Independent directory Public ClinicalTrials.gov records United States
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ClinicalTrials.gov public records Last synced Jun 26, 2026, 4:47 PM EDT

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Showing 1–8 of 8 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Conditions
Drug Interactions, Human Immunodeficiency Virus
Interventions
Kaletra (lopinavir/ritonavir), African Potato (hypoxis obtusa)
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 60 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
San Francisco, California
Conditions
Healthy
Interventions
St. John's Wort
Drug
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
Not listed
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2000 – 2001
U.S. locations
1
States / cities
Bethesda, Maryland
Conditions
Healthy
Interventions
kava (Piper methysticum)
Drug
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001
U.S. locations
1
States / cities
Bethesda, Maryland
Conditions
Healthy Volunteers
Interventions
American ginseng
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older · Male only
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Baltimore, Maryland
Withdrawn No phase listed Observational Accepts healthy volunteers

Evaulation of Interaction Between Herbal Products and Anticoagulants

NCT00071682
Conditions
Coagulation Disorders
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
San Francisco, California
Conditions
Healthy
Interventions
Gingko Biloba, Echinacea purpurea, Panax ginseng
Drug
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 50 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2011
U.S. locations
1
States / cities
Bethesda, Maryland
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Ginkgo Biloba on Phenytoin Elimination

NCT00011063
Conditions
Healthy
Interventions
Ginkgo Biloba
Drug
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
Not listed
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001
U.S. locations
1
States / cities
Bethesda, Maryland
Conditions
Herbal Interaction
Interventions
Kratom, Oxycodone
Dietary Supplement · Drug
Lead sponsor
Washington State University
Other
Eligibility
21 Years to 45 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Spokane, Washington