Benadryl Allergy Ultratab (Diphenhydramine 25mg)
Benadryl$12.99
✓Generic Worth ItSave 31%
70%confidence
371votes
✓Verified Apr 2026
Generic Alternative
Kirkland Signature Allergy Medicine (Diphenhydramine 25mg)
Kirkland Signature
Costco
$8.99260
Same Quality
74
Close Enough
37
Not Worth It
Evidence (1)
Ingredients✓ Confirmedby adminApr 6, 2026
Kirkland Signature Allergy Medicine contains diphenhydramine 25mg, identical to Benadryl Allergy. Diphenhydramine is an off-patent drug; FDA-approved generics are required to be bioequivalent. Manufactured by Perrigo. One of the best-known examples of overpaying for a name brand.
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