Benadryl Dosage Calculator for Dogs
Calculate the safe Benadryl dose for your dog’s weight
Dog Weight (lbs)
Tablet Strength
Is Benadryl Safe for Dogs?
Yes — plain diphenhydramine (Benadryl) is generally considered safe for dogs under veterinary guidance. It is commonly used for allergies, insect stings, motion sickness and mild anxiety. Always consult your vet before administering, especially for dogs with heart disease, glaucoma, prostate issues, or those on other medications.
Benadryl Dosage Guide for Dogs
| Dog Weight | Dose (mg) | 25 mg Tablets |
|---|---|---|
| 10 lbs | 10 mg | 0.4 tablet |
| 25 lbs | 25 mg | 1 tablet |
| 50 lbs | 50 mg | 2 tablets |
| 75 lbs+ | 50 mg (max) | 2 tablets (max) |
What Forms of Benadryl Are Safe for Dogs?
- ✅ Plain diphenhydramine tablets (25 mg or 50 mg)
- ✅ Liquid diphenhydramine (children’s formula, no xylitol)
- ❌ Benadryl-D (contains decongestant pseudoephedrine — toxic to dogs)
- ❌ Products with xylitol — always check ingredients
- ❌ Benadryl with alcohol-based inactive ingredients
FAQs
How much Benadryl can I give my 60 lb dog?
The standard dose is 1 mg per lb, with a maximum of 50 mg per dose. For a 60 lb dog, give 50 mg (the maximum) — 2 standard 25 mg tablets. Do not exceed this even at higher body weights.
How often can I give my dog Benadryl?
Up to 3 times daily — every 8 hours maximum. Never exceed 3 doses in 24 hours. If symptoms persist, contact your vet rather than continuing to dose.
Conclusion
Use our Benadryl dosage calculator for dogs as a starting guide, then confirm the dose with your vet. For routine dog health monitoring, use our dog weight calculator and our dog calorie calculator.