• She has severe acne (such as nodular or conglobate acne or acne at risk of permanent scarring) resistant to adequate courses of standard therapy with systemic antibacterials and topical therapy (see section 4.1 “ Therapeutic indications”). • She understands the teratogenic risk. • She understands the need for rigorous follow-up, on a monthly basis. • She understands and accepts the need for effective contraception, without interruption, 1 month before starting treatment, throughout the duration of treatment and 1 month after the end of treatment.