How much aspirin do you give your 120 pound dog with arthritis?

You DON'T give your animal any human medication not prescribed by a vet it could kill them.

AnswerI agree wholeheartedly with the above answer, but there are cases in which your vet may PRESCRIBE a low dose of aspirin for your dog. Certain dosages are toxic to dogs. So you must get a vet's advice and not try to decide for yourself what dosage is safe for your dog. AnswerMost vets would recommend 5mg to 10mg per pound of the dog's weight, or about 10-20mg per kg weight.

However dogs taking aspirin for chronic pain relief must have a physical examination, and blood and urine testing done every 2 to 3 months to monitor for side effects.