Diphenhydramine
Sleepinal is a brand-name sleep aid medication designed to help individuals who experience difficulty falling asleep or staying asleep. It is typically used by adults seeking temporary relief from occasional insomnia or sleep disturbances.
Sleepinal is an over-the-counter sleep medication used to help people fall asleep faster.
Key facts at a glance
- RxNorm
- 219956
- Generic
- Sleepinal
- 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.
Sleepinal is used for the temporary relief of occasional sleeplessness and difficulty initiating sleep. It may also be used to reduce sleep latency for individuals experiencing jet lag or temporary disruptions to their normal sleep schedule.
As a sedating antihistamine, Sleepinal typically produces drowsiness by blocking histamine receptors in the brain. The exact mechanism may vary by formulation, but the primary effect is central nervous system depression leading to sleepiness.
This medication should only be used temporarily (typically no more than 2 weeks) as directed. Users should avoid alcohol and should not operate machinery or drive until they know how the medication affects them. Consultation with a healthcare provider is recommended before use, especially for elderly patients, those with glaucoma, urinary retention, or breathing problems.
Official drug label
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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 August 29, 2026. · Read our editorial policy