LO Ovral (Norgestrel / Ethinyl Estradiol) - Description and Clinical Pharmacology

DESCRIPTION

21 white LO/OVRAL tablets, each containing 0.3 mg of norgestrel (dl -13-beta-ethyl-17-alpha-ethinyl-17-beta-hydroxygon-4-en-3-one), a totally synthetic progestogen, and 0.03 mg of ethinyl estradiol (19-nor-17(alpha)-pregna-1,3,5 (10)-trien-20-yne-3,17-diol), and 7 pink inert tablets. The inactive ingredients present are cellulose, D&C Red 30, lactose, magnesium stearate, and polacrilin potassium.

CLINICAL PHARMACOLOGY

MODE OF ACTION

Combination oral contraceptives act by suppression of gonadotropins. Although the primary mechanism of this action is inhibition of ovulation, other alterations include changes in the cervical mucus (which increase the difficulty of sperm entry into the uterus) and the endometrium (which reduce the likelihood of implantation).