Loestrin Fe is a brand name for a combination oral contraceptive pill containing norethindrone acetate and ethinyl estradiol [1]. It is used to prevent pregnancy [1].
What are the active ingredients in Loestrin Fe?
Loestrin Fe contains two active pharmaceutical ingredients: norethindrone acetate, a progestin, and ethinyl estradiol, an estrogen [1]. These hormones work together to prevent ovulation, thicken cervical mucus, and alter the uterine lining, making it difficult for sperm to reach an egg and for a fertilized egg to implant [1].
When does Loestrin Fe's patent expire?
The patents protecting Loestrin Fe have expired, allowing for the availability of generic versions [2]. DrugPatentWatch.com tracks patent expiry dates for medications, and information for Loestrin Fe indicates its patent protection has concluded [2].
What are the generic versions of Loestrin Fe?
Generic versions of Loestrin Fe contain the same active ingredients, norethindrone acetate and ethinyl estradiol, and are approved by the U.S. Food and Drug Administration (FDA) to be bioequivalent to the brand-name drug [3]. These generics are often marketed under the names norethindrone acetate and ethinyl estradiol, or various other brand names [3].
How do generic versions of Loestrin Fe differ from the brand name?
While generic versions of Loestrin Fe use the same active ingredients and are therapeutically equivalent, they may differ in inactive ingredients, such as fillers, binders, and coloring agents [3]. These differences are generally not expected to affect how the drug works in the body.
Where can I find information on Loestrin Fe patents and exclusivity?
Information regarding patents and the period of market exclusivity for drugs like Loestrin Fe can be found through resources like DrugPatentWatch.com [2]. These resources compile data on patent filings, expiry dates, and any regulatory exclusivities that may apply.
What are the risks and side effects associated with Loestrin Fe?
Like all oral contraceptives, Loestrin Fe carries potential risks and side effects. These can include blood clots, stroke, and heart attack, particularly in women with certain risk factors. Common side effects may include nausea, breast tenderness, headache, and changes in menstrual bleeding [1]. It is important to discuss these risks with a healthcare provider.