TRIVORA- levonogestrel and ethinyl estradiol
Watson Pharma, Inc.
Patients should be counseled that this product does not protect against HIV infection (AIDS) and other sexually transmitted diseases.
DESCRIPTION
Each Trivora cycle of 28 tablets consists of three different drug phases as follows: Phase 1 comprised of 6 blue tablets, each containing 0.050 mg of levonorgestrel (d(-)-13 beta-ethyl-17-alpha-ethinyl-17-beta-hydroxygon-4-en-3-one), a totally synthetic progestogen, and 0.030 mg of ethinyl estradiol (19-nor-17α-pregna-1,3,5(10)-trien-20-yne-3, 17-diol); phase 2 comprised of 5 white tablets, each containing 0.075 mg levonorgestrel and 0.040 mg ethinyl estradiol; and phase 3 comprised of 10 pink tablets, each containing 0.125 mg levonorgestrel and 0.030 mg ethinyl estradiol; then followed by 7 peach inert tablets. The inactive ingredients present in the blue, white and pink tablets are lactose monohydrate, magnesium stearate, povidone and starch (corn). Each blue tablet also contains FD&C Blue #1. Each pink tablet also contains FD&C Red #40. Each inactive peach tablet contains the following inactive ingredients: anhydrous lactose, FD&C Yellow #6, lactose monohydrate, magnesium stearate and microcrystalline cellulose.
CLINICAL PHARMACOLOGY
Combination oral contraceptives primarily 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).
Pharmacokinetics
Absorption
Levonorgestrel is rapidly and completely absorbed after oral administration (bioavailability about 100%). Levonorgestrel is not subject to first-pass metabolism or enterohepatic circulation and therefore does not undergo variations in absorption after oral administration. Ethinyl estradiol is rapidly and almost completely absorbed from the gastrointestinal tract but, due to first-pass metabolism in gut mucosa and liver, the bioavailability of ethinyl estradiol is between 38% and 48%.
DOSAGE AND ADMINISTRATION
To achieve maximum contraceptive effectiveness, Trivora� Tablets (levonorgestrel and ethinyl estradiol tablets-triphasic regimen) must be taken exactly as directed and at intervals not exceeding 24 hours.
Trivora Tablets are a three-phase preparation plus 7 inert tablets. The dosage of Trivora Tablets is one tablet daily for 28 consecutive days per menstrual cycle in the following order: 6 blue tablets (phase 1), followed by 5 white tablets (phase 2), followed by 10 pink tablets (phase 3), plus 7 peach inert tablets, according to the prescribed schedule.
HOW SUPPLIED
Trivora� Tablets (levonorgestrel and ethinyl estradiol tablets-triphasic regimen) are available in 28-tablet blister cards. Six blister cards are packaged in a carton. Each cycle contains 28 tablets as follows:
Six blue tablets containing 0.05 mg of levonorgestrel and 0.03 mg of ethinyl estradiol. The blue tablets are unscored, round in shape with "WATSON" debossed on one side and "50/30" on the other side.
Five white tablets containing 0.075 mg of levonorgestrel and 0.04 mg of ethinyl estradiol. The white tablets are unscored, round in shape with "WATSON" debossed on one side and "75/40" on the other side.
Ten pink tablets containing 0.125 mg of levonorgestrel and 0.03 mg of ethinyl estradiol. The pink tablets are unscored, round in shape with "WATSON" debossed on one side and "125/30" on the other side.
Seven peach inert tablets. The peach inert tablets are unscored, round in shape with "WATSON" debossed on one side and "P1" on the other side.
Store at 20� - 25�C (68 � - 77�F). [See USP controlled room temperature.]
References available upon request.