Plan B (emergency contraception) should be taken as soon as possible after unprotected sex or if the primary birth control method failed. It is most effective when taken within 72 hours (3 days) after unprotected sex, but it can be taken up to 120 hours (5 days) after, with decreasing effectiveness over time. The earlier it is taken, the better it works to prevent pregnancy. It is not meant to be used as a regular form of birth control but as an emergency option. Taking it with or without food is fine, and it can be used while breastfeeding. If vomiting occurs within 2 to 3 hours of taking it, another dose may be needed. Key points:
- Take Plan B within 72 hours (3 days) after unprotected sex for best effectiveness.
- It can be taken up to 120 hours (5 days) but is less effective after 72 hours.
- The sooner it is taken after unprotected sex, the better.
- Use Plan B if no birth control was used, birth control failed, or pills were missed.
- It is a single pill taken orally.
- If vomiting occurs shortly after taking, a second dose may be necessary.
- Not for regular birth control use.
This information helps prevent an unwanted pregnancy by delaying or preventing ovulation after sex.
