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ethinyl estradiol

   Also found in: Medical, Acronyms, Encyclopedia, Wikipedia 0.03 sec.
eth·i·nyl estradiol  (th-nl)
n.
A synthetic estrogen derivative commonly used in oral contraceptive preparations.

[ethinyl, variant of ethynyl, containing an acetylene group : ethyn(e) + -yl.]


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More recently, in the December 2004 issue of EHP, Jon Nash and colleagues showed that long-term laboratory exposure to environmental concentrations of the pharmaceutical ethinyl estradiol caused reproductive failure in zebrafish.
While the Yuzpe regimen of emergency contraception--calling for two doses of oral contraceptives containing ethinyl estradiol and levonorgestrel--remains the standard, different formulations and ways of taking pills after unprotected sex may be equally effective in preventing pregnancy.
Oral contraceptives: Aprepitant, when given once daily for 14 days as a 100-mg capsule with an oral contraceptive containing 35 mcg of ethinyl estradiol and 1 mg of norethindrone, decreased the AUC of ethinyl estradiol by 43%, and decreased the AUC of norethindrone by 8%.
 
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