See the DrugPatentWatch profile for Norethindrone
Norethindrone is also known by several other names, including norethisterone and its various brand names [1]. It is a synthetic progestogen used in various medical applications [1].
What are the common brand names for Norethindrone?
Norethindrone is marketed under numerous brand names, often in combination with estrogen [1]. Some common brand names include Aygestin, Camila, Errin, Garpiva, Heather, Norlyda, Nor-Qd, Ortho-Novum, Ovcon, Plan B One-Step, Relacon, Sronyx, Tri-Norinyl, and Xulane [1]. The specific brand name can depend on the dosage, formulation, and whether it is combined with other active ingredients [1].
How is Norethindrone used medically?
Norethindrone is primarily used for hormonal contraception, to treat menstrual irregularities, and to manage symptoms associated with endometriosis and uterine fibroids [1]. It is available in various forms, including oral tablets, injections, and intrauterine devices (IUDs) [1].
When does the patent for Norethindrone expire?
Norethindrone is a long-established medication, and its original patents have long expired [2]. However, patents for specific formulations, delivery methods, or combinations with other drugs may still be active [2]. DrugPatentWatch.com provides detailed information on drug patents and exclusivity periods [2].
What is the difference between Norethindrone and other progestins?
Norethindrone is a first-generation progestin, distinct from newer generations of synthetic progestins such as levonorgestrel, norgestimate, and drospirenone [1]. These different progestins can have varying hormonal profiles, receptor affinities, and side effect profiles [1]. For example, some newer progestins may offer improved contraceptive efficacy or different effects on acne or fluid retention [1].