Clinical trial

Effects of St. John's Wort on the Oral Contraceptive Hormone Levonorgestrel

NCT00131885 · University of Utah, Other · Completed

Key facts

NCT number NCT00131885
Title Effects of St. John's Wort on the Oral Contraceptive Hormone Levonorgestrel
Official title Effects of St. John's Wort on Levonorgestrel
Lead sponsor University of Utah, Other
Collaborators National Center for Complementary and Integrative Health (NCCIH) NIH
Status Completed
Phase Phase 4
Study type Interventional
Conditions Contraception
Intervention type Dietary Supplement, Drug
Interventions Placebo Control (Placebo Herb), St. John's Wort, Levonorgestrel
Enrollment 36
Start date Aug 1, 2005
Primary completion May 1, 2008
Completion May 1, 2008
First posted Aug 19, 2005
Last update posted Nov 13, 2023
Countries United States

At a glance

  • 1–9 Study sites
  • Yes Results posted
  • None Linked FDA submissions

Counts are shown as ranges. Exact figures, trends and every underlying record are available in Orca1.

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Source: U.S. National Library of Medicine (NLM), ClinicalTrials.gov · Source date:

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