Aubra EQ

Generic name:levonorgestrel and ethinyl estradiol
Dosage form: tablets
Drug class:Contraceptives

Medically reviewed by Drugs.com. Last updated on Mar 1, 2022.

Aubra EQ Description

Each active, white tablet (21) contains 0.1 mg of levonorgestrel USP, d(-)-13β-­ethyl-17α- ethinyl-17β-hydroxygon-4-en-3-one, a totally synthetic progestogen, and 0.02 mg of ethinyl estradiol USP, 17α-ethinyl-1,3,5(10)-estratriene-3, 17β-diol. The inactive ingredients present are croscarmellose sodium, lactose monohydrate, magnesium stearate, microcrystalline cellulose, and povidone.

Each inactive, green tablet (7) contains the following inactive ingredients: croscarmellose sodium, FD & C Blue No. 2 Aluminum Lake, ferric oxide (sicovit yellow 10), lactose anhydrous, magnesium stearate, microcrystalline cellulose, and povidone.

Aubra EQ - Clinical Pharmacology

Mode of Action

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).

Pharmacokinetics

Absorption

No specific investigation of the absolute bioavailability of Aubra EQ in humans has been conducted. However, literature indicates that levonorgestrel is rapidly and completely absorbed after oral administration (bioavailability about 100%) and is not subject to first-pass metabolism. 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%.

After a single dose of Aubra EQ to 22 women under fasting conditions, maximum serum concentrations of levonorgestrel are 2.8 ± 0.9 ng/mL (mean ± SD) at 1.6 ± 0.9 hours. At steady state, attained from day 19 onwards, maximum levonorgestrel concentrations of 6.0