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Norethindrone Tablets, USP 0.35 mg
Patients should be counseled that this product does not protect against HIV infection (AIDS) and other sexually transmitted diseases.
Progestin-only oral contraceptives are indicated for the prevention of pregnancy.
If used perfectly, the first-year failure rate for progestin-only oral contraceptives is 0.5%. However, the typical failure rate is estimated to be closer to 5%, due to late or omitted pills.
Progestin-only oral contraceptives (POPs) should not be used by women who currently have the following conditions:
Cigarette smoking increases the risk of serious cardiovascular disease. Women who use oral contraceptives should be strongly advised not to smoke.
1. ECTOPIC PREGNANCY
Healthcare professionals should be alert to the possibility of an ectopic pregnancy in women who become pregnant or complain of lower abdominal pain while on progestin-only oral contraceptives.
2. DELAYED FOLLICULAR ATRESIA/OVARIAN CYSTS
If follicular development occurs, atresia of the follicle is sometimes delayed and the follicle may continue to grow beyond the size it would attain in a normal cycle. Generally these enlarged follicles disappear spontaneously. Often they are asymptomatic; in some cases they are associated with mild abdominal pain. Rarely they may twist or rupture, requiring surgical intervention.
3. IRREGULAR GENITAL BLEEDING
Irregular menstrual patterns are common among women using progestin-only oral contraceptives. If genital bleeding is suggestive of infection, malignancy, or other abnormal conditions, such nonpharmacologic causes should be ruled out. If prolonged amenorrhea occurs, the possibility of pregnancy should be evaluated.
4. CARCINOMA OF THE BREAST AND REPRODUCTIVE ORGANS
Some epidemiological studies of oral contraceptive users have reported an increased relative risk of developing breast cancer, particularly at a younger age and apparently related to duration of use. These studies have predominantly involved combined oral contraceptives, and there is insufficient data to determine whether the use of POPs similarly increases the risk.
Women with breast cancer should not use oral contraceptives because the role of female hormones in breast cancer has not been fully determined.
Some studies suggest that oral contraceptive use has been associated with an increase in the risk of cervical intraepithelial neoplasia in some populations of women.
However, there continues to be controversy about the extent to which such findings may be due to differences in sexual behavior and other factors. There is insufficient data to determine whether the use of POPs increases the risk of developing cervical intraepithelial neoplasia.
5. HEPATIC NEOPLASIA
Benign hepatic adenomas are associated with combined oral contraceptive use, although the incidence of benign tumors is rare in the United States. Rupture of benign, hepatic adenomas may cause death through intraabdominal hemorrhage.
Studies have shown an increased risk of developing hepatocellular carcinoma in combined oral contraceptive users. However, these cancers are rare in the U.S. There is insufficient data to determine whether POPs increase the risk of developing hepatic neoplasia.
The following points should be discussed with prospective users before prescribing progestin-only oral contraceptives:
To achieve maximum contraceptive effectiveness, Lyza must be taken exactly as directed. One tablet is taken every day, at the same time. Administration is continuous, with no interruption between pill packs.
Reference: Lyza® prescribing information. Charleston, SC: Afaxys, Inc. March 2017.
Please see full prescribing information here.