Management of Dysmenorrhea with Norethisterone

Dosing Regimens

The minimum effective dose of 1 mg oral norethisterone daily is recommended when used continuously for dysmenorrhea management, particularly when withdrawal bleeding is not desired 1
A standard therapeutic dose of 5 mg daily is commonly prescribed for symptom management in continuous regimens, allowing for endometrial protection 1
The sequential/cyclical regimen of 5 mg twice daily on days 19-26 of the menstrual cycle provides controlled withdrawal bleeding while offering symptom relief 1

Norethisterone reduces menstrual pain by thinning the endometrial lining, resulting in decreased prostaglandin production, and providing endometrial protection when used in appropriate doses 1, 2

Continuous regimens require a minimum of 1 mg of oral norethisterone daily for endometrial protection 1
Progestins like norethisterone should not be used for more than 6 months continuously due to the potential risk of meningioma, and may have a nonsignificant association with thromboembolism risk at higher doses 3
Consider medroxyprogesterone acetate as an alternative in patients with a high risk of venous embolism 3

Changes in mood and breast tenderness are potential side effects of norethisterone treatment 1

Progestational agents like norethisterone are preferred over combined oral contraceptives for menstrual suppression during thrombocytopenic periods 3
Adjust dosage based on individual response and tolerability 1