Plan B Side Effects
Generic Name: levonorgestrel
Note: This document contains side effect information about levonorgestrel. Some of the dosage forms listed on this page may not apply to the brand name Plan B.
Some side effects of Plan B may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.
For the Consumer
Applies to levonorgestrel: oral tablet
Other dosage forms:
Along with its needed effects, levonorgestrel (the active ingredient contained in Plan B) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking levonorgestrel:More common
- Heavy or light menstrual bleeding
- Absent missed or irregular menstrual periods
- irregular menstruation
- pain in the pelvis
- stopping of menstrual bleeding
Some side effects of levonorgestrel may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:More common
- Abdominal or stomach pain
- tenderness of the breasts
- unusual tiredness or weakness
For Healthcare Professionals
Applies to levonorgestrel: intrauteral device, oral tablet, subcutaneous implant
Cardiovascular side effects have included hypertension.
Dermatologic side effects have included acne and other skin disorders.
Gastrointestinal side effects have included abdominal pain, nausea, vomiting and diarrhea.
Genitourinary side effects have included leukorrhea, vaginitis, dysmenorrhea, breast pain, abnormal pap smear and decreased libido. Very common adverse reactions (greater than 1 in 10 users) include uterine/vaginal bleeding (including spotting, irregular bleeding, heavy bleeding, oligomenorrhea and amenorrhea) and ovarian cysts.
Nervous system side effects have included headache, dizziness and nervousness.
Respiratory side effects have included upper respiratory infection and sinusitis.
General side effects have included weight gain and fatigue.
Psychiatric side effects have included depression.
Musculoskeletal side effects have included back pain.
Other side effects have included postmarketing reports of device breakage and angioedema.
More about Plan B (levonorgestrel)
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