In 1997, the FDA approved a prescription emergency contraception pill (known as the morning-after pill), which became available over the counter in 2006.Levonorgestrel (Plan B) was approved, by prescription, in 1999.Ebadi, Manuchair, "Levonorgestrel", in "Desk Reference of Clinical Pharmacology", CRC Press, 2007, p. 338, ISBN 978-1-4200-4743-1.Updated FDA Action on Plan B (levonorgestrel) Tablets (press release).