Get detailed information on Diphenhydramine ... PO- Adult- The recommended dose is 25 mg to 50 mg (1 to 2 capsules). Child- The recommended dose is 12.5 mg to 25 mg (1 capsule).

If you want to try over-the-counter Benadryl, the best form is usually a tablet, which is typically 25 mg per tab ... you may need to use a lower-dose liquid children's formula to get the proper ...