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Quazepam (Quazepam) - Drug Interactions, Contraindications, Overdosage, etc



Benzodiazepines, including QUAZEPAM, produce additive CNS depressant effects when co-administered with ethanol or other CNS depressants (e.g. psychotropic medications, anticonvulsants, antihistamines). Downward dose adjustment of QUAZEPAM and/or concomitant CNS depressants may be necessary because of additive effects.


Contact a poison control center for up-to-date information on the management of benzodiazepine overdose.

Manifestations of QUAZEPAM overdose include somnolence, confusion, and coma. General supportive measures should be employed, along with immediate gastric lavage. Dialysis is of limited value. Flumazenil may be useful, but can contribute to the appearance of neurological symptoms including convulsions. Hypotension may be treated by appropriate medical intervention. Animal experiments suggest that forced diuresis or hemodialysis are of little value in treating QUAZEPAM overdose. As with the management of intentional overdose with any drug, the possibility of multiple drug ingestion should be considered.


QUAZEPAM is contraindicated in patients with known hypersensitivity to quazepam or other benzodiazepines. Rare cases of angioedema involving the tongue, glottis or larynx have been reported in patients after taking the first or subsequent doses of QUAZEPAM. Some patients have had additional symptoms such as dyspnea, throat closing, or nausea and vomiting that suggest anaphylaxis. Patients who develop such reactions should not be rechallenged with QUAZEPAM.

Contraindicated in patients with established or suspected sleep apnea, or with pulmonary insufficiency.


Controlled Substance

Quazepam is classified as a Schedule IV controlled substance by federal regulation.

Abuse and Dependence

Addiction-prone individuals (e.g. history of drug addiction or alcoholism) should be under careful surveillance when receiving QUAZEPAM because of increased risk of abuse and dependence. Benzodiazepine withdrawal symptoms can occur following discontinuation of QUAZEPAM [see Warnings and Precautions].

Abuse and addiction are separate and distinct from physical dependence and tolerance. Abuse is characterized by misuse of the drug for non-medical purposes, often in combination with other psychoactive substances. Physical dependence is a state of adaptation that is manifested by a specific withdrawal syndrome that can be produced by abrupt cessation, rapid dose reduction, decreasing blood level of the drug and/or administration of an antagonist. Tolerance is a state of adaptation in which exposure to a drug induces changes that result in a diminution of one or more of the drug’s effects over time. Tolerance may occur to both the desired and undesired effects of drugs and may develop at different rates for different effects.

Addiction is a primary, chronic, neurobiological disease with genetic, psychosocial, and environmental factors influencing its development and manifestations. It is characterized by behaviors that include one or more of the following: impaired control over drug use, compulsive use, continued use despite harm, and craving. Drug addiction is a treatable disease, utilizing a multidisciplinary approach, but relapse is common.

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