Loestrin is a brand name for a combination birth control pill that contains ethinyl estradiol and norethindrone. While Loestrin is the most common name used for this medication, it is also sold under other brand names such as Microgestin, Estrostep, Junel, and Gildess. These are all different brand names for the same type of birth control pill that contains the same active ingredients as Loestrin. Additionally, there are other types of birth control pills that contain different combinations of hormones that can provide similar benefits as Loestrin or its synonyms. It is important to consult with a healthcare provider to determine the best birth control pill for individual needs.