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Niravam (Alprazolam) - Side Effects and Adverse Reactions

 
 



Adverse Reactions

Side effects to alprazolam, 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 lightheadedness.

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 alprazolam (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 alprazolam 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.)

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.

ANXIETY DISORDERS

Treatment-Emergent

Symptom Incidence 1

Incidence of Intervention Because of Symptom
ALPRAZOLAM PLACEBO ALPRAZOLAM

Number of Patients

% of Patients

Reporting:

565505565
Central Nervous System
Drowsiness41.021.615.1
Lightheadedness20.819.31.2
Depression13.918.12.4
Headache12.919.61.1
Confusion9.910.00.9
Insomnia8.918.41.3
Nervousness4.110.31.1
Syncope3.14.0 2
Dizziness1.80.82.5
Akathisia1.61.2
Tiredness/Sleepiness1.8
Gastrointestinal
Dry Mouth14.713.30.7
Constipation10.411.40.9
Diarrhea10.110.31.2
Nausea/Vomiting9.612.81.7
Increased Salivation4.22.4
Cardiovascular
Tachycardia/Palpitations7.715.60.4
Hypotension4.72.2
Sensory
Blurred Vision6.26.20.4
Musculoskeletal
Rigidity4.25.3
Tremor4.08.80.4
Cutaneous
Dermatitis/Allergy3.83.10.6
Other
Nasal Congestion7.39.3
Weight Gain2.72.7
Weight Loss2.33.0

1 Events reported by 1% or more of alprazolam patients are included.
2 None reported.

 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

Treatment-Emergent

Symptom Incidence 1

ALPRAZOLAM PLACEBO

Number of Patients

% of Patients Reporting:

13881231
Central Nervous System
Drowsiness76.842.7
Fatigue and Tiredness48.642.3
Impaired Coordination40.117.9
Irritability33.130.1
Memory Impairment33.122.1
Lightheadedness/Dizziness29.836.9
Insomnia29.441.8
Headache29.235.6
Cognitive Disorder28.820.5
Dysarthria23.36.3
Anxiety16.624.9
Abnormal Involuntary Movement14.821.0
Decreased Libido14.48.0
Depression13.814.0
Confusional State10.48.2
Muscular Twitching7.911.8
Increased Libido7.74.1
Change in Libido (Not Specified)7.15.6
Weakness7.18.4
Muscle Tone Disorders6.37.5
Syncope3.84.8
Akathisia3.04.3
Agitation2.92.6
Disinhibition2.71.5
Paresthesia2.43.2
Talkativeness2.21.0
Vasomotor Disturbances2.02.6
Derealization1.91.2
Dream Abnormalities 1.81.5
Fear1.41.0
Feeling Warm1.30.5
Gastrointestinal
Decreased Salivation32.834.2
Constipation26.215.4
Nausea/Vomiting22.031.8
Diarrhea20.622.8
Abdominal Distress18.321.5
Increased Salivation5.64.4
Cardio-Respiratory
Nasal Congestion17.416.5
Tachycardia15.426.8
Chest Pain10.618.1
Hyperventilation9.714.5
Upper Respiratory Infection4.33.7
Sensory
Blurred Vision21.021.4
Tinnitus6.610.4
Musculoskeletal
Muscular Cramps2.42.4
Muscle Stiffness2.23.3
Cutaneous
Sweating15.123.5
Rash10.88.1
Other
Increased Appetite32.722.8
Decreased Appetite27.824.1
Weight Gain27.217.9
Weight Loss22.616.5
Micturition Difficulties12.28.6
Menstrual Disorders10.48.7
Sexual Dysfunction7.43.7
Edema4.95.6
Incontinence1.50.6
Infection1.31.7

1 Events reported by 1% or more of alprazolam 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 alprazolam: 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 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 alprazolam, discontinuation-emergent symptoms which occurred at a rate of over 5% in patients treated with alprazolam and at a greater rate than the placebo-treated group were as follows:

DISCONTINUATION-EMERGENT SYMPTOM INCIDENCE

Percentage of 641 Alprazolam-Treated Panic Disorder

Patients Reporting Events

Body System/Event
Neurologic Gastrointestinal
Insomnia29.5Nausea/Vomiting16.5
Lightheadedness19.3Diarrhea13.6
Abnormal involuntary movement17.3Decreased salivation10.6
Headache17.0
Muscular twitching6.9 Metabolic-Nutritional
Impaired coordination6.6Weight loss13.3
Muscle tone disorders5.9Decreased appetite12.8
Weakness5.8
Dermatological
Psychiatric Sweating14.4
Anxiety19.2
Fatigue and Tiredness18.4 Cardiovascular
Irritability10.5Tachycardia12.2
Cognitive disorder10.3
Memory impairment5.5 Special Senses
Depression5.1Blurred vision10.0
Confusional state5.0

From the studies cited, it has not been determined whether these symptoms are clearly related to the dose and duration of therapy with alprazolam in patients with panic disorder. There have also been reports of withdrawal seizures upon rapid decrease or abrupt discontinuation of alprazolam (see Warnings).

To discontinue treatment in patients taking NIRAVAM™, the dosage should be reduced slowly in keeping with good medical practice. It is suggested that the daily dosage of NIRAVAM™ 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 alprazolam 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 alprazolam cannot be readily determined. Reported events include: liver enzyme elevations, hepatitis, hepatic failure, Stevens-Johnson syndrome, hyperprolactinemia, gynecomastia, and galactorrhea.

Drug label data at the top of this Page last updated: 2007-03-30

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