Clorazepate and Suvorexant interaction

Clorazepate and Suvorexant: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.

Major

Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.

What the FDA labels say

From the Clorazepate (Clorazepate Dipotassium) label · effective 2026-07-24

Major

Prescribe the lowest effective dosage; avoid or minimize concomitant use of CNS depressants and other substances associated with abuse, misuse, and addiction (e.g., opioid analgesics, stimulants); and advise patients on the proper disposal of unused drug.

Warningsby drug classView label on DailyMed
Moderate

Concomitant Use with CNS Depressants Since clorazepate dipotassium has a central nervous system depressant effect, patients should be advised against the simultaneous use of other CNS depressant drugs, and cautioned that the effects of alcohol may be increased.

Warningsby drug classView label on DailyMed
Moderate

Clinical studies have shown increased sedation with concurrent hypnotic medications.

Drug interactionsby drug classView label on DailyMed
Moderate

However, the sedative effects of high dose clorazepate interfered with the maternal care of the offspring.

Drug interactionsby drug classView label on DailyMed

From the Suvorexant (BELSOMRA) label · effective 2025-03-10

Moderate

CNS Depressant Effects and Daytime Impairment: Risk of impaired alertness and motor coordination, including impaired driving; risk increases with dose; caution patients taking 20 mg against next-day driving and other activities requiring complete mental alertness ( 5.1 ).

Warnings and precautionsby drug classView label on DailyMed
Moderate

Prescribers should monitor for somnolence and CNS depressant effects, but impairment can occur in the absence of symptoms, and may not be reliably detected by ordinary clinical exam (i.e., less than formal testing of daytime wakefulness and/or psychomotor performance).

Warnings and precautionsby drug classView label on DailyMed
Moderate

Co-administration with other CNS depressants (e.g., benzodiazepines, opioids, tricyclic antidepressants, alcohol) increases the risk of CNS depression.

Warnings and precautionsby drug classView label on DailyMed
Moderate

Dosage adjustments of BELSOMRA and of concomitant CNS depressants may be necessary when administered together because of potentially additive effects.

Warnings and precautionsby drug classView label on DailyMed
Moderate

The risk of next-day impairment, including impaired driving, is increased if BELSOMRA is taken with less than a full night of sleep remaining, if a higher than the recommended dose is taken, if co-administered with other CNS depressants, or if co-administered with other drugs that increase blood levels of BELSOMRA.

Warnings and precautionsby drug classView label on DailyMed

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Not medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.