The product labeling information includes all published material associated to a drug. Product labeling documents include information like generic names, active ingredients, ingredient strength dosage, routes of administration, appearance, usage, warnings, inactive ingredients, etc.
Kelnor® 1/50 (28 Day Regimen) (ethynodiol diacetate and ethinyl estradiol tablets USP). Each pink tablet contains 1 mg of ethynodiol diacetate, USP and 50 mcg of ethinyl estradiol, USP and the inactive ingredients include anhydrous lactose, magnesium stearate, microcrystalline cellulose, polacrilin potassium, and povidone. In addition, the coloring agents are D&C Red No. 30 Aluminum Lake and D&C Yellow No. 10 Aluminum Lake. Each white tablet in the Kelnor 1/50 package is a placebo containing no active ingredients, and the inactive ingredients include anhydrous lactose, magnesium stearate and microcrystalline cellulose.The chemical name for ethynodiol diacetate, USP is 19-nor-17α-pregn-4-en-20-yne-3β, 17-diol diacetate, and for ethinyl estradiol, USP it is 19-nor-17α-pregna-1, 3, 5 (10)-trien-20-yne-3, 17-diol. The structural formulas are as follows:Ethynodiol Diacetate, USPC24H32O4 M.W. 384.51Ethinyl Estradiol, USPC20H24O2 M.W. 296.40Therapeutic class: Oral contraceptive.
Combination oral contraceptives act primarily by suppression of gonadotropins. Although the primary mechanism of this action is inhibition of ovulation, other alterations in the genital tract, including changes in the cervical mucus (which increase the difficulty of sperm entry into the uterus) and the endometrium (which may reduce the likelihood of implantation) may also contribute to contraceptive effectiveness.
Indications And Usage
Kelnor 1/50 is indicated for the prevention of pregnancy in women who elect to use oral contraceptives as a method of contraception. Oral contraceptive products such as Kelnor 1/50, which contain 50 mcg of estrogen, should not be used unless medically indicated.Oral contraceptives are highly effective. Table 1 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 and progestogen implants and injections, depends upon the reliability with which they are used. Correct and consistent use of methods can result in lower failure rates.Table 1: 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. % of women experiencing anunintended pregnancywithin the first year of use % of womencontinuing use at one yearAmong couples attempting to avoid pregnancy, the percentage who continue to use a method for one year. Method (1) Typical UseAmong typical couples who initiate use of a method (not necessarily for the first time), the percentage who experience an accidental pregnancy during the first year if they do not stop use for any other reason.(2) Perfect UseAmong couples who initiate use of a method (not necessarily for the first time) and who use it perfectly (both consistently and correctly), the percentage who experience an accidental pregnancy during the first year if they do not stop use for any other reason.(3) (4) ChanceThe percents becoming pregnant in columns (2) and (3) are based on data from populations where contraception is not used and from women who cease using contraception in order to become pregnant. Among such populations, about 89% become pregnant within one year. This estimate was lowered slightly (to 85%) to represent the percent who would become pregnant within one year among women now relying on reversible methods of contraception if they abandoned contraception altogether. 85 85 SpermicidesFoams, creams, gels, vaginal suppositories, and vaginal film. 26 6 40 Periodic abstinence 25 63 Calendar 9 Ovulation method 3 Sympto-thermalCervical mucus (ovulation) method supplemented by calendar in the pre-ovulatory and basal body temperature in the post-ovulatory phases. 2 Post-ovulation 1 Withdrawal 19 4 CapWith spermicidal cream or jelly. 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 CondomWithout spermicides. 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 T 380A 0.8 0.6 78 LNg 20 0.1 0.1 81 Injection (Depo-Provera®) 0.3 0.3 70 Implant (Norplant® and Norplant-2®) 0.05 0.05 88 Female sterilization 0.5 0.5 100 Male sterilization 0.15 0.1 100 Emergency Contraceptive Pills: Treatment initiated within 72 hours after unprotected intercourse reduces the risk of pregnancy by at least 75%.The treatment schedule is one dose within 72 hours after unprotected intercourse, and a second dose 12 hours after the first dose. The Food and Drug Administration has declared the following brands of oral contraceptives to be safe and effective for emergency contraception: Ovral® (1 dose is 2 white pills), Alesse® (1 dose is 5 pink pills), Nordette® or Levlen® (1 dose is 2 light-orange pills), Lo/Ovral® (1 dose is 4 white pills), Triphasil® or Tri-Levlen® (1 dose is 4 yellow pills). Lactational Amenorrhea Method: LAM is a highly effective, temporary method of contraception.However, to maintain effective protection against pregnancy, another method of contraception must be used as soon as menstruation resumes, the frequency or duration of breastfeeds is reduced, bottle feeds are introduced, or the baby reaches six months of age. 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, in press.1
- Oral contraceptives should not be used in women who have the following conditions:Thrombophlebitis or thromboembolic disordersA past history of deep vein thrombophlebitis or thromboembolic disordersCerebral vascular disease, myocardial infarction, or coronary artery disease, or a past history of these conditionsKnown or suspected carcinoma of the breast, or a history of this conditionKnown or suspected carcinoma of the female reproductive organs or suspected estrogen-dependent neoplasia, or a history of these conditionsUndiagnosed abnormal genital bleedingHistory of cholestatic jaundice of pregnancy or jaundice with prior oral contraceptive usePast or present, benign or malignant liver tumorsKnown or suspected pregnancyAre receiving Hepatitis C drug combinations containing ombitasvir/paritaprevir/ritonavir, with or without dasabuvir, due to the potential for ALT elevations (see WARNINGS, Risk of Liver Enzyme Elevations with Concomitant Hepatitis C Treatment).
Cigarette smoking increases the risk of serious cardiovascular side effects from oral contraceptive use. This risk increases with age and with heavy smoking (15 or more cigarettes per day) and is quite marked in women over 35 years of age. Women who use oral contraceptives should be strongly advised not to smoke.The use of oral contraceptives is associated with increased risk of several serious conditions including venous and arterial thromboembolism, thrombotic and hemorrhagic stroke, myocardial infarction, liver tumors or other liver lesions, and gallbladder disease. The risk of morbidity and mortality increases significantly in the presence of other risk factors such as hypertension, hyperlipidemia, obesity, and diabetes mellitus.Practitioners prescribing oral contraceptives should be familiar with the following information relating to these and other risks.The information contained herein is principally based on studies carried out in patients who used oral contraceptives with formulations containing higher amounts of estrogens and progestogens than those in common use today. The effect of long-term use of the oral contraceptives with lesser amounts of both estrogens and progestogens remains to be determined.Throughout this labeling, epidemiological studies reported are of two types: retrospective case-control studies and prospective cohort studies. Case-control studies provide an estimate of the relative risk of a disease, which is defined as the ratio of the incidence of a disease among oral contraceptive users to that among nonusers. The relative risk (or odds ratio) does not provide information about the actual clinical occurrence of a disease. Cohort studies provide a measure of both the relative risk and the attributable risk. The latter is the difference in the incidence of disease between oral contraceptive users and nonusers. The attributable risk does provide information about the actual occurrence or incidence of a disease in the subject population. For further information, the reader is referred to a text on epidemiological methods.
A. Myocardial Infarction
An increased risk of myocardial infarction has been associated with oral contraceptive use.2-21 This increased risk is primarily in smokers or in women with other underlying risk factors for coronary artery disease such as hypertension, obesity, diabetes, and hypercholesterolemia. The relative risk for myocardial infarction in current oral contraceptive users has been estimated to be 2 to 6. The risk is very low under the age of 30. However, there is the possibility of a risk of cardiovascular disease even in very young women who take oral contraceptives.Smoking in combination with oral contraceptive use has been reported to contribute substantially to the risk of myocardial infarction in women in their mid-thirties or older, with smoking accounting for the majority of excess cases.22 Mortality rates associated with circulatory disease have been shown to increase substantially in smokers, especially in those 35 years of age and older among women who use oral contraceptives (see Figure 1, Table 2).Figure 1. Circulatory disease mortality rates per 100,000 woman-years by age, smoking status, and oral contraceptive use.14Oral contraceptives may compound the effects of well-known cardiovascular risk factors such as hypertension, diabetes, hyperlipidemias, hypercholesterolemia, age, cigarette smoking, and obesity. In particular, some progestogens decrease HDL cholesterol23-31 and cause glucose intolerance, while estrogens may create a state of hyperinsulinism.32 Oral contraceptives have been shown to increase blood pressure among some users (see WARNINGS, No. 10). Similar effects on risk factors have been associated with an increased risk of heart disease.
An increased risk of thromboembolic and thrombotic disease associated with the use of oral contraceptives is well established.17, 33-51 Case-control studies have estimated the relative risk to be 3 for the first episode of superficial venous thrombosis, 4 to 11 for deep vein thrombosis or pulmonary embolism, and 1.5 to 6 for women with predisposing conditions for venous thromboembolic disease.34-37, 45, 46 Cohort studies have shown the relative risk to be somewhat lower, about 3 for new cases (subjects with no past history of venous thrombosis or varicose veins) and about 4.5 for new cases requiring hospitalization.42, 47, 48 The risk of venous thromboembolic disease associated with oral contraceptives is not related to duration of use.A two- to seven-fold increase in relative risk of postoperative thromboembolic complications has been reported with the use of oral contraceptives.38, 39 The relative risk of venous thrombosis in women who have predisposing conditions is about twice that of women without such medical conditions.43 If feasible, oral contraceptives should be discontinued at least 4 weeks prior to and for 2 weeks after elective surgery of a type associated with an increased risk of thromboembolism, and also during and following prolonged immobilization. Since the immediate postpartum period is also associated with an increased risk of thromboembolism, oral contraceptives should be started no earlier than 4 to 6 weeks after delivery in women who elect not to breastfeed.
C. Cerebrovascular Diseases
Both the relative and attributable risks of cerebrovascular events (thrombotic and hemorrhagic strokes) have been reported to be increased with oral contraceptive use,14, 17, 18, 34, 42, 46, 52-59 although, in general, the risk was greatest among older (over 35 years), hypertensive women who also smoked. Hypertension was reported to be a risk factor for both users and nonusers, for both types of strokes, while smoking increased the risk for hemorrhagic strokes.In one large study,52 the relative risk for thrombotic stroke was reported as 9.5 times greater in users than in nonusers. It ranged from 3 for normotensive users to 14 for users with severe hypertension.54 The relative risk for hemorrhagic stroke was reported to be 1.2 for nonsmokers who used oral contraceptives, 1.9 to 2.6 for smokers who did not use oral contraceptives, 6.1 to 7.6 for smokers who used oral contraceptives, 1.8 for normotensive users, and 25.7 for users with severe hypertension. The risk is also greater in older women and among smokers.
A positive association has been reported between the amount of estrogen and progestogen in oral contraceptives and the risk of vascular disease.41, 43, 53, 59-64 A decline in serum high density lipoproteins (HDL) has been reported with many progestogens.23-31 A decline in serum high density lipoproteins has been associated with an increased incidence of ischemic heart disease.65 Because estrogens increase HDL-cholesterol, the net effect of an oral contraceptive depends on the balance achieved between doses of estrogen and progestogen and the nature and absolute amount of progestogens used in the contraceptives. The amount of both steroids should be considered in the choice of an oral contraceptive.Minimizing exposure to estrogen and progestogen is in keeping with good principles of therapeutics. For any particular estrogen-progestogen combination, the dosage regimen prescribed should be one that contains the least amount of estrogen and progestogen that is compatible with a low failure rate and the needs of the individual patient. New acceptors of oral contraceptives should be started on preparations containing the lowest estrogen content that produces satisfactory results in the individual.Products containing 50 mcg estrogen should be used only when medically indicated.
E. Persistence Of Risk Of Vascular Disease
There are three studies that have shown persistence of risk of vascular disease for users of oral contraceptives. In a study in the United States, the risk of developing myocardial infarction after discontinuing oral contraceptives persisted for at least 9 years for women 40 to 49 years old who had used oral contraceptives for 5 or more years, but this increased risk was not demonstrated in other age groups.16 Another American study reported former use of oral contraceptives was significantly associated with increased risk of subarachnoid hemorrhage.57 In another study, in Great Britain, the risk of developing non-rheumatic heart disease plus hypertension, subarachnoid hemorrhage, cerebral thrombosis, and transient ischemic attacks persisted for at least 6 years after discontinuation of oral contraceptives, although the excess risk was small.14, 18, 66 It should be noted that these studies were performed with oral contraceptive formulations containing 50 mcg or more of estrogens.
2. Estimates Of Mortality From Contraceptive Use
One study67 gathered data from a variety of sources that have estimated the mortality rates associated with different methods of contraception at different ages (Table 2). These estimates include the combined risk of death associated with contraceptive methods plus the risk attributable to pregnancy in the event of method failure. Each method of contraception has its specific benefits and risks. The study concluded that, with the exception of oral contraceptive users 35 and older who smoke and 40 or older who do not smoke, mortality associated with all methods of birth control is low and below that associated with childbirth. The observation of a possible increase in risk of mortality with age for oral contraceptive users is based on data gathered in the 1970’s, but not reported until 1983.67 However, current clinical practice involves the use of lower estrogen dose formulations combined with careful restriction of oral contraceptive use to women who do not have the various risk factors listed in this labeling.Because of these changes in practice and, also, because of some limited new data that suggest that the risk of cardiovascular disease with the use of oral contraceptives may now be less than previously observed,48, 152 the Fertility and Maternal Health Drugs Advisory Committee was asked to review the topic in 1989. The Committee concluded that, although cardiovascular disease risks may be increased with oral contraceptive use after age 40 in healthy nonsmoking women (even with the newer low-dose formulations), there are greater potential health risks associated with pregnancy in older women and with the alternative surgical and medical procedures that may be necessary if such women do not have access to effective and acceptable means of contraception.Therefore, the Committee recommended that the benefits of oral contraceptive use by healthy nonsmoking women over 40 may outweigh the possible risks. Of course, older women, as all women who take oral contraceptives, should take the lowest possible dose formulation that is effective. Table 2: Annual number of birth-related or method-related deaths associated with control of fertility per 100,000 nonsterile women, by fertility control method according to age.67 Age Method of Control 15 to 19 20 to 24 25 to 29 30 to 34 35 to 39 40 to 44 No fertility control methodsDeaths are birth-related 7.0 7.4 9.1 14.8 25.7 28.2 Oral contraceptives nonsmokerDeaths are method-related 0.3 0.5 0.9 1.9 13.8 31.6 smoker 2.2 3.4 6.6 13.5 51.1 117.2 IUD 0.8 0.8 1.0 1.0 1.4 1.4 Condom 1.1 1.6 0.7 0.2 0.3 0.4 Diaphragm/Spermicide 1.9 1.2 1.2 1.3 2.2 2.8 Periodic abstinence 2.5 1.6 1.6 1.7 2.9 3.6Adapted from Ory.67
3. Carcinoma Of The Breast And Reproductive Organs
Numerous epidemiological studies have been performed on the incidence of breast, endometrial, ovarian, and cervical cancer in women using oral contraceptives. While there are conflicting reports, many studies suggest that the use of oral contraceptives is not associated with an overall increase in the risk of developing breast cancer.17, 40, 68-78 Other studies, however, have reported an increased risk overall,153-155 or in certain subgroups. In these studies, increased risk has been associated with long duration of use, use beginning at a young age, use before the first term pregnancy, use by those who had an early menarche, those who had a positive family history of breast cancer, or in nulliparas.79-102, 151, 156-162 These risks have been surveyed in two books163-164 and in review articles.85, 99, 153, 165-167Some studies suggested that oral contraceptive use was associated with an increase in the risk of cervical intraepithelial neoplasia, dysplasia, erosion, carcinoma, or micro-glandular dysplasia in some populations of women.17, 50, 103-115 However, there continues to be controversy about the extent to which such findings may be due to differences in sexual behavior and other factors.In spite of many studies of the relationship between oral contraceptive use and breast and cervical cancers, a cause and effect relationship has not been established.
4. Hepatic Neoplasia
Benign hepatic adenomas and other hepatic lesions have been associated with oral contraceptive use,116-121 although the incidence of such benign tumors is rare in the United States. Indirect calculations have estimated the attributable risk to be in the range of 3.3 cases per 100,000 for users, a risk that increases after 4 or more years of use.120 Rupture of benign, hepatic adenomas or other lesions may cause death through intraabdominal hemorrhage. Therefore, such lesions should be considered in women presenting with abdominal pain and tenderness, abdominal mass, or shock. About one quarter of the cases presented because of abdominal masses; up to one half had signs and symptoms of acute intraperitoneal hemorrhage.121 Diagnosis may prove difficult.Studies from the U.S.,122, 150 Great Britain,123, 124 and Italy125 have shown an increased risk of hepatocellular carcinoma in long-term (>8 years; relative risk of 7 to 20) oral contraceptive users. However, these cancers are rare in the United States, and the attributable risk (the excess incidence) of liver cancers in oral contraceptive users approaches less than 1 per 1,000,000 users.
5. Risk Of Liver Enzyme Elevations With Concomitant Hepatitis C Treatment
During clinical trials with the Hepatitis C combination drug regimen that contains ombitasvir/paritaprevir/ritonavir, with or without dasabuvir, ALT elevations greater than 5 times the upper limit of normal (ULN), including some cases greater than 20 times the ULN, were significantly more frequent in women using ethinyl estradiol-containing medications such as COCs. Discontinue Kelnor prior to starting therapy with the combination drug regimen ombitasvir/paritaprevir/ritonavir, with or without dasabuvir (see CONTRAINDICATIONS). Kelnor can be restarted approximately 2 weeks following completion of treatment with the combination drug regimen.
6. Ocular Lesions
There have been reports of retinal thrombosis and other ocular lesions associated with the use of oral contraceptives. Oral contraceptives should be discontinued if there is unexplained, gradual or sudden, partial or complete loss of vision; onset of proptosis or diplopia; papilledema; or any evidence of retinal vascular lesions. Appropriate diagnostic and therapeutic measures should be undertaken immediately.
7. Oral Contraceptive Use Before Or During Pregnancy
Extensive epidemiological studies have revealed no increased risk of birth defects in women who have used oral contraceptives prior to pregnancy.126, 129 The majority of recent studies also do not suggest a teratogenic effect, particularly insofar as cardiac anomalies and limb reduction defects are concerned,126-129 when the pill is taken inadvertently during early pregnancy.The administration of oral contraceptives to induce withdrawal bleeding should not be used as a test for pregnancy. Oral contraceptives should not be used during pregnancy to treat threatened or habitual abortion. It is recommended that for any patient who has missed two consecutive periods, pregnancy should be ruled out before continuing oral contraceptive use. If the patient has not adhered to the prescribed schedule, the possibility of pregnancy should be considered at the time of the first missed period and further use of oral contraceptives should be withheld until pregnancy has been ruled out. Oral contraceptive use should be discontinued if pregnancy is confirmed.
8. Gallbladder Disease
Earlier studies reported an increased lifetime relative risk of gallbladder surgery in users of oral contraceptives and estrogens.40, 42, 53, 70 More recent studies, however, have shown that the relative risk of developing gallbladder disease among oral contraceptive users may be minimal.130-132 The recent findings of minimal risk may be related to the use of oral contraceptive formulations containing lower doses of estrogens and progestogens.
9. Carbohydrate And Lipid Metabolic Effects
Oral contraceptives have been shown to cause a decrease in glucose tolerance in a significant percentage of users.32 This effect has been shown to be directly related to estrogen dose.133 Progestogens increase insulin secretion and create insulin resistance, the effect varying with different progestational agents.32, 134 However, in the nondiabetic woman, oral contraceptives appear to have no effect on fasting blood glucose. Because of these demonstrated effects, prediabetic and diabetic women should be carefully observed while taking oral contraceptives.Some women may have persistent hypertriglyceridemia while on the pill. As discussed earlier (see WARNINGS, 1a and 1d), changes in serum triglycerides and lipoprotein levels have been reported in oral contraceptive users.23-31, 135, 136
10. Elevated Blood Pressure
An increase in blood pressure has been reported in women taking oral contraceptives50, 53, 137-139 and this increase is more likely in older oral contraceptive users137 and with extended duration of use.53 Data from the Royal College of General Practitioners138 and subsequent randomized trials have shown that the incidence of hypertension increases with increasing concentrations of progestogens.Women with a history of hypertension or hypertension-related disease, or renal disease139 should be encouraged to use another method of contraception. If such women elect to use oral contraceptives, they should be monitored closely and if significant elevation of blood pressure occurs, oral contraceptives should be discontinued. For most women, elevated blood pressure will return to normal after stopping oral contraceptives,137 and there is no difference in the occurrence of hypertension among ever- and never-users.140
The onset or exacerbation of migraine or the development of headache of a new pattern that is recurrent, persistent, or severe requires discontinuation of oral contraceptives and evaluation of the cause.
12. Bleeding Irregularities
Breakthrough bleeding and spotting are sometimes encountered in patients on oral contraceptives, especially during the first three months of use. Nonhormonal causes should be considered and adequate diagnostic measures taken to rule out malignancy or pregnancy in the event of breakthrough bleeding, as in the case of any abnormal vaginal bleeding. If a pathologic basis has been excluded, time alone or a change to another formulation may solve the problem. In the event of amenorrhea, pregnancy should be ruled out. Some women may encounter post-pill amenorrhea or oligomenorrhea, especially when such a condition was pre-existent.
1. Physical Examination And Follow-Up
It is good medical practice for all women to have annual history and physical examinations, including women using oral contraceptives. The physical examination, however, may be deferred until after initiation of oral contraceptives if requested by the woman and judged appropriate by the clinician. The physical examination should include special reference to blood pressure, breasts, abdomen, and pelvic organs, including cervical cytology, and relevant laboratory tests. In case of undiagnosed, persistent, or recurrent abnormal vaginal bleeding, appropriate measures should be conducted to rule out malignancy. Women with a strong family history of breast cancer or who have breast nodules should be monitored with particular care.
2. Lipid Disorders
Women who are being treated for hyperlipidemias should be followed closely if they elect to use oral contraceptives. Some progestogens may elevate LDL levels and may render the control of hyperlipidemias more difficult.
3. Liver Function
If jaundice develops in any woman receiving oral contraceptives, they should be discontinued. Steroids may be poorly metabolized in patients with impaired liver function and should be administered with caution in such patients. Cholestatic jaundice has been reported after combined treatment with oral contraceptives and troleandomycin. Hepatotoxicity following a combination of oral contraceptives and cyclosporine has also been reported.
4. Fluid Retention
Oral contraceptives may cause some degree of fluid retention. They should be prescribed with caution, and only with careful monitoring, in patients with conditions that might be aggravated by fluid retention, such as convulsive disorders, migraine syndrome, asthma, or cardiac, hepatic, or renal dysfunction.
5. Emotional Disorders
Women with a history of depression should be carefully observed and the drug discontinued if depression recurs to a serious degree.
6. Contact Lenses
Contact lens wearers who develop visual changes or changes in lens tolerance should be assessed by an ophthalmologist.
7. Drug Interactions
Reduced efficacy and increased incidence of breakthrough bleeding and menstrual irregularities have been associated with concomitant use of rifampin. A similar association, though less marked, has been suggested for barbiturates, phenylbutazone, phenytoin sodium, and possibly with griseofulvin, ampicillin, and tetracyclines. Administration of troglitazone concomitantly with a combination oral contraceptive (estrogen and progestin) reduced the plasma concentrations of both hormones by approximately 30%. This could result in loss of contraceptive efficacy.Concomitant Use with HCV Combination Therapy – Liver Enzyme ElevationDo not co-administer Kelnor with HCV drug combinations containing ombitasvir/paritaprevir/ritonavir, with or without dasabuvir, due to potential for ALT elevations (see WARNINGS, Risk of Liver Enzyme Elevations with Concomitant Hepatitis C Treatment).
8. Laboratory Test Interactions
- Certain endocrine and liver function tests and blood components may be affected by oral contraceptives:Increased prothrombin and factors VII, VIII, IX and X; decreased antithrombin III; increased platelet aggregability.Increased thyroid binding globulin (TBG), leading to increased circulating total thyroid hormone as measured by protein-bound iodine (PBI), T4 by column or by radioimmunoassay. Free T3 resin uptake is decreased, reflecting the elevated TBG; free T4 concentration is unaltered.Other binding proteins may be elevated in the serum.Sex-steroid binding globulins are increased and result in elevated levels of total circulating sex steroids and corticoids; however, free or biologically active levels remain unchanged.Triglycerides and phospholipids may be increased.Glucose tolerance may be decreased.Serum folate levels may be depressed. This may be of clinical significance if a woman becomes pregnant shortly after discontinuing oral contraceptives.Increased sulfobromophthalein and other abnormalities in liver function tests may occur. Plasma levels of trace minerals may be altered.Response to the metyrapone test may be reduced.
Pregnancy Category X(See CONTRAINDICATIONS and WARNINGS.)
11. Nursing Mothers
Small amounts of oral contraceptive steroids have been identified in the milk of nursing mothers141-143 and a few adverse effects on the child have been reported, including jaundice and breast enlargement. In addition, oral contraceptives given in the postpartum period may interfere with lactation by decreasing the quantity and quality of breast milk. If possible, the nursing mother should be advised not to use oral contraceptives, but to use other forms of contraception until she has completely weaned her child.
12. Pediatric Use
Safety and efficacy of Kelnor has been established in women of reproductive age. Safety and efficacy are expected to be the same for postpubertal adolescents under the age of 16 and for users 16 years and older. Use of this product before menarche is not indicated.
13. Venereal Diseases
Oral contraceptives are of no value in the prevention or treatment of venereal disease. The prevalence of cervical Chlamydia trachomatis and Neisseria gonorrhoeae in oral contraceptive users is increased several-fold.144, 145 It should not be assumed that oral contraceptives afford protection against pelvic inflammatory disease from chlamydia.144 Patients should be counseled that this product does not protect against HIV infection (AIDS) and other sexually transmitted diseases.
A. The pathologist should be advised of oral contraceptive therapy when relevant specimens are submitted.b. Treatment with oral contraceptives may mask the onset of the climacteric. (See WARNINGS regarding risks in this age group.)
Information For The Patient
See patient labeling printed below.
- An increased risk of the following serious adverse reactions has been associated with the use of oral contraceptives (see WARNINGS):Thrombophlebitis and thrombosisArterial thromboembolismPulmonary embolismMyocardial infarction and coronary thrombosisCerebral hemorrhageCerebral thrombosisHypertensionGallbladder diseaseBenign and malignant liver tumors, and other hepatic lesionsThere is evidence of an association between the following conditions and the use of oral contraceptives, although additional confirmatory studies are needed:Mesenteric thrombosisNeuro-ocular lesions (e.g., retinal thrombosis and optic neuritis)The following adverse reactions have been reported in patients receiving oral contraceptives and are believed to be drug-related:NauseaVomitingGastrointestinal symptoms (such as abdominal cramps and bloating)Breakthrough bleedingSpottingChange in menstrual flowAmenorrhea during or after useTemporary infertility after discontinuation of useEdemaChloasma or melasma, which may persistBreast changes: tenderness, enlargement, secretionChange in weight (increase or decrease)Change in cervical erosion or secretionDiminution in lactation when given immediately postpartumCholestatic jaundiceMigraineRash (allergic)Mental depressionReduced tolerance to carbohydratesVaginal candidiasisChange in corneal curvature (steepening)Intolerance to contact lensesThe following adverse reactions or conditions have been reported in users of oral contraceptives and the association has been neither confirmed nor refuted:Premenstrual syndromeCataractsChanges in appetiteCystitis-like syndromeHeadacheNervousnessDizzinessHirsutismLoss of scalp hairErythema multiformeErythema nodosumHemorrhagic eruptionVaginitisPorphyria Impaired renal functionHemolytic uremic syndromeAcneChanges in libidoColitisBudd-Chiari syndromeEndocervical hyperplasia or ectropion
Serious ill effects have not been reported following acute ingestion of large doses of oral contraceptives by young children.180, 181 Overdosage may cause nausea, and withdrawal bleeding may occur in females.
Non-Contraceptive Health Benefits
- The following non-contraceptive health benefits related to the use of oral contraceptives are supported by epidemiological studies that largely utilized oral contraceptive formulations containing estrogen doses exceeding 35 mcg of ethinyl estradiol or 50 mcg of mestranol.148, 149Effects on MensesIncreased menstrual cycle regularityDecreased blood loss and decreased risk of iron-deficiency anemiaDecreased frequency of dysmenorrheaEffects Related to Inhibition of OvulationDecreased risk of functional ovarian cystsDecreased risk of ectopic pregnanciesEffects From Long-Term UseDecreased risk of fibroadenomas and fibrocystic disease of the breastDecreased risk of acute pelvic inflammatory diseaseDecreased risk of endometrial cancerDecreased risk of ovarian cancerDecreased risk of uterine fibroids
Dosage And Administration
To achieve maximum contraceptive effectiveness, oral contraceptives must be taken exactly as directed and at intervals of 24 hours.IMPORTANT: If the Sunday start schedule is selected, the patient should be instructed to use an additional method of protection until after the first week of administration in the initial cycle.The possibility of ovulation and conception prior to initiation of use should be considered.Kelnor 1/50 (28 Day Regimen) (ethynodiol diacetate and ethinyl estradiol tablets)
The Kelnor 1/50 28 day regimen tablet dispenser contains 21 pink colored active tablets arranged in three numbered rows of 7 tablets each, followed by a fourth row of 7 white placebo tablets.Days of the week are printed above the tablets, starting with Sunday on the left.
For a DAY 1 START, count the first day of menstrual flow as Day 1 and the first tablet (pink) is then taken on Day 1. For a SUNDAY START when menstrual flow begins on or before Sunday, the first tablet (pink) is taken on that day. With either a DAY 1 START or SUNDAY START, 1 tablet (pink) is taken each day at the same time for 21 days. Then the white tablets are taken for 7 days, whether bleeding has stopped or not. After all 28 tablets have been taken, whether bleeding has stopped or not, the same dosage schedule is repeated beginning on the following day.
Spotting, Breakthrough Bleeding, Or Nausea
If spotting (bleeding insufficient to require a pad), breakthrough bleeding (heavier bleeding similar to a menstrual flow), or nausea occurs the patient should continue taking her tablets as directed. The incidence of spotting, breakthrough bleeding or nausea is minimal, most frequently occurring in the first cycle. Ordinarily spotting or breakthrough bleeding will stop within a week. Usually the patient will begin to cycle regularly within two to three courses of tablet-taking. In the event of spotting or breakthrough bleeding organic causes should be borne in mind. (See WARNINGS, No. 12.)
Missed Menstrual Periods
Withdrawal flow will normally occur 2 or 3 days after the last active tablet is taken. Failure of withdrawal bleeding ordinarily does not mean that the patient is pregnant, providing the dosage schedule has been correctly followed. (See WARNINGS, No. 7.)If the patient has not adhered to the prescribed dosage regimen, the possibility of pregnancy should be considered after the first missed period, and oral contraceptives should be withheld until pregnancy has been ruled out.If the patient has adhered to the prescribed regimen and misses two consecutive periods, pregnancy should be ruled out before continuing the contraceptive regimen.The first intermenstrual interval after discontinuing the tablets is usually prolonged; consequently, a patient for whom a 28-day cycle is usual might not begin to menstruate for 35 days or longer. Ovulation in such prolonged cycles will occur correspondingly later in the cycle. Post-treatment cycles after the first one, however, are usually typical for the individual woman prior to taking tablets. (See WARNINGS, No. 12.)
If a woman misses taking one active tablet, the missed tablet should be taken as soon as it is remembered. In addition, the next tablet should be taken at the usual time. If two consecutive active tablets are missed in week 1 or week 2 of the dispenser, the dosage should be doubled for the next 2 days. The regular schedule should then be resumed, but an additional method of protection must be used as backup for the next 7 days if she has sex during that time or she may become pregnant.If two consecutive active tablets are missed in week 3 of the dispenser or three consecutive active tablets are missed during any of the first 3 weeks of the dispenser, direct the patient to do one of the following: Day 1 Starters should discard the rest of the dispenser and begin a new dispenser that same day; Sunday Starters should continue to take 1 tablet daily until Sunday, discard the rest of the dispenser and begin a new dispenser that same day. The patient may not have a period this month; however, if she has missed two consecutive periods, pregnancy should be ruled out. An additional method of protection must be used as a backup for the next 7 days after the tablets are missed if she has sex during that time or she may become pregnant.While there is little likelihood of ovulation if only one active tablet is missed, the possibility of spotting or breakthrough bleeding is increased and should be expected if two or more successive active tablets are missed. However, the possibility of ovulation increases with each successive day that scheduled active tablets are missed.If one or more placebo tablets of Kelnor 1/50 are missed, the Kelnor 1/50 schedule should be resumed on the eighth day after the last pink colored tablet was taken. Omission of placebo tablets in the 28 tablet courses does not increase the possibility of conception provided that this schedule is followed.
Kelnor® 1/50 (28 Day Regimen) (ethynodiol diacetate and ethinyl estradiol USP): Each pink Kelnor 1/50 tablet is round in shape, unscored, debossed with WATSON 384 and contains 1 mg of ethynodiol diacetate, USP and 50 mcg of ethinyl estradiol, USP.Kelnor 1/50 is packaged in cartons of six (NDC 0093-8073-16) tablet dispensers. Each dispenser contains 21 pink tablets and 7 white placebo tablets. (Placebo tablets have a debossed WATSON on one side and P on the other side.)Store at 20° to 25°C (68° to 77°F) [See USP Controlled Room Temperature].KEEP THIS AND ALL MEDICATIONS OUT OF THE REACH OF CHILDREN.
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Brief Summary Of Patient Warnings
This product (like all oral contraceptives) is intended to prevent pregnancy. It does not protect against HIV infection (AIDS) and other sexually transmitted diseases.
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NDC 0093-8073-166 Blister Card Dispensers, 28 Tablets EachKelnor 1/50(ethynodiol diacetate and ethinyl estradiol tablets USP)Carton
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