Nortrel 28 Day
NORTREL 28 DAY- norethindrone and ethinyl estradiol
A-S Medication Solutions
WARNING: CARDIOVASCULAR RISK ASSOCIATED WITH SMOKING
Cigarette smoking increases the risk of serious cardiovascular events from combination oral contraceptive use. This risk increases with age, particularly in women over 35 years of age, and with the number of cigarettes smoked. For this reason, combination oral contraceptives, including Nortrel® 0.5/35 and 1/35, should not be used by women who are over 35 years of age and smoke.
Patients should be counseled that this product does not protect against HIV infection (AIDS) and other sexually transmitted diseases.
COMBINED ORAL CONTRACEPTIVES
Each of the following products is a combination oral contraceptive containing the progestational compound norethindrone and the estrogenic compound ethinyl estradiol:
Nortrel® 1/35 Tablets:
Each yellow tablet contains 1 mg of norethindrone, USP and 0.035 mg of ethinyl estradiol, USP, and the inactive ingredients include D&C yellow no. 10 aluminum lake, lactose monohydrate, magnesium stearate and pregelatinized corn starch. Each white tablet in the 1/35 package contains only inert ingredients as follows: lactose monohydrate, magnesium stearate, and pregelatinized corn starch.
Nortrel® 0.5/35 Tablets:
Each light yellow tablet contains 0.5 mg of norethindrone, USP and 0.035 mg of ethinyl estradiol, USP, and the inactive ingredients include D&C yellow no. 10 aluminum lake, lactose monohydrate, magnesium stearate and pregelatinized corn starch. Each white tablet in the 0.5/35 package contains only inert ingredients as follows: lactose monohydrate, magnesium stearate, and pregelatinized corn starch.
The chemical name for norethindrone, USP is 17-Hydroxy-19-nor-17α-pregn-4-en-20-yn-3-one, for ethinyl estradiol, USP is 19-Nor-17α-pregna-1,3,5(10)-trien-20-yne-3,17-diol.
The structural formulas are as follows:
Norethindrone, USP
C20 H26 O2 M.W. 298.42
Ethinyl Estradiol, USP
C20 H24 O2 M.W. 296.40
CLINICAL PHARMACOLOGY
Combined Oral Contraceptives
Combined 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 1/35 and Nortrel 0.5/35 Tablets 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 1 lists the typical accidental pregnancy rates for users of combined oral contraceptives and other methods of contraception. The efficacy of these contraceptive methods, except sterilization, the IUD, and the NORPLANT® System depends upon the reliability with which they are used. Correct and consistent use of methods can result in lower failure rates.
| |||
% of Women Experiencing an Unintended Pregnancy within the First Year of Use | % of Women Continuing Use at One Year * | ||
Method (1) | Typical Use † (2) | Perfect Use ‡ (3) | (4) |
Chance § | 85 | 85 | |
Spermicides ¶ | 26 | 6 | 40 |
Periodic abstinence | 25 | 63 | |
Calendar | 9 | ||
Ovulation Method | 3 | ||
Sympto-Thermal # | 2 | ||
Post-Ovulation | 1 | ||
Cap Þ | |||
Parous Women | 40 | 26 | 42 |
Nulliparous Women | 20 | 9 | 56 |
Sponge | |||
Parous Women | 40 | 20 | 42 |
Nulliparous Women | 20 | 9 | 56 |
Diaphragm Þ | 20 | 6 | 56 |
Withdrawal | 19 | 4 | |
Condom ß | |||
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 |
Adapted from Hatcher et al., 1998 Ref. #1. Emergency Contraceptive Pills: Treatment initiated within 72 hours after unprotected intercourse reduces the risk of pregnancy by at least 75%.à Lactational Amenorrhea Method: LAM is highly effective, temporary method of contraception.è Source: Trussell J, Contraceptive efficacy. In Hatcher RA, Trussell J, Stewart F, Cates W, Stewart GK, Kowal D, Guest F, Contraceptive Technology: Seventeenth Revised Edition. New York NY: Irvington Publishers, 1998. |
Nortrel 0.5/35 and 1/35 have not been studied for and are not indicated for use in emergency contraception.
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