Diphenhydramine Maximum Strength
Wal-Som Maximum Strength is an over-the-counter sleep aid designed to help adults have difficulty falling asleep. It contains an antihistamine ingredient that promotes drowsiness to assist with occasional sleeplessness. This medication is intended for short-term use when sleep difficulties arise.
Wal-Som Maximum Strength is an OTC sleep aid that helps adults fall asleep when experiencing occasional sleeplessness.
Key facts at a glance
- RxNorm
- 1090453
- Generic
- Wal-Som Maximum Strength
- 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.
Temporarily relieves occasional difficulty falling asleep due to fatigue or stress. It is marketed for adults who need help getting to sleep when their normal sleep patterns are disrupted.
Contains an antihistamine (likely diphenhydramine) that crosses the blood-brain barrier and causes sedation by blocking histamine receptors. This drowsiness effect helps users fall asleep more easily.
Should only be used by adults 18 and older. For short-term use only (consult a doctor if insomnia persists beyond 2 weeks). May cause next-day drowsiness. Avoid alcohol. Do not operate heavy machinery after taking. Should not be used by those with certain medical conditions without consulting a healthcare provider first.
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 26, 2026. · Read our editorial policy