What aspirin strengths (in milligrams) are available over the counter?
Common aspirin tablet strengths in the US include 81 mg (often sold as “low-dose” or “baby aspirin”), 325 mg, and 500 mg, depending on the product and whether it’s intended for heart-related dosing or pain/fever relief.
How many mg of aspirin should I take for pain or fever?
For typical adult pain or fever dosing, many OTC products are sold in the 325 mg or 500 mg strengths. The exact dose depends on the specific label directions for your product (and your age and medical conditions). Check the package instructions on the bottle you have.
How many mg of aspirin is used for “blood thinning” / heart protection?
Low-dose aspirin is commonly 81 mg per tablet. Some patients are directed to take 81 mg daily rather than higher doses, depending on their clinician’s advice.
Is 81 mg the same as 325 mg?
No. 81 mg is a lower dose than 325 mg. They’re used for different purposes (often low-dose for cardiovascular prevention vs. higher doses for pain/fever), and mixing them without following a clinician’s or label’s guidance can change risk and effect.
What if I’m unsure what my bottle contains?
Look for the “mg” number printed on the label (for example, 81 mg, 325 mg, or 500 mg). If you tell me the exact product name or the mg listed on your bottle, I can help interpret what that strength is commonly used for.