What are frequent side effects of the progestin releasing intrauterine system (Mirena)?
An altered menstrual bleeding pattern is common after Mirena is inserted This change in the menstrual bleeding pattern is due to the direct action of Levonorgestrel on the endometrium. The duration and volume of menstrual bleeding gradually decreases after the first three to six months. With continued use of Mirena bleeding patterns vary from scanty menstruation in some women to, oligomenorrhea or amenorrhea in others. Hormonal side effects are also common particularly in the first three to six months. The most common side effects reported include headache, breast tenderness, acne, weight change and depression. These side effects do subside over time.
