Norethisterone 5mg dosage depends on the condition being treated. For delaying periods, the standard dose is usually one tablet three times daily, starting three days before your expected period. For heavy menstrual bleeding, it is typically taken two to three times daily for 10 to 14 days. For short-term issues, it is used for just a few days. For conditions like endometriosis, it can be safely taken for 4 to 6 months under strict medical supervision. Long-term use beyond 6 months is generally not recommended without a doctor's re-evaluation to ensure your safety. Please consult your gynecologist for a personalized plan.