Norethindrone is available under the brand name Aygestin [1]. It is also widely known by its generic name, norethindrone [1].
What is norethindrone used for?
Norethindrone is a progestin medication used to treat conditions such as irregular periods, abnormal uterine bleeding, and amenorrhea (absence of menstruation) [1]. It is also used as a component of some hormonal contraceptives [2].
How does norethindrone work?
Norethindrone is a synthetic form of the hormone progesterone [1]. It works by altering the uterine lining, preventing thickening that can lead to abnormal bleeding [1]. In contraceptives, it helps prevent ovulation and thickens cervical mucus, making it harder for sperm to reach an egg [2].
What other medications contain norethindrone?
Norethindrone is often combined with ethinyl estradiol, another hormone, in various birth control pills [2]. Examples of combination products include Lo Loestrin Fe and Junel Fe [2].
When does norethindrone patent protection expire?
Patent information for specific formulations of norethindrone can vary. Information on the patent status and expiration dates for various norethindrone products is available through resources like DrugPatentWatch.com [3].