Category: topical
Aliases: TXA topical, Lysteda (oral), topical use off-label
Synthetic lysine analog — competitively inhibits plasminogen binding to lysine residues → blocks plasmin activation. Anti-fibrinolytic (approved in menorrhagia, trauma bleeding). Topical/oral melasma effect proposed via inhibition of plasmin-mediated keratinocyte-driven melanocyte stimulation.