NCI Drug Dictionary
The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.
- ethinyl estradiol/levonorgestrel
A combination of two steroid sex hormones, an estrogen and a progestin, used for contraceptive purposes. Estradiol, the endogenous counterpart of ethinyl estradiol (EE), is the principal, most potent estrogen hormone produced by the ovaries and is vital to the maintenance of fertility and secondary sexual characteristics in females. Levonorgestrel is a synthetic progestogen. This drug combination prevents or delays ovulation and causes a variety of hormonal changes. Ethinyl estradiol inhibits the release of follicle stimulating hormone (FSH), thus suppressing the development of ovarian follicle; levonorgestrel inhibits the release of luteinizing hormone (LH), thus preventing ovulation. This combination of agents alters the endometrium in such a way as to discourage implantation. Check for active clinical trials using this agent. (NCI Thesaurus)
US brand name: Alesse