Evidence map›Paper›PMID 30022812›Full record

ArticleDrug design, development and therapy2018

Effect of green tea catechins on the pharmacokinetics of digoxin in humans.

Tae-Eun Kim, Kwang-Hee Shin, Jeong-Eun Park, Min-Gul Kim, Yeo-Min Yun, Dong-Hee Choi, Kyoung Ja Kwon, Jongmin Lee

Open access · goldAbstract read
In one paragraph

Article in Drug design, development and therapy, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
1.8field-weighted citation impact, top 15% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 37 citations in OpenAlex.

  1. Trial
  2. Effects of Green Tea Extract on Atorvastatin Pharmacokinetics in Healthy Volunteers.European journal of drug metabolism and pharmacokinetics · 2020
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  6. Practical compendium of antiarrhythmic drugs: a clinical consensus statement of the European Heart Rhythm Association of the European Society of Cardiology.Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 4 institutions in 1 country.

Tae-Eun KimDepartment of Clinical Pharmacology, Konkuk University Medical Center, Seoul, Republic of Korea.
Kwang-Hee ShinDepartment of Pharmacotherapy & Translational Research, College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea.
Jeong-Eun ParkDepartment of Pharmacotherapy & Translational Research, College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea.
Min-Gul KimDepartment of Pharmacology, Chonbuk National University Medical School, Jeonju, Jeonbuk, Republic of Korea.
Yeo-Min YunDepartment of Laboratory Medicine, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Republic of Korea.
Dong-Hee ChoiDepartment of Medical Science, Konkuk University School of Medicine, Seoul, Republic of Korea.
Kyoung Ja KwonDepartment of Medical Science, Konkuk University School of Medicine, Seoul, Republic of Korea.
Jongmin LeeDepartment of Rehabilitation Medicine, Konkuk University School of Medicine, Seoul, Republic of Korea, leej@kuh.ac.kr.
Konkuk University · KRKyungpook National University · KRJeonbuk National University · KRKonkuk University Medical Center · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPrevious in vitro studies have reported the inhibitory effect of green tea on p-glycoprotein (p-gp) encoded by

methodsSixteen healthy volunteers participated in this study. At Day 1, 0.5 mg of digoxin was administered via oral route. After a 14-day washout period, 630 mg of green tea catechins (GTC) was administered via oral route, followed by 0.5 mg of digoxin 1 hour later. From Day 16 through Day 28, 630 mg of GTC was administered alone. At Day 29, 630 mg of GTC and 0.5 mg of digoxin were administered in the same way as Day 15. Blood samples for the pharmacokinetic assessments of digoxin were collected up to 8 hours after each dose. Pharmacokinetic parameters were estimated by noncompartmental analysis. Area under the curve (AUC) and peak plasma concentration (

resultsFifteen subjects completed the study. Compared to digoxin alone, the concomitant administration of digoxin and GTC significantly reduced the systemic exposure of digoxin: geometric mean ratios (GMR) and 90% confidence intervals (CI) of area under the concentration-time curve from time 0 to the last measurable time (AUC

conclusionThis study demonstrates that the coadministration of GTC reduces the systemic exposure of digoxin regardless of pretreatment of GTC.

Indexed as

Administration, OralAdultATP Binding Cassette Transporter, Subfamily BATP Binding Cassette Transporter, Subfamily B, Member 1CatechinDigoxinFemaleHealthy VolunteersHumansMaleMiddle AgedPlant ExtractsRepublic of KoreaTeaYoung AdultABCB1 protein, humanATP Binding Cassette Transporter, Subfamily BATP Binding Cassette Transporter, Subfamily B, Member 1CatechinDigoxinPlant ExtractsTeacatechindigoxindrug interactiongreen teap-glycoproteinpharmacokinetics

Identifiers

PMID30022812
PMCPMC6044363
OpenAlexW2831894539

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.