RT Journal Article T1 Azathioprine-induced alopecia: a rare adverse event, early marker of myelotoxicity. A1 Vázquez Rodríguez, Juan Antonio A1 Merino Gallego, Esther A1 Baños Arévalo, Antonio José A1 Gallardo Sánchez, Francisco A1 Miras Lucas, Leticia A1 Pérez González, Álvaro AB Though not exempt from adverse events, azathioprine (AZA) is an inexpensive and effective drug in the induction and maintenance treatment of patients with inflammatory bowel disease. We present the case of a 20-year-old female patient with left-side ulcerative colitis in whom AZA was started at a dose of 1.5 mg/kg/day due to dependence on corticoids (thiopurine methyltransferase activity: 14.9 U/mL). Two weeks after starting treatment she began to report excessive hair loss, resulting in an almost complete loss of scalp hair. SN 1130-0108 YR 2022 FD 2022 LK http://hdl.handle.net/10668/21713 UL http://hdl.handle.net/10668/21713 LA en DS RISalud RD Apr 6, 2025