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🐶 Benadryl Dosage for Dogs (Diphenhydramine)

Default clinic rule of thumb: 1 mg/lb (≈ 2.2 mg/kg). Liquid example: 12.5 mg/5 mL. Dose every 8–12 hours (max 2–3×/day).
Educational tool — not a substitute for veterinary advice. Use diphenhydramine-only products; check contraindications (e.g., pregnancy, glaucoma, severe heart disease).
⚙️ Inputs

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📊 Quick view
Dose by weight
Liquid (12.5 mg/5 mL)
FrequencyEvery 8–12 h
🧾 Detailed outputs
Benadryl dose (mg) Liquid volume (mL)
12.5 mg/5 mL → 2.5 mg/mL
25 mg tablets (count) 12.5 mg chewables (count)

Rounding tablets is approximate. Always confirm with your vet before splitting/rounding.

🧮 Step-by-step derivation (click to expand)
📚 References
  • General veterinary caution: use diphenhydramine-only products; confirm dose with your veterinarian.