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Drug Interactions with the Potential to Prevent Prodrug Activation as a Common Source of Irrational Prescribing in Hospital Inpatients by TIRKKONEN, T; LAINE, K is a Medicine article available to read on EtoBox.

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## Objective: Our objective was to investigate the frequency of potential drug-drug interactions between the prodrugs losartan, codeine, and tramadol and drugs known to inhibit their activation in hospitalized patients. ## Methods: The frequency of coadministration between losartan and well-established cytochrome p450 (cyp) 2c9 inhibitors, as well as codeine and tramadol and cyp2d6 inhibitors, was studied by use of data from a university hospital medication database. the study population comprised all patients treated in internal medicine, pulmonary medicine, oncology, and neurology wards (105,533 treatment periods and 65,526 patients) between july 1, 1996, and june 30, 2002 (6 years). ## Results: Every fifth patient receiving losartan, codeine, or tramadol was concomitantly taking another drug that has the potential to inhibit the activation of these drugs. during the 6-year time period, 1999 patients were exposed to a potential interaction. interactions occurred more commonly in internal medicine wards (odds ratio, 2.3; 95% confidence interval, 2.1-2.5) and in women (odds ratio, 1.5; 95% confidence interval, 1.4-1.7). ## Conclusions: Coadministration of drugs that potentially res

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Author

TIRKKONEN, T; LAINE, K

Publisher

Nature Publishing Group; Wiley (Blackwell Publishing); Wiley-Blackwell; Wiley; Springer Science and Business Media LLC; Research Square (ISSN 0009-9236)

Published

2004

Language

EN

Field

Medicine (Health Sciences)