Diphenhydramine Oral for Allergies
Medically reviewed by a licensed pharmacist · Last reviewed
Reviewed against: FDA OTC Monograph
Dose
25mg by mouth every 4-6 hours, max 150mg/day. Ages 6-11: 12.5mg every 4-6 hours, max 75mg/day. May cause drowsiness; avoid alcohol and driving.
What to watch for
- Sedative use
- Narrow angle glaucoma
- Bph urinary retention
Not for children under 6.
Sources
- FDA OTC Monograph — FDA-OTC-Monograph-Diphenhydramine-21CFR341
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Where to buy
This page is for general education and is not medical advice. It does not replace a consultation with a licensed pharmacist or your clinician. Always read and follow the product label. If symptoms are severe, worsening, or persistent, seek professional care.