Vaisanin is the trade name for the generic name Dinogestrel tablets. Prolonged use may cause side effects such as headaches, breast discomfort, depression and acne. Dinogestrel is a derivative of 19-nortestosterone, which has strong progestational and anti-androgenic activity and can shrink the lesions of endometriosis. Therefore, it is commonly used clinically in the treatment of endometriosis. The most common side effects clinically experienced by patients on the drug are headache, breast discomfort, depression and acne. Side effects such as nausea, abdominal pain, sleep disturbances and uterine or vaginal bleeding may also occur. Side effects of the drug Denogestrel Tablets are most common during the first month after starting treatment and gradually decrease as treatment continues. Specific medication should be administered under the supervision of a specialist.