title: Ethinyl estradiol in peripheral plasma after oral administration of 30 microgram and 50 microgram to women.
abstract: Plasma levels of ethinyl estradiol were measured by radioimmunoassay in five women after oral administration of 30 microgram and of 50 microgram of ethinyl estradiol. Peak levels of ethinyl estradiol were mostly observed within two hours after the tablet intake. The peak concentrations found were 50--90 pg and 95--135 pg for the two doses administered. Twenty-four hours after the administration of the tablets, the plasma concentration of ethinyl estradiol did not exceed the plasma blank values (25 pg/ml) in most women.
mesh_terms: D000284:Administration, Oral; D004305:Dose-Response Relationship, Drug; D004997:Ethinyl Estradiol / Q000008:administration & dosage / Q000097:blood*; D005260:Female; D006801:Humans; D013997:Time Factors
chemical_list: D004997:Ethinyl Estradiol