Zolpidem drug interactions

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

List of drug interactions

CNS-active drugs


Drugs that affect drug metabolism via cytochrome P450


Other drugs





CNS-active drugs

Since the systematic evaluations of Zolpidem tartrate tablets in combination with other CNS-active drugs have been limited, careful consideration should be given to the pharmacology of any CNS-active drug to be used with Zolpidem. Any drug with CNS-depressant effects could potentially enhance the CNS-depressant effects of Zolpidem. Return to top

Haloperidol

Zolpidem tartrate tablets were evaluated in healthy volunteers in single-dose interaction studies for several CNS drugs. A study involving haloperidol and Zolpidem revealed no effect of haloperidol on the pharmacokinetics or pharmacodynamics of Zolpidem. Return to top

Imipramine

Imipramine in combination with Zolpidem produced no pharmacokinetic interaction other than a 20% decrease in peak levels of imipramine, but there was an additive effect of decreased alertness. Return to top

Chlorpromazine

Similarly, chlorpromazine in combination with Zolpidem produced no pharmacokinetic interaction, but there was an additive effect of decreased alertness and psychomotor performance. The lack of a drug interaction following single-dose administration does not predict a lack following chronic administration. Return to top

Alcohol

An additive effect on psychomotor performance between alcohol and Zolpidem was demonstrated. Return to top

Fluoxetine

A single-dose interaction study with Zolpidem 10 mg and fluoxetine 20 mg at steady-state levels in male volunteers did not demonstrate any clinically significant pharmacokinetic or pharmacodynamic interactions. When multiple doses of Zolpidem and fluoxetine at steady-state concentrations were evaluated in healthy females, the only significant change was a 17% increase in the Zolpidem half-life. There was no evidence of an additive effect in psychomotor performance. Return to top

Sertraline

Following five consecutive nightly doses of Zolpidem 10 mg in the presence of sertraline 50 mg (17 consecutive daily doses, at 7:00 am, in healthy female volunteers), Zolpidem Cmax was significantly higher (43%) and Tmax was significantly decreased (53%). Pharmacokinetics of sertraline and N-desmethylsertraline were unaffected by Zolpidem. Return to top

Drugs that affect drug metabolism via cytochrome P450

Rifampin

A randomized, placebo-controlled, crossover interaction study in eight healthy female volunteers between 5 consecutive daily doses of rifampin (600 mg) and a single dose of Zolpidem (20 mg) given 17 hours after the last dose of rifampin showed significant reductions of the AUC (–73%), Cmax (–58%), and T1/2 (–36%) of Zolpidem together with significant reductions in the pharmacodynamic effects of Zolpidem. Return to top

Itraconazole

A randomized, double-blind, crossover interaction study in ten healthy volunteers between itraconazole (200 mg once daily for 4 days) and a single dose of Zolpidem (10 mg) given 5 hours after the last dose of itraconazole resulted in a 34% increase in AUC0-∞ of Zolpidem. There were no significant pharmacodynamic effects of Zolpidem on subjective drowsiness, postural sway, or psychomotor performance. Return to top

Other drugs

Cimetidine and ranitidine

A study involving cimetidine/Zolpidem and ranitidine/ Zolpidem combinations revealed no effect of either drug on the pharmacokinetics or pharmacodynamics of Zolpidem. Return to top

Warfarin

Zolpidem had no effect on digoxin kinetics and did not affect prothrombin time when given with warfarin in normal subjects. Return to top

Flumazenil

Zolpidem's sedative/hypnotic effect was reversed by flumazenil; however, no significant alterations in Zolpidem pharmacokinetics were found. Return to top

Ambien: Complete List of Drug Interactions

Major Interactions

Moderate Interactions

Minor Interactions




Adapted from the FDA Package Insert.


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