Plan B One-Step Side Effects

Common side effects of Plan B One-Step morning-after pill are listed below. Call your doctor if these side effects are severe or persist after a few days.

• Nausea
• Vomiting
• Diarrhea
• Headache
• Dizziness 
• Fatigue
• Tender breasts
• Spotting between menstrual periods
• Lighter or heavier bleeding in the next menstrual cycle

Rarely, Plan B One-Step can cause more serious side effects. Seek immediate medical attention if you develop the following symptoms:

• Severe lower abdominal pain (this can occur 3 to 5 weeks after taking Plan B One-Step)

The above list may not include all the potential adverse effects of Plan B One-Step. Contact your healthcare professional if your side effects are unusual or severe or they do not get better over time. You can also report unusual side effects to the Food and Drug Administration at 1-800-FDA-1088.

Plan B One-Step Overdose: In case of an overdose of Plan B One-Step, call your doctor immediately. You can also call the local poison control center or national poison control center at 1-800-222-1222. If a person cannot be awakened, has trouble breathing, has collapsed, or has had a seizure, call 911. Symptoms of an overdose may include nausea and vomiting.

Source: FDA