Evidence map›Paper›PMID 29749261›Full record

ArticleThe Annals of pharmacotherapy2018

Analysis of Drug-Drug Interactions in Swiss Claims Data Using Tizanidine and Ciprofloxacin as a Prototypical Contraindicated Combination.

Annika M Jödicke, Ivanka Curkovic, Urs Zellweger, Ivan T Tomka, Thomas Neuer, Gerd A Kullak-Ublick, Malgorzata Roos, Marco Egbring

Open access · hybridAbstract read
In one paragraph

Article in The Annals of pharmacotherapy, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
0.4field-weighted citation impact, top 38% 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

2 citing papers in PubMed, 8 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

8 authors at 2 institutions in 1 country.

Annika M Jödicke1 Department of Clinical Pharmacology and Toxicology, University Hospital Zurich and University of Zurich, Switzerland.ORCID 0000-0002-0000-0110
Ivanka Curkovic1 Department of Clinical Pharmacology and Toxicology, University Hospital Zurich and University of Zurich, Switzerland.
Urs Zellweger4 Department of Client Services & Benefits, Helsana Group, Zurich, Switzerland.
Ivan T Tomka4 Department of Client Services & Benefits, Helsana Group, Zurich, Switzerland.
Thomas Neuer1 Department of Clinical Pharmacology and Toxicology, University Hospital Zurich and University of Zurich, Switzerland.
Gerd A Kullak-Ublick1 Department of Clinical Pharmacology and Toxicology, University Hospital Zurich and University of Zurich, Switzerland.
Malgorzata Roos5 EBPI, Department of Biostatistics, University of Zurich, Switzerland.
Marco Egbring1 Department of Clinical Pharmacology and Toxicology, University Hospital Zurich and University of Zurich, Switzerland.ORCID 0000-0002-4201-1483
University of Zurich · CHHelsana Group (Switzerland) · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPotential drug-drug interactions (pDDIs) are described in various case reports, but few studies have evaluated the impact of specific combinations on a population level.

objectiveTo analyze the type and frequency of multiple contraindicated (X-pDDIs) and major interactions (D-pDDIs) and to subsequently assess the impact of the particular combination of tizanidine and ciprofloxacin on outpatient physician visits and hospitalizations.

methodsAnonymized Swiss claims data from 524 797 patients in 2014-2015 were analyzed. First, frequencies of X- and D-pDDIs were calculated. Next, a retrospective cohort study was conducted among patients prescribed tizanidine and ciprofloxacin (exposed, n = 199) or tizanidine and other antibiotics (unexposed, n = 960). Hospitalizations and outpatient physician visits within 7, 14, and 30 days after initiation of antibiotic therapy were evaluated using multiple binary logistic regression and multiple linear regression.

resultsThe relative frequencies of X- and D-pDDIs were 0.4% and 6.65%, respectively. In the cohort study, significant associations between exposure to tizanidine and ciprofloxacin and outpatient physician visits were identified for 14 and 30 days (odds ratio [OR] = 1.61 [95% CI = 1.17-2.24], P = 0.004, and OR = 1.59 [95% CI = 1.1-2.34], P = 0.016). A trend for increased risk of hospitalization was found for all evaluated time periods (OR = 1.68 [95% CI = 0.84-3.17], OR = 1.52 [95% CI = 0.63-3.33], and OR = 2.19 [95% CI = 0.88-5.02]). Conclusion and Relevance: The interaction between tizanidine and ciprofloxacin is not only relevant for individual patients, but also at the population level. Further investigation of the impact of other clinically relevant DDIs is necessary to improve patient safety and reduce avoidable health care utilization.

Indexed as

Contraindications, DrugDatabases, FactualDrug InteractionsAdolescentAdultAgedAged, 80 and overAnti-Bacterial AgentsCiprofloxacinClonidineCohort StudiesDrug-Related Side Effects and Adverse ReactionsFemaleHospitalizationHumansInsurance Claim ReviewAnti-Bacterial AgentsCiprofloxacinClonidinetizanidineciprofloxacindrug interactionsdrug safetyhealth care utilizationmuscle relaxantspharmacoepidemiology

Identifiers

PMID29749261
PMCPMC6136070
OpenAlexW2800505777

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.