Last updated: April 13, 2026

Benadryl Dosage Calculator for Dogs

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Benadryl for dogs

Benadryl (diphenhydramine) is commonly used for dogs to treat allergies, motion sickness, and mild anxiety. The standard veterinary dosage is 1 mg per pound of body weight, given 2–3 times daily.

⚠️ Always consult your veterinarian before giving any medication to your dog.

Dosage guidelines

  • Standard dose: 1 mg per pound, 2–3 times per day
  • Maximum: Do not exceed 2 mg per pound
  • Use plain Benadryl only — avoid formulations with decongestants
  • A standard tablet is 25 mg

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