Which antifertility drug is commonly used as a "morning after" pill for emergency contraception?
Levonorgestrel
Medroxyprogesterone acetate
Norethindrone
Mifepristone
Levonorgestrel is a progestin-only medication that is commonly used as an emergency contraceptive. It works primarily by preventing ovulation, which is the release of an egg from the ovaries. If taken within 72 hours of unprotected intercourse, levonorgestrel emergency contraception can significantly reduce the risk of pregnancy.
Incorrect options
2. Medroxyprogesterone acetate: Medroxyprogesterone acetate is a synthetic progestin that is used for contraception, but it is not commonly used as a "morning after" pill. It is more commonly used as a long-acting injectable contraceptive or as an oral contraceptive.
3. Norethindrone: Norethindrone is a progestin that is used for contraception, but it is also not commonly used as a "morning after" pill. It is more commonly used as an oral contraceptive.
4. Mifepristone: Mifepristone is not an antifertility drug and is not used as a "morning after" pill. It is a medication used for medical abortion and for other medical purposes, such as treating certain hormonal disorders.