Emergency contraception from Nurx costs as little as $0 with insurance or $45 per pill without insurance.
Most side effects from Levonorgestrel 1.5 mg (generic Plan B One-Step® emergency contraception) last about 24–48 hours. For many people, symptoms are mild and go away on their own as the medication leaves your system. Knowing what’s normal can help you feel more prepared, and it’s always okay to reach out to a provider if your symptoms linger longer than expected.
For emergency contraception, Nurx offers generic Plan B® as an over-the-counter option, as well as a prescription option, Ella®, which can be prescribed after an online consultation.
What are common Plan B® side effects?
Plan B® (or generic Plan B) can cause temporary side effects, but most are manageable and improve quickly. Common symptoms include:
- Nausea
- Abdominal pain or cramping
- Fatigue or tiredness
- Headache
- Dizziness
- Breast tenderness
- Changes to your next period (it might be earlier, later, heavier, or lighter than usual)
- Light spotting between periods
How long do Plan B® side effects typically last?
Most side effects fade within a day or two. Nausea and fatigue are usually strongest in the first 24 hours and then get better. Changes to your menstrual cycle can last longer—your next period might come up to a week early or late, and flow can be lighter or heavier than you’re used to.
Can Plan B® side effects last for days?
They can, but it’s less common. Some people notice breast tenderness or pelvic cramping for 3–5 days, and spotting may last for up to a week. These changes are part of your body’s response to the higher dose of levonorgestrel (the active ingredient in Plan B®) and usually aren’t a cause for concern.
How long does it take for Plan B® to leave your system?
Plan B® is processed by your body fairly quickly. Most of the hormone is gone within 5–7 days. Levonorgestrel has a half-life of about 24–32 hours, meaning your system clears about half the dose each day. While the medication itself leaves your body in under a week, menstrual cycle changes may stick around until your next period.
How can I relieve Plan B® side effects?
There are simple things you can do at home to feel more comfortable:
- Eat small, bland meals or take anti-nausea medicine for nausea
- Use ibuprofen or acetaminophen for cramps and headaches
- Apply a heating pad for lower-abdominal cramping
- Rest and drink plenty of fluids if you’re feeling tired
- Wear a supportive bra if your breasts feel sore
- Keep track of bleeding or spotting to discuss with your provider if needed
Managing persistent Plan B® side effects
If your side effects last longer than a week, or if they feel severe, it’s a good idea to check in with a healthcare provider. While most symptoms are temporary, ongoing issues may point to something else that needs attention.
At Nurx, our providers can answer your questions about Plan B® and help you understand what’s normal for your body. We’re here to guide you through emergency contraception and beyond, so you feel supported every step of the way.
The information provided is not a substitute for professional medical advice, diagnosis, or treatment. You should not rely upon this content for medical advice. If you have any questions or concerns, please talk to a medical professional.
Services not offered in every state. Medications prescribed only if clinically appropriate, based on completion of the required consultation. Individual results may vary.
Ella® (Ulipristal Acetate tablet, 30mg), Rx only, is an emergency contraceptive used to prevent pregnancy up to five days (120 hours) after unprotected sex. Ella® may cause side effects, including headache, nausea, and stomach pain. If you would like to learn more about Ella®, please see the full prescription information here.
Levonorgestrel (generic Plan B®) tablet 1.5 mg, intended to reduce the chance of pregnancy after unprotected sex, may cause side effects, including dizziness, abdominal pain, diarrhea, headache, fatigue, irregular menstruation, breast tenderness, nausea or spotting. If you would like to learn more about Levonorgestrel tablet 1.5 mg, please see product information here.