药物信息为LEVLITE 28 Tablets (levonorgestrel and ethinyl estradiol tablets, USP): DESCRIPTION

Each cycle of LEVLITE^® 28 (levonorgestrel and ethinyl estradiol tablets, USP) consists of 21 pink active tablets each containing 0.100 mg levonorgestrel and 0.020 mg ethinyl estradiol; and seven white tablets—inert. The inactive ingredients are Calcium Carbonate USP, Corn Starch NF, Ferric Oxide/red/E 172 NF, Ferric Oxide/yellow/E 172 NF, Glycerin 85% Ph. Eur./DAB, Lactose Monohydrate NF, Magnesium Stearate NF, Montanglycol Wax (Wax E) DAB, Polyethylene glycol 6,000 NF, Povidone 25,000 USP, Povidone 700,000 USP, Pregelatinized Starch NF (Modified Starch), Sucrose NF, Talc USP and Titanium Dioxide, E 171 USP.

Levonorgestrel has a molecular weight of 312.4 and a molecular formula of C₂₁H₂₈O₂. Ethinyl estradiol has a molecular weight of 296.4 and a molecular formula of C₂₀H₂₄O₂. The structural formulas are as follows: