Diphenhydramine
Compoz is a brand-name over-the-counter medication primarily marketed as a nighttime sleep aid. Its active ingredient is diphenhydramine, an antihistamine that causes drowsiness by affecting brain signals. This medication is typically used by adults and children over 12 who have occasional difficulty falling asleep.
Compoz is an antihistamine-based sleep aid used to help individuals who have trouble falling asleep.
Key facts at a glance
- RxNorm
- 1085965
- Generic
- Compoz
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Temporary relief of occasional sleeplessness and difficulty falling asleep. Some formulations may also provide relief from hay fever, allergies, or cold symptoms due to its antihistamine properties.
Compoz contains diphenhydramine, which blocks histamine H1 receptors in the body and crosses the blood-brain barrier, producing a sedative effect that helps initiate sleep.
Should only be used for short-term treatment of sleep difficulties. May cause drowsiness the next day. Avoid alcohol and operating machinery while taking this medication. Not recommended for use in children under 12 without medical advice. Consult a healthcare provider if sleeplessness persists beyond 2 weeks.
Official drug label
WellAlly may earn a referral fee from linked resources at no extra cost to you. Editorial content is never influenced by commercial relationships.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 26, 2026. · Read our editorial policy