t
1/2
was
shortened (from 17.14.9 to 7.7 1.7 h) following administration of 300 mg/day
carbamazepine for 10 days (see PRECAUTIONS–Drug Interactions). However, the
carbamazepine dose used in this study was fairly low compared to the recommended doses
(1000-1200 mg/day); the effect at usual carbamazepine doses is unknown.
The ability of alprazolam to induce human hepatic enzyme systems has not yet been
determined. However, this is not a property of benzodiazepines in general. Further,
alprazolam did not affect the prothrombin or plasma warfarin levels in male volunteers
administered sodium warfarin orally.
CLINICAL STUDIES
Anxiety Disorders
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XANAX Tablets were compared to placebo in double blind clinical studies (doses up to 4
mg/day) in patients with a diagnosis of anxiety or anxiety with associated depressive
symptomatology. XANAX was significantly better than placebo at each of the evaluation
periods of these 4-week studies as judged by the following psychometric instruments:
Physician’s Global Impressions, Hamilton Anxiety Rating Scale, Target Symptoms, Patient’s
Global Impressions and Self-Rating Symptom Scale.
Panic Disorder
Support for the effectiveness of XANAX in the treatment of panic disorder came from three
short-term, placebo-controlled studies (up to 10 weeks) in patients with diagnoses closely
corresponding to DSM-III-R criteria for panic disorder.
The average dose of XANAX was 5-6 mg/day in two of the studies, and the doses of XANAX
were fixed at 2 and 6 mg/day in the third study. In all three studies, XANAX was superior to
placebo on a variable defined as "the number of patients with zero panic attacks" (range, 37-
83% met this criterion), as well as on a global improvement score. In two of the three studies,
XANAX was superior to placebo on a variable defined as "change from baseline on the
number of panic attacks per week" (range, 3.3-5.2), and also on a phobia rating scale. A
subgroup of patients who were improved on XANAX during short-term treatment in one of
these trials was continued on an open basis up to 8 months, without apparent loss of benefit.
INDICATIONS AND USAGE
Anxiety Disorders
XANAX Tablets (alprazolam) are indicated for the management of anxiety disorder (a
condition corresponding most closely to the APA Diagnostic and Statistical Manual [DSM-
III-R] diagnosis of generalized anxiety disorder) or the short-term relief of symptoms of
anxiety. Anxiety or tension associated with the stress of everyday life usually does not require
treatment with an anxiolytic.
Generalized anxiety disorder is characterized by unrealistic or excessive anxiety and worry
(apprehensive expectation) about two or more life circumstances, for a period of 6 months or
longer, during which the person has been bothered more days than not by these concerns. At
least 6 of the following 18 symptoms are often present in these patients: Motor Tension
(trembling, twitching, or feeling shaky; muscle tension, aches, or soreness; restlessness; easy
fatigability); Autonomic Hyperactivity (shortness of breath or smothering sensations;
palpitations or accelerated heart rate; sweating, or cold clammy hands; dry mouth; dizziness
or light-headedness; nausea, diarrhea, or other abdominal distress; flushes or chills; frequent
urination; trouble swallowing or 'lump in throat’); Vigilance and Scanning (feeling keyed up
or on edge; exaggerated startle response; difficulty concentrating or 'mind going blank’
because of anxiety; trouble falling or staying asleep; irritability). These symptoms must not be
secondary to another psychiatric disorder or caused by some organic factor.
Anxiety associated with depression is responsive to XANAX.
Panic Disorder
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XANAX is also indicated for the treatment of panic disorder, with or without agoraphobia.
Studies supporting this claim were conducted in patients whose diagnoses corresponded
closely to the DSM-III-R/IV criteria for panic disorder (see CLINICAL STUDIES).
Panic disorder (DSM-IV) is characterized by recurrent unexpected panic attacks, ie, a discrete
period of intense fear or discomfort in which four (or more) of the following symptoms
develop abruptly and reach a peak within 10 minutes: (1) palpitations, pounding heart, or
accelerated heart rate; (2) sweating; (3) trembling or shaking; (4) sensations of shortness of
breath or smothering; (5) feeling of choking; (6) chest pain or discomfort; (7) nausea or
abdominal distress; (8) feeling dizzy, unsteady, lightheaded, or faint; (9) derealization
(feelings of unreality) or depersonalization (being detached from oneself); (10) fear of losing
control; (11) fear of dying; (12) paresthesias (numbness or tingling sensations); (13) chills or
hot flushes.
Demonstrations of the effectiveness of XANAX by systematic clinical study are limited to 4
months duration for anxiety disorder and 4 to 10 weeks duration for panic disorder; however,
patients with panic disorder have been treated on an open basis for up to 8 months without
apparent loss of benefit. The physician should periodically reassess the usefulness of the drug
for the individual patient.
CONTRAINDICATIONS
XANAX Tablets are contraindicated in patients with known sensitivity to this drug or other
benzodiazepines.
XANAX is contraindicated with ketoconazole and itraconazole, since these medications
significantly impair the oxidative metabolism mediated by cytochrome P450 3A (CYP3A)
(see WARNINGS and PRECAUTIONS–Drug Interactions).
WARNINGS
Risks from Concomitant Use with Opioids
Concomitant use of benzodiazepines, including XANAX, and opioids may result in
profound sedation, respiratory depression, coma, and death. Because of these risks, reserve
concomitant prescribing of these drugs for use in patients for whom alternative treatment
options are inadequate.
Observational studies have demonstrated that concomitant use of opioid analgesics and
benzodiazepines increases the risk of drug-related mortality compared to use of opioids
alone. If a decision is made to prescribe XANAX concomitantly with opioids, prescribe the
lowest effective dosages and minimum durations of concomitant use, and follow patients
closely for signs and symptoms of respiratory depression and sedation. In patients already
receiving an opioid analgesic, prescribe a lower initial dose of XANAX than indicated in the
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In two controlled trials of 6 to 8 weeks duration where the ability of patients to discontinue
medication was measured, 71%-93% of patients treated with XANAX tapered completely off
therapy compared to 89%-96% of placebo-treated patients. In a controlled postmarketing
discontinuation study of panic disorder patients, the duration of treatment (3 months
compared to 6 months) had no effect on the ability of patients to taper to zero dose.
Seizures attributable to XANAX were seen after drug discontinuance or dose reduction in 8 of
1980 patients with panic disorder or in patients participating in clinical trials where doses of
XANAX greater than 4 mg/day for over 3 months were permitted. Five of these cases clearly
occurred during abrupt dose reduction, or discontinuation from daily doses of 2 to 10 mg.
Three cases occurred in situations where there was not a clear relationship to abrupt dose
reduction or discontinuation. In one instance, seizure occurred after discontinuation from a
single dose of 1 mg after tapering at a rate of 1 mg every 3 days from 6 mg daily. In two other
instances, the relationship to taper is indeterminate; in both of these cases the patients had
been receiving doses of 3 mg daily prior to seizure. The duration of use in the above 8 cases
ranged from 4 to 22 weeks. There have been occasional voluntary reports of patients
developing seizures while apparently tapering gradually from XANAX. The risk of seizure
seems to be greatest 24-72 hours after discontinuation (see DOSAGE AND
ADMINISTRATION for recommended tapering and discontinuation schedule).
Status Epilepticus and its Treatment
The medical event voluntary reporting system shows that withdrawal seizures have been
reported in association with the discontinuation of XANAX. In most cases, only a single
seizure was reported; however, multiple seizures and status epilepticus were reported as well.
Interdose Symptoms
Early morning anxiety and emergence of anxiety symptoms between doses of XANAX have
been reported in patients with panic disorder taking prescribed maintenance doses of
XANAX. These symptoms may reflect the development of tolerance or a time interval
between doses which is longer than the duration of clinical action of the administered dose. In
either case, it is presumed that the prescribed dose is not sufficient to maintain plasma levels
above those needed to prevent relapse, rebound or withdrawal symptoms over the entire
course of the interdosing interval. In these situations, it is recommended that the same total
daily dose be given divided as more frequent administrations (see DOSAGE AND
ADMINISTRATION).
Risk of Dose Reduction
Withdrawal reactions may occur when dosage reduction occurs for any reason. This includes
purposeful tapering, but also inadvertent reduction of dose (eg, the patient forgets, the patient
is admitted to a hospital). Therefore, the dosage of XANAX should be reduced or
discontinued gradually (see DOSAGE AND ADMINISTRATION).
CNS Depression and Impaired Performance
Because of its CNS depressant effects, patients receiving XANAX should be cautioned
against engaging in hazardous occupations or activities requiring complete mental alertness
such as operating machinery or driving a motor vehicle. For the same reason, patients should
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be cautioned about the simultaneous ingestion of alcohol and other CNS depressant drugs
during treatment with XANAX.
Risk of Fetal Harm
Benzodiazepines can potentially cause fetal harm when administered to pregnant women. If
XANAX is used during pregnancy, or if the patient becomes pregnant while taking this drug,
the patient should be apprised of the potential hazard to the fetus. Because of experience with
other members of the benzodiazepine class, XANAX is assumed to be capable of causing an
increased risk of congenital abnormalities when administered to a pregnant woman during the
first trimester. Because use of these drugs is rarely a matter of urgency, their use during the
first trimester should almost always be avoided. The possibility that a woman of childbearing
potential may be pregnant at the time of institution of therapy should be considered. Patients
should be advised that if they become pregnant during therapy or intend to become pregnant
they should communicate with their physicians about the desirability of discontinuing the
drug.
Alprazolam Interaction with Drugs that Inhibit Metabolism via Cytochrome P4503A
The initial step in alprazolam metabolism is hydroxylation catalyzed by cytochrome P450 3A
(CYP3A). Drugs that inhibit this metabolic pathway may have a profound effect on the
clearance of alprazolam. Consequently, alprazolam should be avoided in patients receiving
very potent inhibitors of CYP3A. With drugs inhibiting CYP3A to a lesser but still significant
degree, alprazolam should be used only with caution and consideration of appropriate dosage
reduction. For some drugs, an interaction with alprazolam has been quantified with clinical
data; for other drugs, interactions are predicted from in vitro data and/or experience with
similar drugs in the same pharmacologic class.
The following are examples of drugs known to inhibit the metabolism of alprazolam and/or
related benzodiazepines, presumably through inhibition of CYP3A.
Potent CYP3A Inhibitors
Azole antifungal agents— Ketoconazole and itraconazole are potent CYP3A inhibitors and
have been shown in vivo to increase plasma alprazolam concentrations 3.98 fold and 2.70
fold, respectively. The coadministration of alprazolam with these agents is not recommended.
Other azole-type antifungal agents should also be considered potent CYP3A inhibitors and the
coadministration of alprazolam with them is not recommended (see
CONTRAINDICATIONS).
Drugs demonstrated to be CYP 3A inhibitors on the basis of clinical studies involving
alprazolam (caution and consideration of appropriate alprazolam dose reduction are
recommended during coadministration with the following drugs)
Nefazodone—Coadministration of nefazodone increased alprazolam concentration two-fold.
Fluvoxamine—Coadministration of fluvoxamine approximately doubled the maximum
plasma concentration of alprazolam, decreased clearance by 49%, increased half-life by 71%,
and decreased measured psychomotor performance.
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Cimetidine—Coadministration of cimetidine increased the maximum plasma concentration of
alprazolam by 86%, decreased clearance by 42%, and increased half-life by 16%.
Other drugs possibly affecting alprazolam metabolism
Other drugs possibly affecting alprazolam metabolism by inhibition of CYP3A are discussed
in the PRECAUTIONS section (see PRECAUTIONS–Drug Interactions).
PRECAUTIONS
General
Suicide
As with other psychotropic medications, the usual precautions with respect to administration
of the drug and size of the prescription are indicated for severely depressed patients or those
in whom there is reason to expect concealed suicidal ideation or plans. Panic disorder has
been associated with primary and secondary major depressive disorders and increased reports
of suicide among untreated patients.
Mania
Episodes of hypomania and mania have been reported in association with the use of XANAX
in patients with depression.
Uricosuric Effect
Alprazolam has a weak uricosuric effect. Although other medications with weak uricosuric
effect have been reported to cause acute renal failure, there have been no reported instances of
acute renal failure attributable to therapy with XANAX.
Use in Patients with Concomitant Illness
It is recommended that the dosage be limited to the smallest effective dose to preclude the
development of ataxia or oversedation which may be a particular problem in elderly or
debilitated patients. (See DOSAGE AND ADMINISTRATION.) The usual precautions in
treating patients with impaired renal, hepatic or pulmonary function should be observed.
There have been rare reports of death in patients with severe pulmonary disease shortly after
the initiation of treatment with XANAX. A decreased systemic alprazolam elimination rate
(eg, increased plasma half-life) has been observed in both alcoholic liver disease patients and
obese patients receiving XANAX (see CLINICAL PHARMACOLOGY).
Information for Patients
For all users of XANAX:
To assure safe and effective use of benzodiazepines, all patients prescribed XANAX should
be provided with the following guidance.
1. Advise both patients and caregivers about the risks of potentially fatal respiratory
depression and sedation when XANAX is used with opioids and not to use such drugs
concomitantly unless supervised by a health care provider.
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2. Advise patients not to drive or operate heavy machinery until the effects of concomitant
use with the opioid have been determined [see Drug Interactions].
3. Inform your physician about any alcohol consumption and medicine you are taking now,
including medication you may buy without a prescription. Alcohol should generally not be
used during treatment with benzodiazepines.
4. Not recommended for use in pregnancy. Therefore, inform your physician if you are
pregnant, if you are planning to have a child, or if you become pregnant while you are taking
this medication.
5. Inform your physician if you are nursing.
6. Until you experience how this medication affects you, do not drive a car or operate
potentially dangerous machinery, etc.
7. Do not increase the dose even if you think the medication "does not work anymore"
without consulting your physician. Benzodiazepines, even when used as recommended, may
produce emotional and/or physical dependence.
8. Do not stop taking this medication abruptly or decrease the dose without consulting your
physician, since withdrawal symptoms can occur.
Additional advice for panic disorder patients:
The use of XANAX at doses greater than 4 mg/day, often necessary to treat panic disorder, is
accompanied by risks that you need to carefully consider. When used at doses greater than 4
mg/day, which may or may not be required for your treatment, XANAX has the potential to
cause severe emotional and physical dependence in some patients and these patients may find
it exceedingly difficult to terminate treatment. In two controlled trials of 6 to 8 weeks duration
where the ability of patients to discontinue medication was measured, 7 to 29% of patients
treated with XANAX did not completely taper off therapy. In a controlled postmarketing
discontinuation study of panic disorder patients, the patients treated with doses of XANAX
greater than 4 mg/day had more difficulty tapering to zero dose than patients treated with less
than 4 mg/day. In all cases, it is important that your physician help you discontinue this
medication in a careful and safe manner to avoid overly extended use of XANAX.
In addition, the extended use at doses greater than 4 mg/day appears to increase the incidence
and severity of withdrawal reactions when XANAX is discontinued. These are generally
minor but seizure can occur, especially if you reduce the dose too rapidly or discontinue the
medication abruptly. Seizure can be life-threatening.
Laboratory Tests
Laboratory tests are not ordinarily required in otherwise healthy patients. However, when
treatment is protracted, periodic blood counts, urinalysis, and blood chemistry analyses are
advisable in keeping with good medical practice.
Drug Interactions
Use with Opioids
The concomitant use of benzodiazepines and opioids increases the risk of respiratory
depression because of actions at different receptor sites in the CNS that control respiration.
Benzodiazepines interact at GABA
A
sites and opioids interact primarily at mu receptors.
When benzodiazepines and opioids are combined, the potential for benzodiazepines to
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significantly worsen opioid-related respiratory depression exists. Limit dosage and duration of
concomitant use of benzodiazepines and opioids, and monitor patients closely for respiratory
depression and sedation.
Use with Other CNS Depressants
If XANAX Tablets are to be combined with other psychotropic agents or anticonvulsant
drugs, careful consideration should be given to the pharmacology of the agents to be
employed, particularly with compounds which might potentiate the action of benzodiazepines.
The benzodiazepines, including alprazolam, produce additive CNS depressant effects when
co-administered with other psychotropic medications, anticonvulsants, antihistaminics,
ethanol and other drugs which themselves produce CNS depression.
Use with Imipramine and Desipramine
The steady state plasma concentrations of imipramine and desipramine have been reported to
be increased an average of 31% and 20%, respectively, by the concomitant administration of
XANAX Tablets in doses up to 4 mg/day. The clinical significance of these changes is
unknown.
Drugs that inhibit alprazolam metabolism via cytochrome P450 3A
The initial step in alprazolam metabolism is hydroxylation catalyzed by cytochrome P450 3A
(CYP3A). Drugs which inhibit this metabolic pathway may have a profound effect on the
clearance of alprazolam (see CONTRAINDICATIONS and WARNINGS for additional drugs
of this type).
Drugs demonstrated to be CYP3A inhibitors of possible clinical significance on the basis of
clinical studies involving alprazolam (caution is recommended during coadministration with
alprazolam)
Fluoxetine—Coadministration of fluoxetine with alprazolam increased the maximum plasma
concentration of alprazolam by 46%, decreased clearance by 21%, increased half-life by 17%,
and decreased measured psychomotor performance.
Propoxyphene—Coadministration of propoxyphene decreased the maximum plasma
concentration of alprazolam by 6%, decreased clearance by 38%, and increased half-life by
58%.
Oral Contraceptives—Coadministration of oral contraceptives increased the maximum plasma
concentration of alprazolam by 18%, decreased clearance by 22%, and increased half-life by
29%.
Drugs and other substances demonstrated to be CYP 3A inhibitors on the basis of clinical
studies involving benzodiazepines metabolized similarly to alprazolam or on the basis of in
vitro studies with alprazolam or other benzodiazepines (caution is recommended during
coadministration with alprazolam)
Available data from clinical studies of benzodiazepines other than alprazolam suggest a
possible drug interaction with alprazolam for the following: diltiazem, isoniazid, macrolide
antibiotics such as erythromycin and clarithromycin, and grapefruit juice. Data from in vitro
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studies of alprazolam suggest a possible drug interaction with alprazolam for the following:
sertraline and paroxetine. However, data from an in vivo drug interaction study involving a
single dose of alprazolam 1 mg and steady state dose of sertraline (50 to 150 mg/day) did not
reveal any clinically significant changes in the pharmacokinetics of alprazolam. Data from in
vitro studies of benzodiazepines other than alprazolam suggest a possible drug interaction for
the following: ergotamine, cyclosporine, amiodarone, nicardipine, and nifedipine. Caution is
recommended during the coadministration of any of these with alprazolam (see
WARNINGS).
Drugs demonstrated to be inducers of CYP3A
Carbamazepine can increase alprazolam metabolism and therefore can decrease plasma levels
of alprazolam.
Drug/Laboratory Test Interactions
Although interactions between benzodiazepines and commonly employed clinical laboratory
tests have occasionally been reported, there is no consistent pattern for a specific drug or
specific test.
Carcinogenesis, Mutagenesis, Impairment of Fertility
No evidence of carcinogenic potential was observed during 2-year bioassay studies of
alprazolam in rats at doses up to 30 mg/kg/day (150 times the maximum recommended daily
human dose of 10 mg/day) and in mice at doses up to 10 mg/kg/day (50 times the maximum
recommended daily human dose).
Alprazolam was not mutagenic in the rat micronucleus test at doses up to 100 mg/kg, which is
500 times the maximum recommended daily human dose of 10 mg/day. Alprazolam also was
not mutagenic in vitro in the DNA Damage/Alkaline Elution Assay or the Ames Assay.
Alprazolam produced no impairment of fertility in rats at doses up to 5 mg/kg/day, which is
25 times the maximum recommended daily human dose of 10 mg/day.
Pregnancy
Teratogenic Effects: Pregnancy Category D: (See WARNINGS section).
Nonteratogenic Effects: It should be considered that the child born of a mother who is
receiving benzodiazepines may be at some risk for withdrawal symptoms from the drug
during the postnatal period. Also, neonatal flaccidity and respiratory problems have been
reported in children born of mothers who have been receiving benzodiazepines.
Labor and Delivery
XANAX has no established use in labor or delivery.
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Nursing Mothers
Benzodiazepines are known to be excreted in human milk. It should be assumed that
alprazolam is as well. Chronic administration of diazepam to nursing mothers has been
reported to cause their infants to become lethargic and to lose weight. As a general rule,
nursing should not be undertaken by mothers who must use XANAX.
Pediatric Use
Safety and effectiveness of XANAX in individuals below 18 years of age have not been
established.
Geriatric Use
The elderly may be more sensitive to the effects of benzodiazepines. They exhibit higher
plasma alprazolam concentrations due to reduced clearance of the drug as compared with a
younger population receiving the same doses. The smallest effective dose of XANAX should
be used in the elderly to preclude the development of ataxia and oversedation (see CLINICAL
PHARMACOLOGY and DOSAGE AND ADMINISTRATION).
ADVERSE REACTIONS
Side effects to XANAX Tablets, if they occur, are generally observed at the beginning of
therapy and usually disappear upon continued medication. In the usual patient, the most
frequent side effects are likely to be an extension of the pharmacological activity of
alprazolam, eg, drowsiness or light-headedness.
The data cited in the two tables below are estimates of untoward clinical event incidence
among patients who participated under the following clinical conditions: relatively short
duration (ie, four weeks) placebo-controlled clinical studies with dosages up to 4 mg/day of
XANAX (for the management of anxiety disorders or for the short-term relief of the
symptoms of anxiety) and short-term (up to ten weeks) placebo-controlled clinical studies
with dosages up to 10 mg/day of XANAX in patients with panic disorder, with or without
agoraphobia.
These data cannot be used to predict precisely the incidence of untoward events in the course
of usual medical practice where patient characteristics, and other factors often differ from
those in clinical trials. These figures cannot be compared with those obtained from other
clinical studies involving related drug products and placebo as each group of drug trials are
conducted under a different set of conditions.
Comparison of the cited figures, however, can provide the prescriber with some basis for
estimating the relative contributions of drug and non-drug factors to the untoward event
incidence in the population studied. Even this use must be approached cautiously, as a drug
may relieve a symptom in one patient but induce it in others. (For example, an anxiolytic drug
may relieve dry mouth [a symptom of anxiety] in some subjects but induce it [an untoward
event] in others.)
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Reference ID: 4029640
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For current labeling information, please visit https://www.fda.gov/drugsatfda
Additionally, for anxiety disorders the cited figures can provide the prescriber with an
indication as to the frequency with which physician intervention (eg, increased surveillance,
decreased dosage or discontinuation of drug therapy) may be necessary because of the
untoward clinical event.
14
Reference ID: 4029640
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For current labeling information, please visit https://www.fda.gov/drugsatfda
Treatment-Emergent Adverse Events Reported in Placebo-Controlled Trials of Anxiety
Disorders
ANXIETY DISORDERS
Treatment-Emergent Incidence of Intervention
Symptom Incidence† Because of Symptom
XANAX PLACEBO XANAX
Number of Patients 565 505 565
% of Patients
Reporting:
Central Nervous System
Drowsiness 41.0 21.6 15.1
Light-headedness 20.8 19.3 1.2
Depression 13.9 18.1 2.4
Headache 12.9 19.6 1.1
Confusion 9.9 10.0 0.9
Insomnia 8.9 18.4 1.3
Nervousness 4.1 10.3 1.1
Syncope 3.1 4.0 *
Dizziness 1.8 0.8 2.5
Akathisia 1.6 1.2 *
Tiredness/Sleepiness * * 1.8
Gastrointestinal
Dry Mouth 14.7 13.3 0.7
Constipation 10.4 11.4 0.9
Diarrhea 10.1 10.3 1.2
Nausea/Vomiting 9.6 12.8 1.7
Increased Salivation 4.2 2.4 *
Cardiovascular
Tachycardia/Palpitations 7.7 15.6 0.4
Hypotension 4.7 2.2 *
Sensory
Blurred Vision 6.2 6.2 0.4
Musculoskeletal
Rigidity 4.2 5.3 *
Tremor 4.0 8.8 0.4
Cutaneous
Dermatitis/Allergy 3.8 3.1 0.6
Other
Nasal Congestion 7.3 9.3 *
Weight Gain 2.7 2.7 *
Weight Loss 2.3 3.0 *
*None reported
†Events reported by 1% or more of XANAX patients are included.
In addition to the relatively common (ie, greater than 1%) untoward events enumerated in the
table above, the following adverse events have been reported in association with the use of
benzodiazepines: dystonia, irritability, concentration difficulties, anorexia, transient amnesia
or memory impairment, loss of coordination, fatigue, seizures, sedation, slurred speech,
jaundice, musculoskeletal weakness, pruritus, diplopia, dysarthria, changes in libido,
menstrual irregularities, incontinence and urinary retention.
Treatment-Emergent Adverse Events Reported in Placebo-Controlled Trials of Panic
Disorder
PANIC DISORDER
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Treatment-Emergent
Symptom Incidence*
XANAX PLACEBO
Number of Patients 1388 1231
% of Patients Reporting:
Central Nervous System
Drowsiness 76.8 42.7
Fatigue and Tiredness 48.6 42.3
Impaired Coordination 40.1 17.9
Irritability 33.1 30.1
Memory Impairment 33.1 22.1
Light-headedness/Dizziness 29.8 36.9
Insomnia 29.4 41.8
Headache 29.2 35.6
Cognitive Disorder 28.8 20.5
Dysarthria 23.3 6.3
Anxiety 16.6 24.9
Abnormal Involuntary Movement 14.8 21.0
Decreased Libido 14.4 8.0
Depression 13.8 14.0
Confusional State 10.4 8.2
Muscular Twitching 7.9 11.8
Increased Libido 7.7 4.1
Change in Libido (Not Specified) 7.1 5.6
Weakness 7.1 8.4
Muscle Tone Disorders 6.3 7.5
Syncope 3.8 4.8
Akathisia 3.0 4.3
Agitation 2.9 2.6
Disinhibition 2.7 1.5
Paresthesia 2.4 3.2
Talkativeness 2.2 1.0
Vasomotor Disturbances 2.0 2.6
Derealization 1.9 1.2
Dream Abnormalities 1.8 1.5
Fear 1.4 1.0
Feeling Warm 1.3 0.5
Gastrointestinal
Decreased Salivation 32.8 34.2
Constipation 26.2 15.4
Nausea/Vomiting 22.0 31.8
Diarrhea 20.6 22.8
Abdominal Distress 18.3 21.5
Increased Salivation 5.6 4.4
Cardio-Respiratory
Nasal Congestion 17.4 16.5
Tachycardia 15.4 26.8
Chest Pain 10.6 18.1
Hyperventilation 9.7 14.5
Upper Respiratory Infection 4.3 3.7
Sensory
Blurred Vision 21.0 21.4
Tinnitus 6.6 10.4
Musculoskeletal
Muscular Cramps 2.4 2.4
Muscle Stiffness 2.2 3.3
Cutaneous
Sweating 15.1 23.5
Rash 10.8 8.1
Other
Increased Appetite 32.7 22.8
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Decreased Appetite 27.8 24.1
Weight Gain 27.2 17.9
Weight Loss 22.6 16.5
Micturition Difficulties 12.2 8.6
Menstrual Disorders 10.4 8.7
Sexual Dysfunction 7.4 3.7
Edema 4.9 5.6
Incontinence 1.5 0.6
Infection 1.3 1.7
*Events reported by 1% or more of XANAX patients are included.
In addition to the relatively common (ie, greater than 1%) untoward events enumerated in the
table above, the following adverse events have been reported in association with the use of
XANAX: seizures, hallucinations, depersonalization, taste alterations, diplopia, elevated
bilirubin, elevated hepatic enzymes, and jaundice.
Panic disorder has been associated with primary and secondary major depressive disorders
and increased reports of suicide among untreated patients (see PRECAUTIONS, General).
Adverse Events Reported as Reasons for Discontinuation in Treatment of Panic
Disorder in Placebo-Controlled Trials
In a larger database comprised of both controlled and uncontrolled studies in which 641
patients received XANAX, discontinuation-emergent symptoms which occurred at a rate of
over 5% in patients treated with XANAX and at a greater rate than the placebo treated group
were as follows:
DISCONTINUATION-EMERGENT SYMPTOM INCIDENCE
Percentage of 641 XANAX-Treated Panic Disorder
Patients Reporting Events
Body System/Event
Neurologic Gastrointestinal
Insomnia 29.5 Nausea/Vomiting 16.5
Light-headedness 19.3 Diarrhea 13.6
Abnormal involuntary movement 17.3 Decreased salivation 10.6
Headache 17.0
Metabolic-Nutritional
Muscular twitching 6.9 Weight loss 13.3
Impaired coordination 6.6 Decreased appetite 12.8
Muscle tone disorders 5.9
Weakness 5.8
Dermatological
Psychiatric
Sweating 14.4
Anxiety 19.2
Fatigue and Tiredness 18.4
Cardiovascular
Irritability 10.5 Tachycardia 12.2
Cognitive disorder 10.3
Memory impairment 5.5
Special Senses
Depression 5.1 Blurred vision 10.0
Confusional state 5.0
From the studies cited, it has not been determined whether these symptoms are clearly related
to the dose and duration of therapy with XANAX in patients with panic disorder. There have
also been reports of withdrawal seizures upon rapid decrease or abrupt discontinuation of
XANAX Tablets (see WARNINGS).
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For current labeling information, please visit https://www.fda.gov/drugsatfda
To discontinue treatment in patients taking XANAX, the dosage should be reduced slowly in
keeping with good medical practice. It is suggested that the daily dosage of XANAX be
decreased by no more than 0.5 mg every three days (see DOSAGE AND
ADMINISTRATION). Some patients may benefit from an even slower dosage reduction. In a
controlled postmarketing discontinuation study of panic disorder patients which compared
this recommended taper schedule with a slower taper schedule, no difference was observed
between the groups in the proportion of patients who tapered to zero dose; however, the
slower schedule was associated with a reduction in symptoms associated with a withdrawal
syndrome.
As with all benzodiazepines, paradoxical reactions such as stimulation, increased muscle
spasticity, sleep disturbances, hallucinations and other adverse behavioral effects such as
agitation, rage, irritability, and aggressive or hostile behavior have been reported rarely. In
many of the spontaneous case reports of adverse behavioral effects, patients were receiving
other CNS drugs concomitantly and/or were described as having underlying psychiatric
conditions. Should any of the above events occur, alprazolam should be discontinued. Isolated
published reports involving small numbers of patients have suggested that patients who have
borderline personality disorder, a prior history of violent or aggressive behavior, or alcohol or
substance abuse may be at risk for such events. Instances of irritability, hostility, and intrusive
thoughts have been reported during discontinuation of alprazolam in patients with
posttraumatic stress disorder.
Post Introduction Reports: Various adverse drug reactions have been reported in association
with the use of XANAX since market introduction. The majority of these reactions were
reported through the medical event voluntary reporting system. Because of the spontaneous
nature of the reporting of medical events and the lack of controls, a causal relationship to the
use of XANAX cannot be readily determined. Reported events include: gastrointestinal
disorder, hypomania, mania, liver enzyme elevations, hepatitis, hepatic failure, Stevens-
Johnson syndrome, angioedema, peripheral edema, hyperprolactinemia, gynecomastia, and
galactorrhea (see PRECAUTIONS).
DRUG ABUSE AND DEPENDENCE
Physical and Psychological Dependence
Withdrawal symptoms similar in character to those noted with sedative/hypnotics and alcohol
have occurred following discontinuance of benzodiazepines, including XANAX. The
symptoms can range from mild dysphoria and insomnia to a major syndrome that may include
abdominal and muscle cramps, vomiting, sweating, tremors and convulsions. Distinguishing
between withdrawal emergent signs and symptoms and the recurrence of illness is often
difficult in patients undergoing dose reduction. The long term strategy for treatment of these
phenomena will vary with their cause and the therapeutic goal. When necessary, immediate
management of withdrawal symptoms requires re-institution of treatment at doses of XANAX
sufficient to suppress symptoms. There have been reports of failure of other benzodiazepines
to fully suppress these withdrawal symptoms. These failures have been attributed to
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Reference ID: 4029640
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For current labeling information, please visit https://www.fda.gov/drugsatfda
incomplete cross-tolerance but may also reflect the use of an inadequate dosing regimen of the
substituted benzodiazepine or the effects of concomitant medications.
While it is difficult to distinguish withdrawal and recurrence for certain patients, the time
course and the nature of the symptoms may be helpful. A withdrawal syndrome typically
includes the occurrence of new symptoms, tends to appear toward the end of taper or shortly
after discontinuation, and will decrease with time. In recurring panic disorder, symptoms
similar to those observed before treatment may recur either early or late, and they will persist.
While the severity and incidence of withdrawal phenomena appear to be related to dose and
duration of treatment, withdrawal symptoms, including seizures, have been reported after only
brief therapy with XANAX at doses within the recommended range for the treatment of
anxiety (eg, 0.75 to 4 mg/day). Signs and symptoms of withdrawal are often more prominent
after rapid decrease of dosage or abrupt discontinuance. The risk of withdrawal seizures may
be increased at doses above 4 mg/day (see WARNINGS).
Patients, especially individuals with a history of seizures or epilepsy, should not be abruptly
discontinued from any CNS depressant agent, including XANAX. It is recommended that all
patients on XANAX who require a dosage reduction be gradually tapered under close
supervision (see WARNINGS and DOSAGE AND ADMINISTRATION).
Psychological dependence is a risk with all benzodiazepines, including XANAX. The risk of
psychological dependence may also be increased at doses greater than 4 mg/day and with
longer term use, and this risk is further increased in patients with a history of alcohol or drug
abuse. Some patients have experienced considerable difficulty in tapering and discontinuing
from XANAX, especially those receiving higher doses for extended periods. Addiction-prone
individuals should be under careful surveillance when receiving XANAX. As with all
anxiolytics, repeat prescriptions should be limited to those who are under medical
supervision.
Controlled Substance Class
Alprazolam is a controlled substance under the Controlled Substance Act by the Drug
Enforcement Administration and XANAX Tablets have been assigned to Schedule IV.
OVERDOSAGE
Clinical Experience
Manifestations of alprazolam overdosage include somnolence, confusion, impaired
coordination, diminished reflexes and coma. Death has been reported in association with
overdoses of alprazolam by itself, as it has with other benzodiazepines. In addition, fatalities
have been reported in patients who have overdosed with a combination of a single
benzodiazepine, including alprazolam, and alcohol; alcohol levels seen in some of these
patients have been lower than those usually associated with alcohol-induced fatality.
The acute oral LD
50
in rats is 331-2171 mg/kg. Other experiments in animals have indicated
that cardiopulmonary collapse can occur following massive intravenous doses of alprazolam
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Reference ID: 4029640
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For current labeling information, please visit https://www.fda.gov/drugsatfda
(over 195 mg/kg; 975 times the maximum recommended daily human dose of 10 mg/day).
Animals could be resuscitated with positive mechanical ventilation and the intravenous
infusion of norepinephrine bitartrate.
Animal experiments have suggested that forced diuresis or hemodialysis are probably of little
value in treating overdosage.
General Treatment of Overdose
Overdosage reports with XANAX Tablets are limited. As in all cases of drug overdosage,
respiration, pulse rate, and blood pressure should be monitored. General supportive measures
should be employed, along with immediate gastric lavage. Intravenous fluids should be
administered and an adequate airway maintained. If hypotension occurs, it may be combated
by the use of vasopressors. Dialysis is of limited value. As with the management of
intentional overdosing with any drug, it should be borne in mind that multiple agents may
have been ingested.
Flumazenil, a specific benzodiazepine receptor antagonist, is indicated for the complete or
partial reversal of the sedative effects of benzodiazepines and may be used in situations when
an overdose with a benzodiazepine is known or suspected. Prior to the administration of
flumazenil, necessary measures should be instituted to secure airway, ventilation and
intravenous access. Flumazenil is intended as an adjunct to, not as a substitute for, proper
management of benzodiazepine overdose. Patients treated with flumazenil should be
monitored for re-sedation, respiratory depression, and other residual benzodiazepine effects
for an appropriate period after treatment. The prescriber should be aware of a risk of
seizure in association with flumazenil treatment, particularly in long-term
benzodiazepine users and in cyclic antidepressant overdose. The complete flumazenil
package insert including CONTRAINDICATIONS, WARNINGS and PRECAUTIONS
should be consulted prior to use.
DOSAGE AND ADMINISTRATION
Dosage should be individualized for maximum beneficial effect. While the usual daily
dosages given below will meet the needs of most patients, there will be some who require
doses greater than 4 mg/day. In such cases, dosage should be increased cautiously to avoid
adverse effects.
Anxiety Disorders and Transient Symptoms of Anxiety
Treatment for patients with anxiety should be initiated with a dose of 0.25 to 0.5 mg given
three times daily. The dose may be increased to achieve a maximum therapeutic effect, at
intervals of 3 to 4 days, to a maximum daily dose of 4 mg, given in divided doses. The lowest
possible effective dose should be employed and the need for continued treatment reassessed
frequently. The risk of dependence may increase with dose and duration of treatment.
In all patients, dosage should be reduced gradually when discontinuing therapy or when
decreasing the daily dosage. Although there are no systematically collected data to support a
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Reference ID: 4029640
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For current labeling information, please visit https://www.fda.gov/drugsatfda
specific discontinuation schedule, it is suggested that the daily dosage be decreased by no
more than 0.5 mg every 3 days. Some patients may require an even slower dosage reduction.
Panic Disorder
The successful treatment of many panic disorder patients has required the use of XANAX at
doses greater than 4 mg daily. In controlled trials conducted to establish the efficacy of
XANAX in panic disorder, doses in the range of 1 to 10 mg daily were used. The mean
dosage employed was approximately 5 to 6 mg daily. Among the approximately 1700 patients
participating in the panic disorder development program, about 300 received XANAX in
dosages of greater than 7 mg/day, including approximately 100 patients who received
maximum dosages of greater than 9 mg/day. Occasional patients required as much as 10 mg a
day to achieve a successful response.
Dose Titration
Treatment may be initiated with a dose of 0.5 mg three times daily. Depending on the
response, the dose may be increased at intervals of 3 to 4 days in increments of no more than
1 mg per day. Slower titration to the dose levels greater than 4 mg/day may be advisable to
allow full expression of the pharmacodynamic effect of XANAX. To lessen the possibility of
interdose symptoms, the times of administration should be distributed as evenly as possible
throughout the waking hours, that is, on a three or four times per day schedule.
Generally, therapy should be initiated at a low dose to minimize the risk of adverse responses
in patients especially sensitive to the drug. Dose should be advanced until an acceptable
therapeutic response (ie, a substantial reduction in or total elimination of panic attacks) is
achieved, intolerance occurs, or the maximum recommended dose is attained.
Dose Maintenance
For patients receiving doses greater than 4 mg/day, periodic reassessment and consideration
of dosage reduction is advised. In a controlled postmarketing dose-response study, patients
treated with doses of XANAX greater than 4 mg/day for 3 months were able to taper to 50%
of their total maintenance dose without apparent loss of clinical benefit. Because of the danger
of withdrawal, abrupt discontinuation of treatment should be avoided. (See WARNINGS,
PRECAUTIONS, DRUG ABUSE AND DEPENDENCE.)
The necessary duration of treatment for panic disorder patients responding to XANAX is
unknown. After a period of extended freedom from attacks, a carefully supervised tapered
discontinuation may be attempted, but there is evidence that this may often be difficult to
accomplish without recurrence of symptoms and/or the manifestation of withdrawal
phenomena.
Dose Reduction
Because of the danger of withdrawal, abrupt discontinuation of treatment should be avoided
(see WARNINGS, PRECAUTIONS, DRUG ABUSE AND DEPENDENCE).
In all patients, dosage should be reduced gradually when discontinuing therapy or when
decreasing the daily dosage. Although there are no systematically collected data to support a
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Reference ID: 4029640
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specific discontinuation schedule, it is suggested that the daily dosage be decreased by no
more than 0.5 mg every three days. Some patients may require an even slower dosage
reduction.
In any case, reduction of dose must be undertaken under close supervision and must be
gradual. If significant withdrawal symptoms develop, the previous dosing schedule should be
reinstituted and, only after stabilization, should a less rapid schedule of discontinuation be
attempted. In a controlled postmarketing discontinuation study of panic disorder patients
which compared this recommended taper schedule with a slower taper schedule, no difference
was observed between the groups in the proportion of patients who tapered to zero dose;
however, the slower schedule was associated with a reduction in symptoms associated with a
withdrawal syndrome. It is suggested that the dose be reduced by no more than 0.5 mg every
3 days, with the understanding that some patients may benefit from an even more gradual
discontinuation. Some patients may prove resistant to all discontinuation regimens.
Dosing in Special Populations
In elderly patients, in patients with advanced liver disease or in patients with debilitating
disease, the usual starting dose is 0.25 mg, given two or three times daily. This may be
gradually increased if needed and tolerated. The elderly may be especially sensitive to the
effects of benzodiazepines. If side effects occur at the recommended starting dose, the dose
may be lowered.
HOW SUPPLIED
XANAX Tablets are available as follows:
0.25 mg (white, oval, scored, imprinted “XANAX 0.25”)
Bottles of 100 NDC 0009-0029-01
Reverse Numbered
Unit dose (100) NDC 0009-0029-46
Bottles of 500 NDC 0009-0029-02
Bottles of 1000 NDC 0009-0029-14
0.5 mg (peach, oval, scored, imprinted “XANAX 0.5”)
Bottles of 100 NDC 0009-0055-01
Reverse Numbered
Unit Dose (100) NDC 0009-0055-46
Bottles of 500 NDC 0009-0055-03
Bottles of 1000 NDC 0009-0055-15
1 mg (blue, oval, scored, imprinted “XANAX 1.0”)
Bottles of 100 NDC 0009-0090-01
Bottles of 500 NDC 0009-0090-04
Bottles of 1000 NDC 0009-0090-13
2 mg (white, oblong, multi-scored, imprinted “XANAX ” on one side and “2” on the reverse
side)
Bottles of 100 NDC 0009-0094-01
Bottles of 500 NDC 0009-0094-03
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Store at controlled room temperature 20° to 25°C (68° to 77°F) [see USP].
Rx only
ANIMAL STUDIES
When rats were treated with alprazolam at 3, 10, and 30 mg/kg/day (15 to 150 times the
maximum recommended human dose) orally for 2 years, a tendency for a dose related
increase in the number of cataracts was observed in females and a tendency for a dose related
increase in corneal vascularization was observed in males. These lesions did not appear until
after 11 months of treatment.
This product’s label may have been updated. For current full prescribing information, please
visit www.pfizer.com.
LAB-0004-8.1
Revised September 2016
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Reference ID: 4029640
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MEDICATION GUIDE
XANAX (
ZAN-aks)
(alprazolam) Tablets, C-IV
What is the most important information I should know about XANAX?
XANAX is a benzodiazepine medicine. Taking benzodiazepines with opioid medicines,
alcohol, or other central nervous system depressants (including street drugs) can
cause severe drowsiness, breathing problems (respiratory depression), coma and
death.
XANAX can make you sleepy or dizzy, and can slow your thinking and motor skills.
o Do not drive, operate heavy machinery, or do other dangerous activities until you know how
XANAX affects you.
o Do not drink alcohol or take other drugs that may make you sleepy or dizzy while taking
XANAX without first talking to your healthcare provider. When taken with alcohol or drugs
that cause sleepiness or dizziness, XANAX may make your sleepiness or dizziness much
worse.
Do not take more Xanax than prescribed.
What is XANAX?
XANAX is a prescription medicine used:
o to treat anxiety disorders
o for the short-term relief of the symptoms of anxiety
o to treat panic disorder with or without a fear of places and situations that might
cause panic, helplessness, or embarrassment (agoraphobia)
XANAX is a federal controlled substance (C-IV) because it can be abused or lead to
dependence. Keep XANAX in a safe place to prevent misuse and abuse. Selling or giving
away XANAX may harm others, and is against the law. Tell your healthcare provider if you
have abused or been dependent on alcohol, prescription medicines or street drugs.
It is not known if XANAX is safe and effective in children.
Elderly patients are especially susceptible to dose related adverse effects when taking XANAX.
It is not known if XANAX is safe and effective when used to treat anxiety disorder for longer than 4
months.
It is not known if XANAX is safe and effective when used to treat panic disorder for longer than 10
weeks.
Do not take XANAX if:
you are allergic to alprazolam, other benzodiazepines, or any of the ingredients in XANAX. See
the end of this Medication Guide for a complete list of ingredients in XANAX.
you are taking antifungal medicines including ketoconazole and itraconazole
Before you take XANAX, tell your healthcare provider about all of your medical conditions,
including if you:
have or have had depression, mood problems, or suicidal thoughts or behavior
have liver or kidney problems
have lung disease or breathing problems
are pregnant or plan to become pregnant. XANAX may harm your unborn baby. You and your
healthcare provider should decide if you should take XANAX while you are pregnant.
are breastfeeding or plan to breastfeed. XANAX passes into your breast milk and may harm
your baby. Talk to your healthcare provider about the best way to feed your baby if you
take XANAX. You should not breastfeed while taking XANAX.
Tell your healthcare provider about all the medicines you take, including prescription and over-
the-counter medicines, vitamins, and herbal supplements.
Taking XANAX with certain other medicines can cause side effects or affect how well XANAX or the
other medicines work. Do not start or stop other medicines without talking to your healthcare provider.
How should I take XANAX?
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See “What is the most important information I should know about XANAX?”
Take XANAX exactly as your healthcare provider tells you to take it. Your healthcare
provider will tell you how much XANAX to take and when to take it.
If you take too much XANAX, call your healthcare provider or go to the nearest hospital emergency
room right away.
What should I avoid while taking XANAX?
XANAX can cause you to be drowsy. Do not drive a car or operate heavy machinery until you
know how XANAX affects you.
You should not drink alcohol while taking XANAX. Drinking alcohol can increase your chances of
having serious side effects.
What are the possible side effects of XANAX?
XANAX may cause serious side effects, including:
See “What is the most important information I should know about XANAX?”
Abuse and dependence. Taking XANAX can cause physical and psychological dependence.
Physical and psychological dependence is not the same as drug addiction. Your healthcare
provider can tell you more about the differences between physical and psychological dependence
and drug addiction.
Withdrawal symptoms. You may have withdrawal symptoms if you stop taking XANAX suddenly.
Withdrawal symptoms can be serious and include seizures. Mild withdrawal symptoms include a
depressed mood and trouble sleeping. Talk to your healthcare provider about slowly stopping
XANAX to avoid withdrawal symptoms.
Seizures. Stopping XANAX can cause seizures and seizures that will not stop (status epilepticus).
Mania. XANAX may cause an increase in activity and talking (hypomania and mania) in people
who have depression.
The most common side effects of XANAX include drowsiness and light-headedness. These are not
all the possible side effects of XANAX. Call your doctor for medical advice about side effects. You may
report side effects to FDA at 1-800-FDA-1088.
How should I store XANAX?
Store XANAX between 68°F to 77°F 20°C to 25°C
Keep XANAX and all medicines out of the reach of children.
General information about the safe and effective use of XANAX.
Medicines are sometimes prescribed for purposes other than those listed in a Medication
Guide.
Do not use XANAX for a condition for which it was not prescribed.
Do not give XANAX to other people, even if they have the same symptoms that you have. It
may harm them.
You can ask your pharmacist or healthcare provider for information about XANAX that is written
for health professionals.
What are the ingredients in XANAX?
Active ingredient: alprazolam
Inactive ingredients: Cellulose, corn starch, docusate sodium, lactose, magnesium stearate, silicon
dioxide and sodium benzoate. In addition, the 0.5 mg tablet contains FD&C Yellow No. 6 and the 1 mg
tablet contains FD&C Blue No. 2.
XANAX® is a registered trademark of Pharmacia & Upjohn Company LLC.
For more information, go to www.pfizer.com or call 1-800-438-1985.
This Medication Guide has been approved by the U.S. Food and Drug Administration.
This product’s label may have been updated. For current full prescribing information, please visit
www.pfizer.com.
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Reference ID: 4029640
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LAB 0825-0.1
Revised September 2016
Reference ID: 4029640
26
This label may not be the latest approved by FDA.
For current labeling information, please visit https://www.fda.gov/drugsatfda