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Plan B One-Step

Introduction to birth control types and options

If a woman is sexually active and she is fertile — physically able to become pregnant — she needs to ask herself, "Do I want to become pregnant now?" If her answer is "No," she must use some method of birth control (contraception).

If a woman does not want to get pregnant at this point in her life, does she plan to become pregnant in the future? Soon? Much later? Never? Her answers to these questions can determine the method of birth control that she and her male sexual partner use — now and in the future.

There are a number of different ways to describe birth control. Terms include contraception, pregnancy prevention, fertility control, and family planning. But no matter what the process is called, sexually active people can choose from a plethora of methods to reduce the possibility of their becoming pregnant. Nevertheless, no method of birth control av...

Plan B One-Step

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Plan B One-Step
(levonorgestrel) Tablet, 1.5 mg, for Oral Use

DRUG DESCRIPTION

The Plan B One-Step (levonorgestrel tablet) tablet contains 1.5 mg of a single active steroid ingredient, levonorgestrel [18,19-Dinorpregn-4-en-20-yn-3-one-13-ethyl-17-hydroxy-, (17 α)-(-)-], a totally synthetic progestogen. The inactive ingredients are colloidal silicon dioxide, corn starch, lactose monohydrate, magnesium stearate, potato starch, and talc.

Levonorgestrel has a molecular weight of 312.45, and the following structural and molecular formulas:

Plan B One-Step (levonorgestrel)  Structural Formula Illustration

Last reviewed on RxList: 7/30/2009
This monograph has been modified to include the generic and brand name in many instances.

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