Are over-the-counter sleep aids like diphenhydramine safe for regular use?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Over-the-counter sleep aids containing diphenhydramine are not recommended for regular use. These medications can cause side effects such as next-day drowsiness, dry mouth, dizziness, and impaired coordination. Long-term use may also lead to tolerance, cognitive issues, and increased health risks, especially in older adults.

If sleep troubles are affecting your daily life, it's important to understand the underlying cause rather than relying on temporary fixes. Take a free, instant, online symptom check to explore possible reasons behind your sleep issues and get clear guidance on your next steps toward better rest and overall health.

Reviewed for medical accuracy: 07/15/2026

Important Next Steps

Discover if regular sleep-aid use is safe Find likely causes of your sleep trouble Learn if your sleep problems need care See over-the-counter options for better sleep Find doctors for sleep or insomnia Discover home remedies for better sleep Understand if sleep aids are affecting you

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Explanation

Diphenhydramine, a common ingredient in over-the-counter sleep aids, can help people fall asleep. However, using it regularly might not be safe. Research shows that while it can be effective for short-term use, it may cause side effects like dry mouth, dizziness, and confusion, especially in older adults.

Potential Risks

Next-Day Drowsiness: After using diphenhydramine at night, some people may feel sleepy or less alert the next day.
Side Effects: Regular use can lead to unwanted effects such as dry mouth, dizziness, and confusion.

Recommendations

It's best to use these sleep aids only occasionally and not as a regular solution for sleep problems. If you have ongoing trouble sleeping, talking to a healthcare provider is a good idea. They can help find a safer and more effective way to improve your sleep.

If you're experiencing concerning symptoms or side effects, you can check your symptoms with this free AI-powered tool at symptomchecker.ubie.com.

(References)

Almond SM, Warren MJ, Shealy KM, Threatt TB, & Ward ED. (2021). A Systematic Review of the Efficacy and Safety of Over- .... The Senior care pharmacist, 33509331.
Abraham O, Schleiden L, & Albert SM. (2017). Over-the-counter Medications Containing Diphenhydramine .... International journal of clinical pharmacy, 28466395.
Zhang D, Tashiro M, Shibuya K, Okamura N, Funaki Y, Yoshikawa T, et al. (2010). Next-day residual sedative effect after nighttime .... Journal of clinical psychopharmacology, 21105284.

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