Do Not Take Belsomra (Suvorexant) with Alcohol
You should not consume alcohol while taking Belsomra because the combination causes additive psychomotor impairment and significantly increases the risk of dangerous CNS depression. 1
What Happens When Combined
When Belsomra is taken with alcohol, the following occurs:
- Additive psychomotor impairment - Your coordination, reaction time, and cognitive function become significantly more impaired than with either substance alone 1
- Enhanced CNS depression - The sedative effects compound, increasing risk of:
- Excessive daytime somnolence
- Falls (particularly concerning in elderly patients)
- Impaired driving ability
- Complex sleep behaviors (sleep-walking, sleep-driving, eating while not fully awake) 1
- Respiratory depression
FDA Warning
The FDA label explicitly states: "Patients should be advised not to consume alcohol in combination with BELSOMRA because of additive effects." 1 This is a clear, unequivocal contraindication to concurrent use.
Mechanism
The interaction is purely pharmacodynamic (additive CNS depression) rather than pharmacokinetic - alcohol does not alter Belsomra's blood levels, but the combined depressant effects on the central nervous system are dangerous 1.
Clinical Implications
- If a patient has consumed alcohol, they should skip their Belsomra dose that night
- Counsel patients that even moderate alcohol consumption earlier in the evening can interact with bedtime Belsomra dosing
- The risk is dose-dependent for Belsomra - higher doses (20 mg) carry greater risk, but the interaction occurs at all therapeutic doses
- Women and obese patients have higher Belsomra exposure and face increased risk of adverse effects from this combination 1
Common Pitfall
Do not assume that spacing alcohol and Belsomra by a few hours eliminates the risk. Alcohol's CNS depressant effects persist beyond its presence in the bloodstream, and the combination remains dangerous even with temporal separation on the same evening.