药物信息为Nortrel™ 7/7/7 (norethindrone and ethinyl estradiol tablets, USP 0.5/0.035 mg, 0.75/0.035 mg, and 1/0.035 mg) (Barr Laboratories Inc.): DESCRIPTION

0.5/0.035 mg, 0.75/0.035 mg, and 1/0.035 mg

(21 Day Regimen) and (28 Day Regimen)

Patients should be counseled that this product does not protect against HIV infection (AIDS) and other sexually transmitted diseases.

COMBINATION ORAL CONTRACEPTIVES:

Each of the following products is a combination oral contraceptive containing the progestational compound norethindrone and the estrogenic compound ethinyl estradiol:

Nortrel™ 7/7/7 (norethindrone and ethinyl estradiol tablets, USP 0.5/0.035 mg, 0.75/0.035 mg, and 1/0.035 mg) (21 Day Regimen and 28 Day Regimen): Each light yellow tablet contains 0.5 mg of norethindrone and 0.035 mg of ethinyl estradiol and the inactive ingredients include D&C yellow #10, lactose monohydrate, magnesium stearate and pregelatinized starch. Each blue tablet contains 0.75 mg of norethindrone and 0.035 mg of ethinyl estradiol and the inactive ingredients include FD&C blue no. 1 (aluminum lake), lactose monohydrate, magnesium stearate and pregelatinized starch. Each peach tablet contains 1 mg of norethindrone and 0.035 mg of ethinyl estradiol and the inactive ingredients include FD&C yellow no. 6 (aluminum lake), lactose monohydrate, magnesium stearate and pregelatinized starch. Each white tablet in the (28) package contains only inert ingredients as follows: lactose monohydrate, magnesium stearate, and pregelatinized starch.

The chemical name for norethindrone is 17-hydroxy-19-nor-17a-pregn-4-en-20-yn-3-one, for ethinyl estradiol is 19-nor-17a -pregna-1,3,5(10)-trien-20-yne-3, 17-diol.

The structural formulas are as follows: