What dose of prednisone can i safely give my St. Bernard which weighs in at 85 pounds and is having an allergic reaction to distemper vaccine?

I’m not a veterinarian, but for an 85-pound St. Bernard experiencing an allergic reaction, a common prednisone dosage might range from 0.5 to 1 mg per pound of body weight, administered once daily. However, the exact dosage and duration should be determined by a veterinarian, who can assess the severity of the reaction and any other medical considerations. It's crucial to consult your vet before administering any medication to ensure the safety and health of your dog.