Each Levonest™ (Levonorgestrel and Ethinyl Estradiol tablets—Triphasic Regimen) cycle of 28 tablets consists of three different drug phases as follows: Phase 1 comprised of 6 yellow tablets, each containing 0.050 mg of levonorgestrel (d(-)-13 beta-ethyl-17-alpha-ethinyl-17-beta-hydroxygon-4-en-3-one), a totally synthetic progestogen, and 0.030 mg of ethinyl estradiol (19-nor-17α-pregna-1,3,5(10)-trien-20-yne-3, 17-diol); phase 2 comprised of 5 green tablets, each containing 0.075 mg levonorgestrel and 0.040 mg ethinyl estradiol; and phase 3 comprised of 10 light brown tablets, each containing 0.125 mg levonorgestrel and 0.030 mg ethinyl estradiol; then followed by 7 white inert tablets. The inactive ingredients present in the yellow, green and light brown tablets are lactose, magnesium stearate and pregelatinized corn starch.
Levonest is a hormone medication found in the contraceptives drug class. The drug is mostly used to prevent pregnancy but can be used for other medicinal purposes. Levonest contains two hormones; estrogen and progestin. Levonest works by preventing the release of an ovum during the menstrual cycle, hence, preventing any fertilization and pregnancy.