药物信息为Loestrin 24 Fe (Warner Chilcott (US), LLC): DESCRIPTION

Loestrin^® 24 Fe provides a dosage regimen consisting of 24 white progestogen-estrogen contraceptive tablets and 4 brown ferrous fumarate (placebo) tablets.

Each white tablet contains 1 mg norethindrone acetate and 20 mcg ethinyl estradiol.Each white tablet also contains the following inactive ingredients: acacia, lactose, magnesium stearate, starch, confectioner’s sugar, and talc.

Each brown tablet contains ferrous fumarate, microcrystalline cellulose, magnesium stearate, povidone, sodium starch glycolate, and compressible sugar. The ferrous fumarate tablets do not serve any therapeutic purpose.

The structural formulas for the active hormones are:

Ethinyl Estradiol [19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, (17a)-]

Norethindrone Acetate [19-Norpregn-4-en-20-yn-3-one, 17-(acetyloxy)-, (17a)-]