Plan B® Prescribers: How Plan B® Works

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There are many misconceptions about emergency contraception, so it's important for your patients to know that Plan B^® works similar to regular birth control pills; it simply contains a larger dose of the hormone levonorgestrel. Plan B^® is believed to work by:

Preventing ovulation
Possibly preventing fertilization by altering tubal transport of sperm and/or egg
Altering the endometrium, which may inhibit implantation

Plan B^® is not effective once the process of implantation has begun. It will not affect an existing pregnancy or harm a developing fetus.

Plan B^® should be taken as soon as possible. When taken as directed, within 72 hours after unprotected intercourse, Plan B^® can reduce the chance of pregnancy by up to 89%.¹

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Important Safety Information:

For more information about Plan B^®, call 1-800-330-1271

Important Safety Information: Plan B^® is indicated to prevent pregnancy following unprotected intercourse or contraceptive failure. Plan B^® is contraindicated in women with known or suspected pregnancy, hypersensitivity to any component of the product. Plan B^® is not recommended for routine use as a contraceptive, because it isn't as effective. Plan B^® is not effective in terminating an existing pregnancy. Plan B^® does not protect against HIV infection and other sexually transmitted infections (STIs). Menstrual bleeding may be heavier or lighter, earlier or later after taking Plan B^®. If menses is delayed beyond one week, the patient may be pregnant. Severe abdominal pain may signal a tubal (ectopic) pregnancy. Common side effects associated with the use of Plan B^® include nausea, abdominal pain, fatigue, headache, menstrual changes, dizziness, breast tenderness, vomiting, and diarrhea.

Your patients are encouraged to report any negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch or call 1-800-FDA-1088.