A Drug Interaction Study of Folic Acid and Oral Contraceptive Tablets Containing Norgestimate (NGM) /Ethinyl Estradiol (EE) in Healthy Women.

Johnson & Johnson (J&J)

Status and phase

Completed

Phase 1

Conditions

Healthy

Drug Interactions

Pharmacokinetics

Treatments

Drug: Norgestimate; Ethinyl Estradiol; Folic acid

Study type

Interventional

Funder types

Industry

Identifiers

NCT00709982

CR002380

Details and patient eligibility

About

The purpose of the study is to assess the effect of folic acid administration on the blood level and the breakdown products of OC study drug (250 mcg norgestimate[NGM]/35 mcg Ethinyl Estradiol [EE]) tablets. The effect of study drug tablet intake on the blood level of folic acid is also determined.

Full description

This is a single-center, open-label, pharmacokinetic drug interaction study between folic acid (1 mg) and study drug (250 mcg NGM/35 mcg EE) in 2 groups of at least 20 healthy women each. In Group 1, a single oral dose of 250 mcg NGM/35 mcg EE study drug was administered to the healthy volunteers at the study site on Days 1 and 17 and folic acid 1 mg was administered orally on Days 4 to 18; in Group 2, folic acid 1 mg was administered orally on Days 1 and 17 at the study site and 1 tablet of study drug was administered on Days 2 to 17. Blood samples were collected at specified times for 72 hours postdose on Days 1 and 17 for the healthy volunteers in Group 1 for determination of blood levels of norelgestromin (NGMN), and norgestrel (NG) [the active breakdown product of NGM], and EE. For the healthy volunteers in Group 2, blood samples were collected for 24 hours after the folic acid dose on Days 1 and 17 for determination of plasma levels of total folates. Safety was evaluated based on the following: the incidence, type and severity of adverse events; clinical laboratory tests; vital sign and electrocardiogram (ECGs) measurements; and physical examinations. Oral temperature, pulse, respiratory rate, and sitting blood pressure (BP) were taken before dosing on Days 1 and 17. For Group 1, measurements were taken before and at least 15 minutes after the 24-hour (Days 2 and 18), 48-hour (Days 3 and 19), and 72-hour (Day 4) pharmacokinetic blood draw; and at study completion (Day 20) or early withdrawal. For Group 2, measurements were taken before and at least 15 minutes after the 24-hour pharmacokinetic blood draw on Days 2 and 18; and at study completion (Day 18) or early withdrawal. Physical and gynecologic examinations and 12-lead ECGs were performed at screening and at study completion or early withdrawal. Blood samples for blood chemistry, hematology, and urine samples for urinalysis were collected at the screening visit and at the follow-up visit or early withdrawal.

Oral contraceptives tablet (250 mcg NGM/35 mcg EE); Folic acid tablet (1 mg). In Group 1, a single oral dose of (250 mcg NGM/35 mcg EE) study drug was administered on Days 1 and 17 and folic acid 1 mg was administered orally on Days 4 to 18; in Group 2, folic acid 1 mg was administered orally on Days 1 and 17 and 1 tablet of study drug was administered on Days 2 to 17. Study drugs were taken with 240 mL (8 oz) of water at approximately 8:00 a.m.

Enrollment

47 patients

Sex

Female

Ages

18 to 45 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

Healthy, nonpregnant, nonlactating, nonsmoking women, weighing at least 110 pounds
With regular menstrual cycles
A body mass index between 16 and 29.9 kg/m2
And having a hematocrit of at least 36%

Exclusion criteria

History or presence of disorders commonly accepted as contraindications to sex hormonal therapy including: thromboembolic disorders' cerebral vascular or coronary artery disease, chronic untreated hypertension, or migraines, benign or malignant liver tumor that developed during the use of OC
Known or suspected estrogen-dependent neoplasia
Presence of disorders commonly accepted as contraindications to combined OC including: undiagnosed abnormal vaginal bleeding, any neurovascular lesion of the eye or serious visual disturbance, or liver disease
Intake any multivitamin or folic acid-containing supplements within 21 days before study admission
Used a steroid hormone-containing intrauterine device within 3 months before study admission
Used any medications that were known cytochrome P-450 enzyme inducers or inhibitors (e.g., St. John's Wort, cimetidine or rifampin), within 60 days before dosing