Evidence map›Paper›PMID 9835504›Full record

ArticleAntimicrobial agents and chemotherapy1998

Possible mechanism by which the carbapenem antibiotic panipenem decreases the concentration of valproic acid in plasma in rats.

S Kojima, M Nadai, K Kitaichi, L Wang, T Nabeshima, T Hasegawa

Open access · bronzeAbstract read
In one paragraph

Article in Antimicrobial agents and chemotherapy, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
2.8field-weighted citation impact, top 10% 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

12 citing papers in PubMed, 54 citations in OpenAlex.

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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

6 authors at 5 institutions in 3 countries.

S KojimaDepartment of Hospital Pharmacy, Nagoya University School of Medicine, Nagoya 466,, Japan.
M Nadai
K Kitaichi
L Wang
T Nabeshima
T Hasegawa
Nagoya University Hospital · JPGifu Pharmaceutical University · JPNagoya University · JPRMIT University · AUWest China Medical Center of Sichuan University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

There is evidence indicating that the carbapenem antibiotic panipenem decreases plasma concentrations of valproic acid (VPA) in epileptic patients during VPA therapy. The mechanism for panipenem-induced changes in the pharmacokinetics of VPA was investigated in rats with and without bile duct cannulation. The effect of panipenem on the pharmacokinetics of diclofenac, which undergoes extensive enterohepatic recirculation, was also examined. VPA (50 mg/kg of body weight) or diclofenac (10 mg/kg of body weight) was administered intravenously under the steady-state plasma panipenem concentration of 4 microgram/ml, which had been achieved by a constant infusion rate. Panipenem decreased the plasma VPA concentrations in rats without bile duct cannulation but did not change the volume of the initial space and protein binding of VPA. However, panipenem had no effect on the plasma VPA concentrations and the biliary excretion of VPA in rats with bile duct cannulation. The secondary increase in plasma diclofenac concentration observed in the absence of panipenem was diminished in the presence of panipenem. These findings suggest that panipenem decreases plasma VPA concentrations by suppressing its enterohepatic recirculation, probably due to a panipenem-induced decrease in the numbers of enteric bacteria.

Indexed as

AnimalsAnticonvulsantsAnti-Inflammatory Agents, Non-SteroidalBileDiclofenacInjections, IntravenousMaleRatsRats, WistarThienamycinsValproic AcidAnticonvulsantsAnti-Inflammatory Agents, Non-SteroidalDiclofenacpanipenemThienamycinsValproic Acid

Identifiers

PMID9835504
PMCPMC106012
OpenAlexW2116866084

What OpenQuestion holds

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Registered trials

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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.