If you want aspirin in that dose range for long term anticoagulation (blood thinning to help prevent heart attacks) in the USA the dose standard for an adult is 81mg per day. This is readily sold in most pharmacies, without a perscription.
In addition, in the USA, one baby aspirin (Like the orange flavored chewable ones) is equal to 81 mg. We (Nurses)frequently advise our adult patients to take ONE baby aspirin a day, if they have been prescribed by a doctor to take daily aspirin.
Acetaminophen will NOT achieve the same results.
DO NOT take, or give aspirin in any dose, to anyone who is allergic to it, it can cause stroke,or death.
It is not advisable to take/give daily aspirin without a doctor's specific instruction.