Key Takeaways:
- Safe for Most Nursing Moms: Plan B is considered safe with breastfeeding, and nursing doesn’t need to be interrupted. Levonorgestrel, the active ingredient, reaches breast milk only in small amounts, so most moms can take it without pausing their feeding routine.
- Side Effects Are Typically Temporary: You may notice temporary changes like nausea, fatigue, headache, breast tenderness, or shifts in your menstrual cycle after taking Plan B. These effects are generally short-lived and tend to ease within a few days.
- Your Healthcare Provider Has Answers: A healthcare provider can address medication interactions, unusual symptoms, and contraception choices based on your individual needs.
Needing emergency contraception while breastfeeding can bring up real concerns about your milk, your baby, and what to do next. Having clear, reliable answers helps when you're in the middle of the postpartum season, giving your all to care for everyone, yourself included.
At Simple Wishes, we’re moms designing thoughtfully made nursing and pumping essentials that help mothers feel comfortable, supported, and more like themselves through feeding, pumping, and everyday postpartum life.
In this piece, we’ll discuss whether you can take Plan B while breastfeeding, how it may affect you and nursing, and what to know before taking it.
Is Plan B Safe While Breastfeeding?
Most nursing moms find that Plan B is safe while breastfeeding. The active ingredient, levonorgestrel, passes into breast milk in small amounts and does not affect milk supply or production, so you can feel reassured on that front.
Additionally, taking Plan B while breastfeeding doesn’t require pausing nursing or discarding your milk. Having other medications or specific health concerns is a good reason to loop in a healthcare professional, who can help you decide what makes the most sense for your situation.
How Plan B Works After Having A Baby
Plan B is an emergency contraceptive that contains levonorgestrel, a hormone that primarily works by delaying or preventing ovulation. It is intended for use after unprotected sex or when another birth control method fails. Taking it as soon as possible gives it the best chance to work.
After giving birth, ovulation can return before your first period, including while you are nursing. This means Plan B may be an option when you have resumed sexual activity and need additional protection.
Do note that Plan B doesn’t end an established pregnancy and is not a substitute for regular birth control. A healthcare provider can help you find an ongoing contraception method that fits your postpartum needs and feeding plans.
Side Effects Plan B While Breastfeeding
Side effects can vary from person to person. Knowing what you may experience helps you care for yourself comfortably while continuing your usual routine. Here's what to expect from the side effects of Plan B while breastfeeding:
- Changes to Your Period: Your next period may arrive earlier or later than expected, with a lighter or heavier flow than usual. Tracking any changes can help you keep tabs on what has shifted and know what to expect.
- Nausea or Stomach Discomfort: Temporary nausea or abdominal discomfort may occur. Staying hydrated and eating small, gentle meals may help ease the feeling. Bland snacks like crackers or ginger tea tend to be easy on the stomach during this time.
- Headache or Dizziness: A headache or mild dizziness may develop, making rest and support with daily tasks helpful while the symptoms pass.
- Breast Tenderness: If your breasts feel tender, soft maternity nursing bras and comfortable nursing tops can reduce pressure while keeping feeding access convenient.
- Tiredness: Fatigue can occur after taking Plan B and may feel more noticeable alongside postpartum recovery and frequent feedings. Keeping snacks nearby, staying hydrated, and accepting help where you can are small ways to take care of yourself as your body adjusts.
How Long After Taking Plan B Can I Resume Breastfeeding?
You can generally continue breastfeeding after taking Plan B without waiting or discarding your milk. Levonorgestrel is considered compatible with breastfeeding, so interrupting your usual feeding schedule is typically unnecessary. This can be reassuring when your baby relies on regular nursing sessions.
As you continue your feeding routine, comfortable maternity nursing bras or a nursing and pumping bra can provide support and convenient access throughout the day. Pumping sports bras can also be practical for moms who want hands-free pumping support while staying active. If you have individual medical concerns, ask your healthcare provider or pharmacist for personalized guidance.
When To Talk With A Healthcare Provider
Call your healthcare provider if you experience severe abdominal pain, very heavy bleeding, or symptoms that feel unusual after taking Plan B. Reaching out for personalized guidance is also a good move if you take certain medications or have questions about emergency contraception during the postpartum period. Getting advice shaped around your specific health history puts you in the best position to care for yourself and your baby with confidence.
Final Thoughts
Needing Plan B while breastfeeding can feel like one more thing to think about during an already full season of caring for your baby, but you can feel reassured that it is generally considered compatible with nursing. Taking care of your reproductive health matters, too, and you should feel supported in making the choice that feels right for you. Still unsure? A conversation with your healthcare provider can help you feel supported and comfortable with your next step.
Frequently Asked Questions About Taking Plan B While Breastfeeding
Can breastfeeding prevent the need for emergency contraception?
Breastfeeding may delay ovulation under specific conditions, but its effectiveness as contraception depends on feeding patterns and the time since birth.
Does body weight affect how well Plan B works?
Plan B may be less effective at higher body weights, so a healthcare provider can help you consider suitable emergency contraception options.
Can I use Plan B more than once while nursing?
Plan B can be used more than once if needed, although it is intended for emergency rather than routine contraception.
What should I do if I vomit after taking Plan B?
If you vomit within two hours of taking Plan B, contact a healthcare provider or pharmacist to ask if another dose is needed.
Can Plan B be taken with food?
Plan B can be taken with or without food, so you can choose what feels most comfortable for you.
Are there alternatives to Plan B for breastfeeding mothers?
Other emergency contraception options are available, and a healthcare provider can help you choose one that suits your needs while nursing.
Can medications make Plan B less effective?
Certain medications and herbal products can reduce the effectiveness of Plan B, so share what you take with your healthcare provider or pharmacist.
Can I take Plan B at any time of day?
Plan B can be taken at any time of day, with how soon you take it after unprotected sex being more important than the hour.
Does Plan B work during ovulation?
Plan B mainly delays ovulation, so it may not be as effective if ovulation has already occurred.
How should Plan B be stored at home?
Plan B should be kept at room temperature in its original packaging and stored away from excess heat, moisture, and children.
Disclaimer: This content is not intended to be a substitute for professional medical advice or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.
Sources:
- Plan B One Step. (n.d.). FAQs. https://www.planbonestep.com/faqs/
- Cadence OTC. (n.d.). Safety while breastfeeding. https://cadenceotc.com/blogs/learn-share/safety-while-breastfeeding



