Is topical tranexamic acid safe during pregnancy?

What does the evidence say about topical tranexamic acid during pregnancy?

1. A randomized trial of topical tranexamic acid for melasma explicitly excluded pregnant and nursing women from participation, and four participants who became pregnant during the study were removed from the analysis, meaning the trial generated no pregnancy safety data. 1
2. Topical tranexamic acid works by blocking plasminogen from binding to keratinocytes, which reduces the downstream production of the pigment-stimulating compounds that drive melasma; in trial data it produced comparable melasma improvement to hydroquinone with fewer side effects, and microinjection studies found little to no systemic absorption. 1
3. A literature review comparing oral and topical tranexamic acid for melasma found both effective, with topical use showing meaningful improvement by 4 to 8 weeks and a favorable side-effect profile, but reported no pregnancy-specific safety data or discussion of placental transfer for either form. 2
4. A dermatology review of melasma care options states plainly that neither hydroquinone nor tretinoin should be used during pregnancy, while identifying azelaic acid and niacinamide as safe options for pregnant and breastfeeding patients, giving providers concrete pregnancy-appropriate alternatives when tranexamic acid data is lacking. 3
5. A randomized trial comparing oral and topical tranexamic acid found the topical form achieved roughly a 51 percent reduction in melasma severity scores over 12 weeks with only mild local side effects like redness and dryness, results the researchers described as comparable to the oral form, though this trial also did not include pregnancy safety data. 4

Is topical tranexamic acid safe in each trimester?

• First trimester. Melasma often intensifies now due to rising hormones, but this is also when providers are most cautious about unstudied topical actives, since pregnancy trials for tranexamic acid have consistently excluded participants who are pregnant.
• Second trimester. Same guidance continues. If pigmentation is bothering you, ask your provider about azelaic acid or niacinamide, both specifically noted as appropriate options during pregnancy in dermatology literature, as a stand-in until better data exists.
• Third trimester. Same guidance continues. Diligent sun protection remains the single most evidence-backed way to keep pregnancy-related pigmentation from worsening, regardless of which active ingredients you're using or avoiding.