Indications and Usage
Necon 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.
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Adapted from Hatcher et al, 1998, Ref. #1. |
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Emergency Contraceptive Pills: Treatment initiated within 72 hours after unprotected intercourse reduces the risk of pregnancy by at least 75%.9 |
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Lactational Amenorrhea Method: LAM is highly effective, temporary method of contraception.1
0
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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. |
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1
Among 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 |
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2 Among 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 |
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3 Among couples attempting to avoid pregnancy, the percentage who continue to use a method for one year |
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4 The 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 |
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5 Foams, creams, gels, vaginal suppositories, and vaginal film |
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6 Cervical mucus (ovulation) method supplemented by calendar in the pre-ovulatory and basal body temperature in the post-ovulatory phases |
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7 With spermicidal cream or jelly |
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8 Without spermicides |
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9 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) |
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1
0 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. |
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% of Women Experiencing an Unintended Pregnancy within the First Year of Use |
% of Women Continuing Use at One Year3 | |
| Method |
Typical Use1 | Perfect Use2 |
|
| (1) |
(2) |
(3) |
(4) |
| Chance4 | 85 |
85 |
|
| Spermicides5 | 26 |
6 |
40 |
| Periodic abstinence |
25 |
|
63 |
| Calendar |
|
9 |
|
| Ovulation Method |
|
3 |
|
| Sympto-Thermal6 |
|
2 |
|
| Post-Ovulation |
|
1 |
|
| Cap7 |
|
|
|
| Parous Women |
40 |
26 |
42 |
| Nulliparous Women |
20 |
9 |
56 |
| Sponge |
|
|
|
| Parous Women |
40 |
20 |
42 |
| Nulliparous Women |
20 |
9 |
56 |
| Diaphragm7 | 20 |
6 |
56 |
| Withdrawal |
19 |
4 |
|
| Condom8 |
|
|
|
| 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 |
Necon has not been studied for and is not indicated for use in emergency contraception.
Dosage and Administration
To achieve maximum contraceptive effectiveness, Necon Tablets must be taken exactly as directed and at intervals not exceeding 24 hours. Necon Tablets are available in a compact blister card which is preset for a Sunday Start. Day 1 Start stickers are also provided.
Sunday Start
When taking Necon, the first "active" tablet should be taken on the first Sunday after menstruation begins. If the period begins on Sunday, the first "active" tablet should be taken that day. Take one active tablet daily for 21 days followed by one white "reminder" tablet daily for 7 days. After 28 tablets have been taken, a new course is started the next day (Sunday). For the first cycle of a Sunday Start regimen, another method of contraception, such as a condom or spermicide, should be used until after the first 7 consecutive days of administration.
If the patient misses one (1) "active" tablet in Weeks 1, 2, or 3, the tablet should be taken as soon as she remembers. If the patient misses two (2) "active" tablets in Week 1 or Week 2, the patient should take two (2) tablets the day she remembers and two (2) tablets the next day; and then continue taking one (1) tablet a day until she finishes the pack. The patient should be instructed to use a back-up method of birth control, such as a condom or spermicide, if she has sex in the seven (7) days after missing pills. If the patient misses two (2) "active" tablets in the third week or misses three (3) or more "active" tablets in a row, the patient should continue taking one tablet every day until Sunday. On Sunday the patient should throw out the rest of the pack and start a new pack that same day. The patient should be instructed to use a back-up method of birth control if she has sex in the seven (7) days after missing pills.
Complete instructions to facilitate patient counseling on proper pill usage may be found in the Detailed Patient Labeling ("How to Take the Pill" section).
Day 1 Start
The dosage of Necon, for the initial cycle of therapy, is one "active" tablet administered daily from the 1st through the 21st day of the menstrual cycle, counting the first day of menstrual flow as "Day 1" followed by one white "reminder" tablet daily for 7 days. Tablets are taken without interruption for 28 days. After 28 tablets have been taken, a new course is started the next day.
If the patient misses one (1) "active" tablet in Weeks 1, 2, or 3, the tablet should be taken as soon as she remembers. If the patient misses two (2) "active" tablets in Week 1 or Week 2, the patient should take two (2) tablets the day she remembers and two (2) tablets the next day; and then continue taking one (1) tablet a day until she finishes the pack. The patient should be instructed to use a back-up method of birth control, such as a condom or spermicide, if she has sex in the seven (7) days after missing pills. If the patient misses two (2) "active" tablets in the third week or misses three (3) or more "active" tablets in a row, the patient should throw out the rest of the pack and start a new pack that same day. The patient should be instructed to use a back-up method of birth control if she has sex in the seven (7) days after missing pills.
Complete instructions to facilitate patient counseling on proper pill usage may be found in the Detailed Patient Labeling ("How to Take the Pill" section).
The use of Necon for contraception may be initiated 4 weeks postpartum in women who elect not to breastfeed. When the tablets are administered during the postpartum period, the increased risk of thromboembolic disease associated with the postpartum period must be considered. (See CONTRAINDICATIONS and WARNINGS concerning thromboembolic disease. See also PRECAUTIONS: Nursing Mothers.) The possibility of ovulation and conception prior to initiation of medication should be considered.
(See Discussion of Dose-Related Risk of Vascular Disease from Oral Contraceptives.)
ADDITIONAL INSTRUCTIONS
Breakthrough bleeding, spotting, and amenorrhea are frequent reasons for patients discontinuing oral contraceptives. In breakthrough bleeding, as in all cases of irregular bleeding from the vagina, nonfunctional causes should be borne in mind. In undiagnosed persistent or recurrent abnormal bleeding from the vagina, adequate diagnostic measures are indicated to rule out pregnancy or malignancy. If pathology has been excluded, time or a change to another formulation may solve the problem. Changing to an oral contraceptive with a higher estrogen content, while potentially useful in minimizing menstrual irregularity, should be done only if necessary since this may increase the risk of thromboembolic disease.
Use of oral contraceptives in the event of a missed menstrual period:
1. 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 oral contraceptive use should be discontinued if pregnancy is confirmed.
2. If the patient has adhered to the prescribed regimen and misses two consecutive periods, pregnancy should be ruled out.
Contraindications
Oral contraceptives should not be used in women who currently have the following conditions:
Thrombophlebitis or thromboembolic disorders
A past history of deep vein thrombophlebitis or thromboembolic disorders
Known thrombophilic conditions
Cerebral vascular or coronary artery disease (current or history)
Valvular heart disease with complications
Persistent blood pressure values of ≥160 mm Hg systolic or ≥100 mg Hg diastolic96
Diabetes with vascular involvement
Headaches with focal neurological symptoms
Major surgery with prolonged immobilization
Known or suspected carcinoma of the breast
Carcinoma of the endometrium or other known or suspected estrogen-dependent neoplasia
Undiagnosed abnormal genital bleeding
Cholestatic jaundice of pregnancy or jaundice with prior pill use
Acute or chronic hepatocellular disease with abnormal liver function
Hepatic adenomas or carcinomas
Known or suspected pregnancy
Hypersensitivity to any component of this product
Are 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).
Adverse Reactions
An increased risk of the following serious adverse reactions has been associated with the use of oral contraceptives (See WARNINGS).
Thrombophlebitis and venous thrombosis with or without embolism
Arterial thromboembolism
Pulmonary embolism
Myocardial infarction
Cerebral hemorrhage
Cerebral thrombosis
Hypertension
Gallbladder disease
Hepatic adenomas or benign liver tumors
There is evidence of an association between the following conditions and the use of oral contraceptives:
Mesenteric thrombosis
Retinal thrombosis
The following adverse reactions have been reported in patients receiving oral contraceptives and are believed to be drug-related:
Nausea
Vomiting
Gastrointestinal symptoms (such as abdominal cramps and bloating)
Breakthrough bleeding
Spotting
Change in menstrual flow
Amenorrhea
Temporary infertility after discontinuation of treatment
Edema
Melasma which may persist
Breast changes: tenderness, enlargement, secretion
Change in weight (increase or decrease)
Change in cervical erosion and secretion
Diminution in lactation when given immediately postpartum
Cholestatic jaundice
Migraine
Allergic reaction, including rash, urticaria, angioedema
Mental depression
Reduced tolerance to carbohydrates
Vaginal candidiasis
Change in corneal curvature (steepening)
Intolerance to contact lenses
The following adverse reactions have been reported in users of oral contraceptives and a causal association has been neither confirmed nor refuted:
Pre-menstrual syndrome
Cataracts
Changes in appetite
Cystitis-like syndrome
Headache
Nervousness
Dizziness
Hirsutism
Loss of scalp hair
Erythema multiforme
Erythema nodosum
Hemorrhagic eruption
Vaginitis
Porphyria
Impaired renal function
Hemolytic uremic syndrome
Acne
Changes in libido
Colitis
Budd-Chiari Syndrome
The following adverse reactions were also reported in clinical trials or during post-marketing experience: Gastrointestinal Disorders: diarrhea, pancreatitis; Musculoskeletal and Connective Tissue Disorders: muscle spasms, back pain; Reproductive System and Breast Disorders vulvovaginal pruritus, pelvic pain, dysmenorrhea, vulvovaginal dryness; Psychiatric Disorders: anxiety, mood swings, mood altered; Skin and Subcutaneous Tissue Disorders: pruritus, photosensitivity reaction; General Disorders and Administration Site Conditions: edema peripheral, fatigue, irritability, asthenia, malaise; Neoplasms Benign, Malignant, and Unspecified (Including Cysts and Polyps): breast cancer, breast mass, breast neoplasm, cervix carcinoma; Immune System Disorders: anaphylactic/anaphylactoid reaction; Hepatobiliary Disorders: hepatitis, cholelithiasis.
Overdosage
Serious ill effects have not been reported following acute ingestion of large doses of oral contraceptives by young children. 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 combined oral contraceptives are supported by epidemiological studies which largely utilized oral contraceptive formulations containing estrogen doses exceeding 0.035 mg of ethinyl estradiol or 0.05 mg mestranol.73–78
Effects on menses:
increased menstrual cycle regularity
decreased blood loss and decreased incidence of iron deficiency anemia
decreased incidence of dysmenorrhea
Effects related to inhibition of ovulation:
decreased incidence of functional ovarian cysts
decreased incidence of ectopic pregnancies
Other effects:
decreased incidence of fibroadenomas and fibrocystic disease of the breast
decreased incidence of acute pelvic inflammatory disease
decreased incidence of endometrial cancer
decreased incidence of ovarian cancer
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).
How Supplied / Storage and Handling
Necon® Tablets are available in a compact blister card (NDC 51862-892-01) containing 28 tablets, as follows: 21 light peach, biconvex round tablets with "D1" debossed on one side (0.5 mg norethindrone and 0.035 mg ethinyl estradiol) and 7 white, biconvex round tablets with "P" debossed on one side and the "N" on the other side containing inert ingredients.
Necon® Tablets are available in the following package configurations:
Carton of 1 NDC 51862-892-02
Carton of 3 NDC 51862-892-03
Carton of 6 NDC 51862-892-06
Store at 20° to 25°C (68° to 77°F); excursions permitted to 15° to 30°C (59° to 86°F) [See USP Controlled Room Temperature].
Rx Only
Patient Counseling Information
See Patient Labeling printed below.