most folks use a baby asprin of 81mg, but some use an adult asprin which is 325mg. its not an unusual dose, but you should be aware of the side effects. it can cause tummy upsets, bleeding disorders, and so on. If you are going to be using it on a long term/daily basis, I would reccomend switching it up to a baby asprin, or snapping it in half. Most baby asprins now are safety coated so it dissolves in your gut, not in your tummy and that helps remove some bleeding risk from your tummy.

I hope it helps.