Can I Give My Dog Pepto-Bismol?

Yes, with care
Bismuth subsalicylate is commonly referenced for dogs at published doses. Published guidance for dogs: 1 tsp (5 mL) per 10 lb, every 8h, max 2 days. Contains a salicylate (aspirin relative). Short courses only; black stools expected (can mask GI-bleed signs). Skip if on other NSAIDs or steroids.
Source: Merck Veterinary Manual
Get the exact range for your dog's weight

Skip it or ask a vet first if

cats, neverdogs on NSAIDs/steroidsbleeding disorderspregnant animals

The safe habit

Confirm any medication decision with your veterinarian, who knows your dog's health history and other medications. VetDose shows published reference data, not prescriptions.

See also

Other GI questions for dogs