How long is plan b good for after expiration date?

Plan B, or emergency contraception, is most effective when taken as soon as possible after unprotected intercourse, ideally within 72 hours. While it may still be effective shortly after the expiration date, the manufacturer does not guarantee its efficacy past this point. Generally, it's recommended not to use any medication beyond its expiration date to ensure safety and effectiveness. If in doubt, consult a healthcare professional for guidance.