Most people who take Norethisterone do not experience side effects. But if you do experience any, you should speak to your doctor. The most commonly reported side effects - which are still rare, however - are associated with an allergic reaction: Facial swelling, increased blood pressure, jaundice (yellowing of the skin) and blood clots. An allergic reaction could lead to death, so it is important to seek medical attention if you experience any side effects.
Other side effects include: dizziness, nausea, headaches, sex drive changes, breast tenderness, ovarian cysts, mood changes, drowsiness and changes in vision.
Most healthy women will be able to take Norethisterone, however there are certain medical conditions that may exclude you from the treatment. If you have high blood pressure, hormonal imbalances, varicose veins, heart problems, asthma, kidney problems or risk of blood clots, you may not be able to take this drug. Norethisterone can increase your risk of blood clots, so if you are already at an increased risk of blood clots (if you smoke or have high blood pressure, for example), you will not be prescribed Norethisterone. A family history of breast cancer or a prior diagnosis of depression, may also prevent you from taking Norethisterone. If you are prevented from taking Norethisterone due to one of the above conditions, there may be alternative ways available to delay your period.