Low-dose aspirin

Blood thinners

Also known as Bayer, St. Joseph

Low-dose aspirin keeps platelets from sticking together, lowering the chance of clots that cause heart attacks and strokes. If you've had a heart attack, stroke, or stent, it can be genuinely lifesaving. But here's what's changed: for most healthy adults, a daily aspirin "just in case" is no longer recommended — the bleeding risk usually outweighs the benefit. Take it only because your doctor told you to.

How to take it

When

Once a day, at the same time. Coated (enteric) tablets: swallow whole, don't crush or chew.

Food

Take it with food or a full glass of water — it's gentler on your stomach.

Avoid

Never give aspirin to children or teens with a fever or viral illness — it can cause Reye's syndrome, which is life-threatening.

Stopping

If it was prescribed after a heart attack or stent, don't stop on your own — talk to your doctor first. And tell every doctor and dentist you take it daily.

Missed a dose?

Take it as soon as you remember, unless it's close to your next dose — then skip the missed one. Never double up.

Common side effects

Heartburn or stomach upset
Bruising more easily
Small cuts bleeding longer
Nausea

Call a doctor if

Black tarry stools or vomit that looks like coffee grounds — signs of stomach bleeding, get help now
Blood in your urine, or coughing up blood — get help now
A fall or hit to the head, even if you feel fine — get checked right away
Wheezing, hives, or swelling of your face — call emergency services
New ringing in your ears — call your doctor

Educational only. This summary is drawn from public FDA labeling and MedlinePlus and simplified for readability. Your prescription label and your pharmacist always come first — doses and instructions vary from person to person.