How Does Loestrin 24 Fe Work?

In 2013, the manufacturer of Loestrin 24 Fe decided to stop making this medication and replace it with Minastrin™ 24 Fe, which comes in exactly the same strengths but is chewable. 
Women often turn to oral contraceptives -- also called birth control pills or just "the pill" -- because they are easy to use and generally quite effective, with few (if any) side effects. Loestrin® 24 Fe (norethindrone/ethinyl estradiol) is a combined oral contraceptive, which means it contains two different hormones: an estrogen and a progestin.
Loestrin 24 Fe works to prevent pregnancy in a few different ways. It stops ovulation (the maturation and release of eggs from the ovaries) and also produces certain changes in the cervical mucus and in the endometrium (the lining of the uterus). Women often experience lighter, shorter periods while taking this drug.
For this medication to work properly, Loestrin 24 Fe must be taken every day, at the same time each day. Missing doses greatly increases your risk of pregnancy. If you are having trouble remembering to take the daily dose, talk to your healthcare provider about other birth control options.
(Click Loestrin 24 Fe to learn more about this product, including possible side effects, what to discuss with the healthcare provider recommending it, and what to do if you miss any doses.)
Last reviewed by: Kristi Monson, PharmD
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