药物信息为Plan B One-Step (levonorgestrel) tablet, 1.5 mg, for oral use (Duramed Pharmaceuticals, Inc.): 1 INDICATIONS AND USAGE

Plan B^® One-Step is a progestin-only emergency contraceptive indicated for prevention of pregnancy following unprotected intercourse or a known or suspected contraceptive failure. To obtain optimal efficacy, the tablet should be taken as soon as possible within 72 hours of intercourse.

Plan B One-Step is available only by prescription for women younger than age 17 years, and available over the counter for women 17 years and older.

Plan B One-Step is not indicated for routine use as a contraceptive.