Daily How Much

Diphenhydramine (Benadryl) is often dosed at 1 mg per pound per dose for dogs, with timing and limits set by a vet.

A 65-lb dog often lands near 60–90 mg diphenhydramine per dose, spaced 8–12 hours, using plain diphenhydramine only.

For many dogs, diphenhydramine is dosed at 1 mg per lb per dose, given every 8–12 hours, with vet approval.

Diphenhydramine is commonly started near 1 mg per pound per 8–12 hours, using plain single-ingredient products and careful measuring.

Most adults use 25–50 mg per dose every 4–6 hours, and stop at 6 doses in 24 hours unless a clinician tells you to do something else.

A typical diphenhydramine dose for dogs is 2–4 mg per kg by mouth every 8–12 hours, yet young puppies need extra caution and vet guidance.

Most adults should stay at 300 mg or less in 24 hours from all diphenhydramine products, unless a clinician sets a different plan.

A typical adult dose of diphenhydramine is 25–50 mg every 4–6 hours, staying within the product’s 24-hour label limit.

For most pregnant adults, diphenhydramine label dosing is 25–50 mg every 4–6 hours, capped at 300 mg per day.

For most adults, a single dose is 25–50 mg by mouth; follow the package limits, and get urgent help fast if you took more than directed.