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The Effects of multiple ingestion of Tien-cha (herb tea: Rubus suavissimus) on pharmacokinetics after single oral administration of 10 mg simvastatin, HMG-CoA reductase inhibiter, in healthy young male volunteers.- Open crossover design compared to water ingestion group -

The Effects of multiple ingestion of Tien-cha (herb tea: Rubus suavissimus) on pharmacokinetics after single oral administration of 10 mg simvastatin, HMG-CoA reductase inhibiter, in healthy young male volunteers.- Open crossover design compared to water ingestion group - - The effects of multiple ingestion of Tien-cha (herb tea: Rubus suavissimus) on pharmacokinetics after single oral administration of 10 mg simvastatin.

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-C000000038
Enrollment
8
Registered
2006-03-10
Start date
2005-02-01
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

healthy male volunteers

Interventions

Tien-cha ingection water ingestion

Sponsors

Second Department of Pharmacology, Showa University, School of Medicine
Lead Sponsor
Medical Corporation Keiyu-Kai Group, Obara Hospital
Collaborator

Eligibility

Sex/Gender
Male

Inclusion criteria

Inclusion criteria: 1.written informed consent 2.age 20<= <40 (on screening day) 3.male 4.BMI(Body Mass Index):18.5-25.0

Exclusion criteria

Exclusion criteria: 1.Any present status or medical history of circulatory system, respiratory system, digestive system, hemotogeneous system and renal function or hepatic function disorder 2.Any drug allergy history 3.Drug abuse, alcoholic abuse 4.Smoking habit 5.Participation in any clinical trial within 4 months 6.Collected blood more than 200mL within 3 months 7.Tien-cha ingestion in the 2 weeks prior to study drug administration 8.Grape fruits juice ingestion in the 2 weeks prior to study drug administration 9.Any use of St Johns wart in the 2 weeks prior to study drug administration 10.Any use of drugs including OTCs in the 2 weeks prior to study drug administration 11.Any clinically significant abnormalities on the results of screening examination which was conducted in 4 the weeks prior to study drug administration 12.Any clinically significant abnormalities on the examination which was conducted before study drug administration 13.Any use of prescribed medicines 14.Any presence or family history of inherited muscle disease (such as muscular dystrophy) 15.Subjects who, in the opinion of the investigator, are not likely to participate in the study for any reason

Design outcomes

Primary

MeasureTime frame
AUC, Cmax of plasma simvastatin

Secondary

MeasureTime frame
tmax, t1/2, CL/F of plasma simvastatin and safety assessment

Countries

Japan

Contacts

Public ContactNaoki UCHIDA, MD, PhD

Showa University, School of Medicine Second Department of Pharmacology

nuchida@med.showa-u.ac.jp03-3784-8128

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026