Can I Give My Cat Benadryl?
Yes, with care
Diphenhydramine is commonly referenced for cats at published doses. The published veterinary reference range for diphenhydramine in cats is 1-2 mg per kg of body weight, given every 8-12h. In practice: 2-4 mg total per cat. Bitter; cats foam/drool at the taste. Paradoxical excitement possible.
Source: Merck Veterinary Manual
Skip it or ask a vet first if
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The safe habit
Confirm any medication decision with your veterinarian, who knows your cat's health history and other medications. VetDose shows published reference data, not prescriptions.