Ortho Micronor is a prescription oral contraceptive that contains norethindrone, a type of hormone called progestin. This method of birth control works by changing the lining of a woman's uterus, increasing the thickness of cervical mucus and inhibiting ovulation, which all help reduce the risk a woman will become pregnant after having sexual intercourse. Women should discuss Ortho Micronor side effects with a gynecologist before beginning treatment with this contraceptive.
Menstrual Cycle Changes
The most commonly reported side effect associated with Ortho Micronor is menstrual irregularity, according to RxList. Affected women may notice that their menstrual period arrives earlier or later than usual. Additionally, women can experience irregular vaginal bleeding in between menstrual cycles. Certain women can also develop unusually long menstrual cycles or may not experience a period at all, a side effect called amenorrhea. If these side effects are bothersome, women should discuss their concerns with a doctor.
Upset Stomach
After taking a dose of Ortho Micronor, women can develop upset stomach side effects. Nausea can occur shortly after treatment and most frequently affects women who take this contraceptive on an empty stomach.
Breast Tenderness
Hormonal methods of birth control, such as Ortho Micronor, can cause breast tenderness or discomfort. The breast tissue can feel achy or heavy or may appear unusually swollen, Drugs.com reports. Breast discomfort side effects typically subside with continued use of Ortho Micronor.
Headache or Dizziness
Women taking Ortho Micronor can develop headache pain or dizziness as side effects of treatment, Drugs.com warns. Headache pain is typically mild to moderate, but can interfere with the ability to remain focused during the day. Episodes of dizziness can cause women to appear unbalanced while standing or walking. In most cases, these side effects diminish with recurrent use of this contraceptive. Women who experience migraine or severe headache pain or vision changes while taking Ortho Micronor should contact a doctor immediately.
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