What is Aminocaproic Acid used for?
Last updated September 7, 2026.
**Aminocaproic acid is a prescription medicine used to control or prevent bleeding when the body is breaking clots down faster than it can form them.** Doctors call this class antifibrinolytics, and the sister drug most people have heard of is tranexamic acid. Typical uses include bleeding after heart surgery, dental work in people with hemophilia, bleeding after urinary or prostate procedures, and bleeding caused by clot-dissolving drugs or certain blood cancers. It comes as tablets, a liquid, and an IV infusion, and the schedule is often a larger first dose followed by smaller doses every hour or every few hours. It is not right for every bleed, and it is avoided in some situations such as active clotting inside blood vessels or unexplained bleeding from the upper urinary tract. Keep every dose on time, keep your full medication list current, and tell your care team about any leg swelling, chest pain, or shortness of breath.
What to do
- Ask what it is treating: Have your prescriber name the specific bleeding problem and how long you should stay on the drug.
- Keep the schedule exact: Doses are often hourly or every few hours at first, so set alarms and do not skip or double up.
- Report clot symptoms fast: Call your clinician right away for calf swelling or pain, chest pain, trouble breathing, or sudden weakness or vision change.
- Share your full med list: Estrogen, hormonal birth control, and clotting factor products can raise clot risk when combined with this drug.
- Mention kidney issues: Reduced kidney function usually means a lower dose, so tell your team about kidney disease or dialysis.
- Watch for muscle problems: On longer courses, report new muscle pain or weakness or dark urine, since these can signal muscle injury.
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