Primolut N tablets contain norethisterone acetate as the active ingredient. They are used to treat issues like dysfunctional bleeding, amenorrhea, premenstrual syndrome, and endometriosis. The recommended dosage varies depending on the condition, from 1 tablet taken 1-3 times daily up to 3 tablets daily for 10-14 days. Contraindications include pregnancy, liver disease, diabetes, and blood clotting disorders. Side effects can include changes in menstrual bleeding patterns and headaches.