RESUMO
Anagen effluvium is an abrupt loss of hair in its growing phase due to an event that impairs the mitotic or metabolic activity of the hair follicle. Anagen effluvium is commonly associated with the administration of chemotherapy, radiation, and drugs as well as exposure to toxic chemicals. However, alopecia due to the administration of anti-tuberculosis drugs has rarely been reported in the literature. A 50-year-old female was diagnosed with intestinal tuberculosis and was started on anti-tuberculosis therapy with isoniazid, rifampicin, ethambutol, and pyrazinamide. After starting the treatment, erythematous to brown patches appeared all over her body, which was followed by diffuse hair loss on the scalp and body. Hair examination showed intact inner and outer root sheaths with fully pigmented hair bulbs, and histopathological examination of a scalp biopsy showed vacuolar degeneration in the interfollicular epidermis and perifollicular infiltration of mononuclear cells and eosinophils. The condition was diagnosed as anagen effluvium with drug eruption, and a potent corticosteroid lotion was prescribed for scalp application twice a day. After complete hair loss, the anti-tuberculosis medications were withdrawn, and hair regrowth started 4 months later. Here, we report a rare case of anagen effluvium with generalized drug eruption due to anti-tuberculosis medication.