Phase 4
Completed N=15
Emergency Contraception and Body Weight: Pilot Study
Contraception · Body Weight
Source: ClinicalTrials.gov NCT02408692 ↗
Enrolled (actual)
15
Serious AEs
0.0%
Results posted
Jun 2017
Primary outcomePrimary: Maximum Serum Concentration Between Normal and Obese BMI Women Ingesting 1.5mg Levonorgestrel — 10.3; 5.57 ng/mL
◆ Published Evidence
Established
75citations · ~8 / year
Impact of obesity on the pharmacokinetics of levonorgestrel-based emergency contraception: single and double dosing.
Summary
The purpose of this research study is to determine how body weight changes the drug level of an emergency contraceptive pill containing a hormone called levonorgestrel (LNG). This emergency contraceptive is available to women without a prescription, but has recently been found to not work as well to prevent pregnancies in women of higher body weight. The overall goal of this research is to improve the effectiveness of contraception for women, no matter their weight.
Linked Publications
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Impact of obesity on the pharmacokinetics of levonorgestrel-based emergency contraception: single and double dosing.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Maximum Serum Concentration Between Normal and Obese BMI Women Ingesting 1.5mg Levonorgestrel |
10.3; 5.57 | — |
| SECONDARY Maximum Serum Concentration Between Obese BMI Women Ingesting 1.5mg of Levonorgestrel and Then the Same Obese BMI Women Ingesting 3mg Levonorgestrel |
5.57; 10.52 | — |
Eligibility Criteria
Inclusion Criteria
- Subjects are between the ages of 18 and 35
- Subjects are in good general health
- Subjects have regular menstrual cycles (between 21 and 35 days)
- Subjects are willing to use condoms (if you are sexually active with a male partner), subjects are willing to not have sex with men during the study, or subjects have had a tubal ligation (or have a partner who has had a vasectomy) or subjects have a copper intrauterine device (IUD).
Exclusion Criteria
- Metabolic disorders including uncontrolled thyroid dysfunction and Polycystic Ovarian Syndrome
- Impaired liver or renal function
- Actively seeking or involved in a weight loss program (must be weight stable)
- Pregnancy, breastfeeding, or seeking pregnancy; recent (8 week) use of hormonal contraception
- Current use of drugs that interfere with metabolism of sex steroids
- Smokers.
Data sourced from ClinicalTrials.gov (NCT02408692) and the linked publication. Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.