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CYP2D6-inhibiting drugs and the increased risk of fall-related injuries due to newly initiated opioid treatment--a Swedish, register-based case-crossover study.

Abstract：

:It has been shown that newly initiated opioid therapy increases the risk of fall-related injuries. Yet, it remains to be determined whether drug-drug interactions can affect this negative effect, for instance with drugs inhibiting cytochrome P4502D6 (CYP2D6) that metabolizes codeine and also has a partial effect on tramadol and oxycodone. Our aim was to investigate how CYP2D6-inhibiting drugs contribute to explaining the risk of fall-related injuries for newly initiated opioid treatments with codeine, tramadol or oxycodone. Data from a Swedish national case-cross over study were revisited. This study identified a total of 167,257 fall-related injuries leading to hospitalization that occurred between 1 May 2006 and 31 December 2009 and linked information about dispensed drugs to them. Use of newly dispensed opioids in the 28 days before fall-related injury with and without CYP2D6-inhibiting drugs was compared with an earlier control period. For codeine, there was a two-times increased risk with concomitant CYP2D6-inhibiting drug use (OR, 1.76; 95% CI 1.40-2.20) and a three-times risk increase without (OR, 3.17; 95% CI 2.88-3.50). For tramadol, the risks were doubled when CYP2D6-inhibiting drugs were used (OR, 2.19; 95% CI 1.84-2.60) and tripled without their use (OR, 3.04; 95% CI 2.82-3.27). The risks were about the same for oxycodone, morphine, fentanyl and buprenorphine irrespective of CYP2D6-inhibiting drug use. In newly initiated opioid therapies, drug-drug interactions from concomitant use of CYP2D6-inhibiting drugs are associated with a lower risk of fall-related injury for codeine and tramadol that undergo metabolism via CYP2D6, but not for other opioids.

journal_name

Basic Clin Pharmacol Toxicol

journal_title

Basic & clinical pharmacology & toxicology

authors

Möller J,Laflamme L,Söderberg Löfdal K

doi

10.1111/bcpt.12289

subject

Has Abstract

pub_date

2015-02-01 00:00:00

pages

134-9

issue

eissn

1742-7835

issn

1742-7843

journal_volume

116

pub_type

杂志文章

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CYP2D6-inhibiting drugs and the increased risk of fall-related injuries due to newly initiated opioid treatment--a Swedish, register-based case-crossover study.