Emergency contraceptive pills contain estrogen, a hormone that could potentially decrease your milk supply or, rarely, make your milk disappear entirely. Still, one-time use isn’t likely to have a huge effect on your supply or your baby.
There haven’t been any long-term studies on the health effects of taking this drug repeatedly, so only use it for its intended purpose: as emergency contraception. Use a reliable form of contraception to avoid such an emergency. Barrier contraceptives (like condoms) are considered safest while breastfeeding. If opting for a hormonal form of birth control, it is best to go with a progestin-only pill (mini-pill) or patch.
Please note: The Bump and the materials and information it contains are not intended to, and do not constitute, medical or other health advice or diagnosis and should not be used as such. You should always consult with a qualified physician or health professional about your specific circumstances.