Lo Simpesse (levonorgestrel and ethinyl estradiol tablets USP and ethinyl estradiol tablets USP) provide an oral contraceptive regimen of 84 light pink tablets each containing 0.1 mg levonorgestrel USP and 0.02 mg ethinyl estradiol USP, followed by 7 light blue tablets each containing 0.01 mg ethinyl estradiol USP.
The structural formulas for the active components are:
Levonorgestrel Chemical Structure (Levonorethinyl Str1)
Levonorgestrel is chemically 18,19-Dinorpregn-4-en-20-yn-3-one, 13-ethyl-17-hydroxy-, (17α)-, (-)-.
Ethinyl Estradiol Chemical Structure (Levonorethinyl Str2)
Ethinyl Estradiol is 19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, (17α)-.
Inactive ingredients for the light pink tablets include croscarmellose sodium, FD&C Red #40, lactose monohydrate, magnesium stearate, methylene chloride, microcrystalline cellulose, and povidone.
Inactive ingredients for the light blue tablets include colloidal silicon dioxide, FD&C Blue No. 1, lactose monohydrate, povidone, pregelatinized starch (maize), stearic acid, and vitamin E.