Professional Information — Ortho Tri-Cyclen Lo

Indications and Usage

ORTHO TRI-CYCLEN^® Lo Tablets are indicated for the prevention of pregnancy in women who elect to use oral contraceptives as a method of contraception.

In an active controlled clinical trial 1,673 subjects completed 11,003 cycles of ORTHO TRI-CYCLEN^® Lo use and a total of 20 pregnancies were reported in ORTHO TRI-CYCLEN^® Lo users.⁹⁹ This represents an overall use-efficacy (typical user efficacy) pregnancy rate of 2.36 per 100 women-years of use.

Oral contraceptives are highly effective for pregnancy prevention. Table 2 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, 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.

ORTHO TRI-CYCLEN^® Lo has not been studied for and is not indicated for use in emergency contraception.

Dosage and Administration

Oral Contraception

To achieve maximum contraceptive effectiveness, ORTHO TRI-CYCLEN^® Lo Tablets must be taken exactly as directed and at intervals not exceeding 24 hours. The possibility of ovulation and conception prior to initiation of medication should be considered. ORTHO TRI-CYCLEN^® Lo is available with the DIALPAK^® Tablet Dispenser which is preset for a Sunday Start. Day 1 Start is also provided.

Sunday Start

When taking ORTHO TRI-CYCLEN^® Lo the first white "active" tablet should be taken on the first Sunday after menstruation begins. If the menstrual period begins on Sunday, the first white "active" tablet should be taken that day. Take one white, light blue or dark blue "active" tablet daily for 21 days followed by one dark green "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 should be used until after the first 7 consecutive days of administration.

If the patient misses one (1) white, light blue, or dark blue "active" tablet in Weeks 1, 2, or 3, the tablet should be taken as soon as she remembers. If the patient misses two (2) white or light blue "active" tablets in Week 1 or Week 2, the patient should take two (2) "active" tablets the day she remembers and two (2) "active" 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 if she has sex in the seven (7) days after missing pills. If the patient misses two (2) dark blue "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 ORTHO TRI-CYCLEN^® Lo for the initial cycle of therapy is one white, light blue or dark blue "active" tablet administered daily from the 1st day through the 21st day of the menstrual cycle, counting the first day of menstrual flow as "Day 1" followed by one dark green "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) white, light blue, or dark blue "active" tablet in Weeks 1, 2, or 3, the tablet should be taken as soon as she remembers. If the patient misses two (2) white or light blue "active" tablets in Week 1 or Week 2, the patient should take two (2) "active" tablets the day she remembers and two (2) "active" 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 if she has sex in the seven (7) days after missing pills. If the patient misses two (2) dark blue "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).

When switching from another oral contraceptive, ORTHO TRI-CYCLEN^® Lo should be started on the same day that a new pack of the previous oral contraceptive would have been started.

The use of ORTHO TRI-CYCLEN^® Lo 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.)

Contraindications

Oral contraceptives should not be used in women who have any of the following conditions:

• Thrombophlebitis or thromboembolic disorders
• A past history of deep vein thrombophlebitis or thromboembolic disorders
• Cerebral vascular or coronary artery disease (current or history)
• Valvular heart disease with complications
• Severe hypertension
• Diabetes with vascular involvement
• Headaches with focal neurological symptoms
• Major surgery with prolonged immobilization
• Known or suspected carcinoma of the breast or personal history of breast cancer
• 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
• Hepatic adenomas or carcinomas
• Known or suspected pregnancy
• Hypersensitivity to any component of this product

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, and 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 the 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

Drug Interactions

Changes in contraceptive effectiveness associated with co-administration of other products

Contraceptive effectiveness may be reduced when hormonal contraceptives are coadministered with antibiotics, anticonvulsants, and other drugs that increase the metabolism of contraceptive steroids. This could result in unintended pregnancy or breakthrough bleeding. Examples include rifampin, barbiturates, phenylbutazone, phenytoin, carbamazepine, felbamate, oxcarbazepine, topiramate, griseofulvin and bosentan. Several cases of contraceptive failure and breakthrough bleeding have been reported in the literature with concomitant administration of antibiotics such as ampicillin and tetracyclines. However, clinical pharmacology studies investigating drug interaction between combined oral contraceptives and these antibiotics have reported inconsistent results.

Several of the anti-HIV protease inhibitors have been studied with co-administration of oral combination hormonal contraceptives; significant changes (increase and decrease) in the plasma levels of the estrogen and progestin have been noted in some cases. The safety and efficacy of oral contraceptive products may be affected with coadministration of anti-HIV protease inhibitors. Healthcare professionals should refer to the label of the individual anti-HIV protease inhibitors for further drug-drug interaction information.

Herbal products containing St. John's Wort (hypericum perforatum) may induce hepatic enzymes (cytochrome P450) and p-glycoprotein transporter and may reduce the effectiveness of contraceptive steroids. This may also result in breakthrough bleeding.

Concurrent use of bosentan and ethinyl estradiol containing products may result in decreased concentrations of these contraceptive hormones thereby increasing the risk of unintended pregnancy and unscheduled bleeding.

Increase in plasma ethinyl estradiol levels associated with co-administered drugs

Co-administration of atorvastatin and certain oral contraceptives containing ethinyl estradiol increase AUC values for ethinyl estradiol by approximately 20%. Ascorbic acid and acetaminophen may increase plasma ethinyl estradiol levels, possibly by inhibition of conjugation. CYP 3A4 inhibitors such as itraconazole or ketoconazole may increase plasma hormone levels.

Changes in plasma levels of co-administered drugs

Combination hormonal contraceptives containing some synthetic estrogens (e.g., ethinyl estradiol) may inhibit the metabolism of other compounds. Increased plasma concentrations of cyclosporin, prednisolone, and theophylline have been reported with concomitant administration of oral contraceptives. Decreased plasma concentrations of acetaminophen and increased clearance of temazepam, salicylic acid, morphine and clofibric acid, due to induction of conjugation, have been noted when drugs were administered with oral contraceptives.

Combined hormonal contraceptives have been shown to significantly decrease plasma concentrations of lamotrigine when co-administered due to induction of lamotrigine glucuronidation. This may reduce seizure control; therefore, dosage adjustments of lamotrigine may be necessary.¹⁰³

Healthcare professionals are advised to also refer to prescribing information of co-administered drugs for recommendations regarding management of concomitant therapy.

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.

Description

ORTHO TRI-CYCLEN^® Lo Tablets is a combination oral contraceptive containing the progestational compound norgestimate and the estrogenic compound ethinyl estradiol.

ORTHO TRI-CYCLEN^® Lo Tablets

Each white tablet contains 0.180 mg of the progestational compound, norgestimate (+)-13-Ethyl-17-hydroxy-18, 19-dinor-17α-pregn-4-en-20-yn-3-one oxime acetate (ester) and 0.025 mg of the estrogenic compound, ethinyl estradiol (19-nor-17α-pregna,1,3,5(10)-trien-20-yne-3,17-diol). Inactive ingredients include lactose, magnesium stearate, croscarmellose sodium, microcrystalline cellulose, carnauba wax, hypromellose, polyethylene glycol, titanium dioxide, and purified water.

Each light blue tablet contains 0.215 mg of the progestational compound norgestimate (+)-13-Ethyl-17-hydroxy-18, 19-dinor-17α-pregn-4-en-20-yn-3-one oxime acetate (ester) and 0.025 mg of the estrogenic compound, ethinyl estradiol (19-nor-17α-pregna,1,3,5(10)-trien-20-yne-3,17-diol). Inactive ingredients include FD & C Blue No. 2 Aluminum Lake, lactose, magnesium stearate, croscarmellose sodium, microcrystalline cellulose, carnauba wax, hypromellose, polyethylene glycol, titanium dioxide, and purified water.

Each dark blue tablet contains 0.250 mg of the progestational compound norgestimate (+)-13-Ethyl-17-hydroxy-18, 19-dinor-17α-pregn-4-en-20-yn-3-one oxime acetate (ester) and 0.025 mg of the estrogenic compound, ethinyl estradiol (19-nor-17α-pregna,1,3,5(10)-trien-20-yne-3,17-diol). Inactive ingredients include FD & C Blue No. 2 Aluminum Lake, lactose, magnesium stearate, croscarmellose sodium, microcrystalline cellulose, polysorbate 80, carnauba wax, hypromellose, polyethylene glycol, titanium dioxide, and purified water.

Each dark green tablet contains only inert ingredients, as follows: FD & C Blue No. 2 Aluminum Lake, lactose, magnesium stearate, pregelatinized starch, ferric oxide, hypromellose, polyethylene glycol, titanium dioxide, talc and purified water.

Clinical Pharmacology

Oral Contraception

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).

Receptor binding studies, as well as studies in animals and humans, have shown that norgestimate and 17-deacetyl norgestimate, the major serum metabolite, combine high progestational activity with minimal intrinsic androgenicity.^90–93 Norgestimate, in combination with ethinyl estradiol, does not counteract the estrogen-induced increases in sex hormone binding globulin (SHBG), resulting in lower serum testosterone.^90,91,94

PHARMACOKINETICS

Absorption

Norgestimate (NGM) and ethinyl estradiol (EE) are rapidly absorbed following oral administration. Norgestimate is rapidly and completely metabolized by first-pass (intestinal and/or hepatic) mechanisms to norelgestromin (NGMN) and norgestrel (NG), which are the major active metabolites of norgestimate. Mean pharmacokinetic parameters for NGMN, NG and EE during three cycles of administration of ORTHO TRI-CYCLEN^® Lo are summarized in Table 1. These results indicate that: (1) Peak serum concentrations of NGMN and EE were generally reached by 2 hours after dosing; (2) Accumulation following multiple dosing of the 180 mcg NGM / 25 mcg dose is approximately 1.5 to 2 fold for NGMN and approximately 1.5 fold for EE compared with single dose administration, in agreement with that predicted based on linear kinetics of NGMN and EE; (3) The kinetics of NGMN are dose proportional following NGM doses of 180 to 250 mcg; (4) Steady-state conditions for NGMN following each NGM dose and for EE were achieved during the three cycle study; (5) Non-linear accumulation (4.5–14.5 fold) of norgestrel was observed as a result of high affinity binding to SHBG, which limits its biological activity.¹⁰⁰ The effect of food on the pharmacokinetics of ORTHO TRI-CYCLEN^® Lo has not been studied.

Table 1 provides a summary of norelgestromin, norgestrel and ethinyl estradiol pharmacokinetic parameters.

Distribution

Norelgestromin and norgestrel (a serum metabolite of norelgestromin) are highly bound (>97%) to serum proteins. Norelgestromin is bound to albumin and not to SHBG, while norgestrel is bound primarily to SHBG. Ethinyl estradiol is extensively bound (>97%) to serum albumin.

Metabolism

Norgestimate is extensively metabolized by first-pass mechanisms in the gastrointestinal tract and/or liver. Norgestimate's primary active metabolite is norelgestromin. Subsequent hepatic metabolism of norelgestromin occurs and metabolites include norgestrel, which is also active and various hydroxylated and conjugated metabolites. Ethinyl estradiol is also metabolized to various hydroxylated products and their glucuronide and sulfate conjugates.

Excretion

Following 3 cycles of administration of ORTHO TRI-CYCLEN^® Lo, the mean (± SD) elimination half-life values, at steady-state, for norelgestromin, norgestrel and ethinyl estradiol were 28.1 (± 10.6) hours, 36.4 (± 10.2) hours and 17.7 (± 4.4) hours, respectively (Table 1). The metabolites of norelgestromin and ethinyl estradiol are eliminated by renal and fecal pathways.

Special Populations

Effects of Body Weight, Body Surface Area, and Age

The effects of body weight, body surface area, age and race on the pharmacokinetics of norelgestromin, norgestrel and ethinyl estradiol were evaluated in 79 healthy women using pooled data following single dose administration of NGM 180 or 250 mcg / EE 25 mcg tablets in four pharmacokinetic studies. Increasing body weight and body surface area were each associated with decreases in C_max and AUC_0–24h values for norelgestromin and ethinyl estradiol and increases in CL/F (oral clearance) for ethinyl estradiol. Increasing body weight by 10 kg is predicted to reduce the following parameters: NGMN C_max by 9% and AUC_0–24h by 19%, norgestrel C_max by 12% and AUC_0–24h by 46%, EE C_max by 13% and AUC_0–24h by 12%. These changes were statistically significant. Increasing age was associated with slight decreases (6% with increasing age by 5 years) in C_max and AUC_0–24h for norelgestromin and were statistically significant, but there was no significant effect for norgestrel or ethinyl estradiol. Only a small to moderate fraction (5–40%) of the overall variability in the pharmacokinetics of norelgestromin and ethinyl estradiol following ORTHO TRI-CYCLEN^® Lo Tablets may be explained by any or all of the above demographic parameters.

In clinical studies involving 1673 subjects with a mean weight of 141 pounds, there was no association between pregnancy and weight.

Renal and Hepatic Impairment

No studies with ORTHO TRI-CYCLEN^® Lo have been conducted in women with renal or hepatic impairment.

Drug-Drug Interactions

Although norelgestromin and its metabolites inhibit a variety of P450 enzymes in human liver microsomes, under the recommended dosing regimen, the in vivo concentrations of norelgestromin and its metabolites, even at the peak serum levels, are relatively low compared to the inhibitory constant (K_i).

Interactions between oral contraceptives and other drugs have been reported in the literature. No formal drug-drug interaction studies were conducted with ORTHO TRI-CYCLEN^® Lo (see PRECAUTIONS).

How Supplied / Storage and Handling

ORTHO TRI-CYCLEN^® Lo Tablets are available in a blister card (NDC 54868-4730-0) with a DIALPAK^® Tablet Dispenser (unfilled). The blister card contains 28 tablets. Each of the 7 white, round, convex, coated tablets imprinted "O-M" on one side and "180" on the other side contains 0.180 mg of the progestational compound, norgestimate, together with 0.025 mg of the estrogenic compound, ethinyl estradiol. Each of the 7 light blue, round, convex, coated tablets imprinted "O-M" on one side and "215" on the other side contains 0.215 mg of the progestational compound, norgestimate, together with 0.025 mg of the estrogenic compound, ethinyl estradiol. Each of the 7 dark blue, round, convex, coated tablets imprinted "O-M" on one side and "250" on the other side contains 0.250 mg of the progestational compound, norgestimate, together with 0.025 mg of the estrogenic compound, ethinyl estradiol. Each of the 7 dark green, round, convex, coated tablets imprinted "O-M" on one side and "P" on the other side contains inert ingredients.

Store at 25°C (77°F); excursions permitted to 15° – 30°C (59° – 86°F).

Protect from light.

Patient Counseling Information

See Patient Labeling printed below.