Dienonorm 2 mg Tablet is used to treat endometriosis. It contains Dienogest which suppresses the production of a hormone (oestradiol) that causes excess growth in the endometrium. In some cases, this medicine may cause side effects such as acne, headache, abdominal pain, nausea, and vomiting. Before taking this medicine, inform the doctor if you are pregnant or breastfeeding, taking any other medication, or have any pre-existing medical conditions.