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Plan B (the most commonly used form of emergency contraception) is a medication used to prevent pregnancy after sexual intercourse has occurred. It is most effective if used as soon as possible, but can be used up to 5 days after unprotected sex.

Plan B:

When should emergency contraception be used?

Emergency contraception should be used as soon as possible in these cases:

How does emergency contraception work?

Plan B prevents pregnancy by preventing ovulation (the release of the egg by the ovary) from occurring, or secondarily and less likely, it prevents the fertilized egg from attaching to the uterus.

What if I am already pregnant and don’t know it?

If you are already pregnant, emergency contraception will NOT harm the fetus. Plan B can only prevent a pregnancy. It cannot cause a miscarriage.

What else should I know about emergency contraception?

You should not rely on emergency contraception for regular birth control. It does not work as well as other methods of birth control. Plan B does not prevent sexually transmitted infections. Plan B is unlikely to give you any side effects. Rare side effects include mild fatigue, nausea, or dizziness. Older forms of emergency contraception pills contained large amounts of estrogen and caused nausea/vomiting in many women. Plan B contains only progestin. After taking Plan B, your period may be early or late by 7 days. If you do not have a normal period within this time frame, contact the Boynton Health Medical Information Nurse Line (612) 625-7900.

How do I obtain emergency contraception?

Women Ages 17 and Older
Emergency contraception is available without a prescription at any pharmacy, including the Boynton Health Pharmacy. You will need to bring some form of identification that contains your birth date (e.g., driver’s license, passport). Another option is to get emergency contraception online at

Women Under Age 17
You will need a prescription to get emergency contraception. To get a prescription, call the Boynton Health Medical Information Nurse Line (612) 625-7900., 8:00 a.m.–5:00p.m. Monday–Friday. To get a prescription for emergency contraception when Boynton Health is closed try one of these options:

Common Searches

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Boynton's Medical Information Nurse (612) 625-7900
Emergency Contraception Hotline  (Boynton is listed) (Online prescriptions)
The Aurora Center for Advocacy and Education (Sexual Assault–Relationship Violence–Stalking)

Boynton Health

410 Church Street S.E.
Minneapolis, MN, 55455

P: 612-625-8400 | F: 612-625-1434