Tranexamic acid (topical): uses, strength, evidence, and side effects

At a glance

U.S. status

Cosmetic ingredient

Jobs

Melasma · Post-inflammatory marks · Hydroquinone-free maintenance

Watch for

The oral form is the one with the strongest evidence and real clotting cautions; topical 2–5% is gentler and weaker. Don't confuse the two when reading trial headlines.

Access

Topical products span drugstore to prestige pricing; the molecule is inexpensive. Oral tablets are generic and cheap with a prescription.

Forms and strengths

2–5% serums and creams (cosmetic)
Compounded topical (Rx)
Oral tablets for melasma (Rx, off-label)

How to use it

Topical: once or twice daily under sunscreen for at least 12 weeks; combine with retinoids, azelaic acid, or vitamin C. Oral use is a prescriber decision.

Side effects and cautions

Mild irritation (topical)
Dryness
Oral: headache, GI upset, and rare clotting events

Get advice first if

Oral tranexamic acid is avoided with a history of clots, hormonal contraception in some cases, or clotting disorders. Topical use has no such signal but lacks pregnancy data.

Regulatory status

Topical tranexamic acid is a cosmetic ingredient in the U.S. with no approved skin indication; oral tablets are FDA-approved for heavy menstrual bleeding and used off-label for melasma.

In the trends

The pigment ingredient of the moment, often stacked with everything else; layering more brighteners does not multiply results.

Sources on file

These links support the claims above. Reviewed September 1, 2026. Drug labels link to DailyMed searches so the current label is always one click away.