Benadryl Dosage Calculator for Cats
Chemistry & BiologyCalculate a weight-based Benadryl (diphenhydramine) dose estimate for cats. Not a substitute for veterinary advice -- always consult your veterinarian before giving any medication.
Estimated Dose
Estimated diphenhydramine dose in milligrams, based on the commonly cited 1 mg per pound of body weight rate.
Liquid Dose (12.5mg/5mL formulation)
4.0
Equivalent liquid dose in milliliters, for a standard 12.5 mg per 5 mL childrens Benadryl formulation.
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Odeh Ahwal0people find this calculator helpful
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Chemistry & Biology calculators
Frequently Asked Questions
Is this a substitute for veterinary advice?
No. You should never give any medication to your cat without consulting your veterinarian first, to avoid serious health complications.
What is the commonly cited dosing rate?
A widely cited rate is approximately 1 milligram of diphenhydramine per pound of body weight, though a veterinarian may recommend a different amount based on your cat specific health history.
What should I check before giving Benadryl to my cat?
Confirm the product contains only diphenhydramine as the active ingredient, avoid gel capsules which can be toxic to cats, and monitor for side effects including hyperexcitability, dry mouth, and sedation. Benadryl may not be effective for a severe allergic reaction (anaphylaxis), which needs urgent veterinary care.
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