Usual Dose and Administration Follow your veterinarians recommendations. Treatment should only be needed for 1-2 days. If diarrhea persists or worsens, contact your veterinarian. Treatment should only be needed for 1-2 days. If diarrhea persists or worsens, contact your veterinarian.
Salicylates can be fatal to cats.
Bismuth subsalicylate should NOT be given to cats except under direct supervision by your veterinarian. Side Effects Tongue color may darken temporarily. Stool may turn a gray-black or greenish color during treatment. In humans, it has caused constipation. Use with caution in animals with bleeding problems like VonWillebrand's disease.