Nortrel 7/7/7 (28 Day Regimen)

NORTREL 7/7/7 (28 DAY REGIMEN)- norethindrone and ethinyl estradiol
Physicians Total Care, Inc.

MARCH 200431090110105

Rx only

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-17α-pregn-4-en-20-yn-3-one, for ethinyl estradiol is 19-nor-17α -pregna-1,3,5(10)-trien-20-yne-3, 17-diol.

The structural formulas are as follows:

Chem structure Norethindrone
(click image for full-size original)

Norethindrone C20 H26 O2 Molecular Weight: 298.43

Chem Structure Ethyinyl Estradiol
(click image for full-size original)

Ethinyl Estradiol C20 H24 O2 Molecular Weight: 296.41

CLINICAL PHARMACOLOGY

COMBINATION ORAL CONTRACEPTIVES

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).

INDICATIONS AND USAGE

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) are indicated for the prevention of pregnancy in women who elect to use this product as a method of contraception.

Oral contraceptives are highly effective. Table I lists the typical accidental pregnancy rates for users of combination oral contraceptives and other methods of contraception. The efficacy of these contraceptive methods, except sterilization, depends upon the reliability with which they are used. Correct and consistent use of methods can result in lower failure rates.

TABLE I: PERCENTAGE OF WOMEN EXPERIENCING AN UNINTENDED PREGNANCY DURING THE FIRST YEAR OF TYPICAL USE AND THE FIRST YEAR OF PERFECT USE OF CONTRACEPTION AND THE PERCENTAGE CONTINUING USE AT THE END OF THE FIRST YEAR. UNITED STATES
Adapted from Hatcher et al., 1998 Ref. #1.
*
With spermicidal cream or jelly.
% of Women Experiencing an Unintended Pregnancy within the First Year of Use % of Women Continuing Use at One Year

Method

Typical Use

Perfect Use

(4)
Chance 85 85
Spermicides 26 6 40
Periodic abstinence 25 63
Calendar 9
Ovulation Method 3
Sympto-Thermal 2
Post-Ovulation 1
Withdrawal 19 4
Cap *
Parous Women 40 26 42
Nulliparous Women 20 9 56
Sponge
Parous Women 40 20 42
Nulliparous Women 20 9 56
Diaphragm * 20 6 56
Condom
Female (Reality) 21 5 56
Male 14 3 61
Pill 5 71
Progestin Only 0.5
Combined 0.1
IUD
Progesterone T 2.0 1.5 81
Copper T380A 0.8 0.6 78
LNg 20 0.1 0.1 81
Depo-Provera 0.3 0.3 70
Norplant and Norplant-2 0.05 0.05 88
Female Sterilization 0.5 0.5 100
Male Sterilization 0.15 0.10 100

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