药物信息为WATSONPHARMA IN-5220/S PHYSICIAN LABELINGTri-Norinyl (Norethindrone and Ethinyl Estradiol Tablets USP) Rx only (Watson Pharma, Inc.): DESCRIPTION

Tri-Norinyl^® provides a continuous oral contraceptive regimen of 7 blue tablets, 9 yellow-green tablets, 5 more blue tablets, and then 7 orange tablets. Each blue tablet contains norethindrone 0.5 mg and ethinyl estradiol 0.035 mg, each yellow-green tablet contains norethindrone 1 mg and ethinyl estradiol 0.035 mg, and each orange tablet contains inert ingredients.

Norethindrone is a potent progestational agent with the chemical name 17-Hydroxy-19-nor-17α-pregn-4-en-20-yn-3-one. Ethinyl estradiol is an estrogen with the chemical name 19-Nor-17α-pregna-1,3,5 (10)-trien-20-yne-3,17-diol. Their structural formulae follow.

The yellow-green TRI-NORINYL tablets contain the following inactive ingredients: D&C Green No. 5, D&C Yellow No. 10, lactose, magnesium stearate, povidone, and starch.

The blue TRI-NORINYL tablets contain the following inactive ingredients: FD&C Blue No. 1, lactose, magnesium stearate, povidone, and starch.

The inactive orange tablets in the 28-day regimen contain the following inactive ingredients: FD&C Yellow No. 6, lactose, microcrystalline cellulose, and magnesium stearate.