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Concept
Norgestimate
Summary
Norgestimate, sold under the brand names Ortho Tri-Cyclen and Previfem among others, is a progestin medication which is used in birth control pills for women and in menopausal hormone therapy. The medication is available in combination with an estrogen and is not available alone. It is taken by mouth.
Side effects of the combination of an estrogen and norgestimate include menstrual irregularities, headaches, nausea, abdominal pain, breast tenderness, mood changes, and others. Norgestimate is a progestin, or a synthetic progestogen, and hence is an agonist of the progesterone receptor, the biological target of progestogens like progesterone. It has very weak androgenic activity and no other important hormonal activity. The medication is a prodrug of norelgestromin and to a lesser extent of levonorgestrel in the body.
Norgestimate was patented in 1965 and introduced for medical use, specifically in birth control pills, in 1986. It was introduced for use in menopausal hormone therapy in the United States in 1999. Norgestimate is sometimes referred to as a "third-generation" progestin. It is marketed in birth control pills widely throughout the world, whereas it is available for use in menopausal hormone therapy only in the United States and Brazil. Norgestimate is available as a generic medication. In 2020, the version with ethinylestradiol was the 63rd most commonly prescribed medication in the United States, with more than 10 million prescriptions.
Norgestimate is used in hormonal contraception and in menopausal hormone therapy for the treatment of menopausal symptoms. It is used in combination with ethinylestradiol in birth control pills and in combination with estradiol in menopausal hormone therapy.
Norgestimate is available only in combination with the estrogens ethinylestradiol and estradiol. These formulations are for use by mouth and are indicated specifically for hormonal contraception and menopausal hormone therapy. Norgestimate is not available on its own (i.e., as a standalone medication).
Official source
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