Decreased Analgesic Effect of Tramadol in Japanese Patients with CYP2D6 Intermediate Metabolizers after Orthopedic Surgery

Tramadol is metabolized by CYP2D6 to an active metabolite, which in turn acts as an analgesic. This study aimed to investigate the impact of CYP2D6 genotype on the analgesic effect of tramadol in clinical practice. A retrospective cohort study was performed in patients treated with tramadol for post...

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Veröffentlicht in:Biological & pharmaceutical bulletin 2023/07/01, Vol.46(7), pp.907-913
Hauptverfasser: Kamiya, Takaki, Hira, Daiki, Nakajima, Ryo, Shinoda, Kazuha, Motomochi, Atsuko, Morikochi, Aya, Ikeda, Yoshito, Isono, Tetsuichiro, Akabane, Michiya, Ueshima, Satoshi, Kakumoto, Mikio, Imai, Shinji, Morita, Shin-ya, Terada, Tomohiro
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container_title Biological & pharmaceutical bulletin
container_volume 46
creator Kamiya, Takaki
Hira, Daiki
Nakajima, Ryo
Shinoda, Kazuha
Motomochi, Atsuko
Morikochi, Aya
Ikeda, Yoshito
Isono, Tetsuichiro
Akabane, Michiya
Ueshima, Satoshi
Kakumoto, Mikio
Imai, Shinji
Morita, Shin-ya
Terada, Tomohiro
description Tramadol is metabolized by CYP2D6 to an active metabolite, which in turn acts as an analgesic. This study aimed to investigate the impact of CYP2D6 genotype on the analgesic effect of tramadol in clinical practice. A retrospective cohort study was performed in patients treated with tramadol for postoperative pain after arthroscopic surgery for rotator cuff injury during April 2017–March 2019. The impact of CYP2D6 genotypes on the analgesic effects was assessed by the numeric rating scale (NRS) pain scoring and analyzed by the Mann–Whitney U test. Stepwise multiple linear regression analysis was performed to identify predictive factors for the area under the time-NRS curve (NRS-AUC), which was calculated using the linear trapezoidal method. Among the 85 enrolled Japanese patients, the number of phenotypes with CYP2D6 normal metabolizer (NM) and intermediate metabolizer (IM) was n = 69 (81.1%) and n = 16 (18.9%), respectively. The NRS and NRS-AUC in the IM group were significantly higher than those in the NM group until Day 7 (p 
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This study aimed to investigate the impact of CYP2D6 genotype on the analgesic effect of tramadol in clinical practice. A retrospective cohort study was performed in patients treated with tramadol for postoperative pain after arthroscopic surgery for rotator cuff injury during April 2017–March 2019. The impact of CYP2D6 genotypes on the analgesic effects was assessed by the numeric rating scale (NRS) pain scoring and analyzed by the Mann–Whitney U test. Stepwise multiple linear regression analysis was performed to identify predictive factors for the area under the time-NRS curve (NRS-AUC), which was calculated using the linear trapezoidal method. Among the 85 enrolled Japanese patients, the number of phenotypes with CYP2D6 normal metabolizer (NM) and intermediate metabolizer (IM) was n = 69 (81.1%) and n = 16 (18.9%), respectively. The NRS and NRS-AUC in the IM group were significantly higher than those in the NM group until Day 7 (p &lt; 0.05). The multiple linear regression analysis indicated that the CYP2D6 polymorphism was a prediction factor of the high NRS-AUC levels in Days 0–7 (β = 9.52, 95% CI 1.30–17.7). In IM patients, the analgesic effect of tramadol was significantly reduced one week after orthopedic surgery in clinical practice. 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The multiple linear regression analysis indicated that the CYP2D6 polymorphism was a prediction factor of the high NRS-AUC levels in Days 0–7 (β = 9.52, 95% CI 1.30–17.7). In IM patients, the analgesic effect of tramadol was significantly reduced one week after orthopedic surgery in clinical practice. 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pharmaceutical bulletin</jtitle><addtitle>Biol Pharm Bull</addtitle><date>2023-07-01</date><risdate>2023</risdate><volume>46</volume><issue>7</issue><spage>907</spage><epage>913</epage><pages>907-913</pages><artnum>b23-00030</artnum><issn>0918-6158</issn><eissn>1347-5215</eissn><abstract>Tramadol is metabolized by CYP2D6 to an active metabolite, which in turn acts as an analgesic. 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The multiple linear regression analysis indicated that the CYP2D6 polymorphism was a prediction factor of the high NRS-AUC levels in Days 0–7 (β = 9.52, 95% CI 1.30–17.7). In IM patients, the analgesic effect of tramadol was significantly reduced one week after orthopedic surgery in clinical practice. Therefore, dose escalation of tramadol or the use of alternative analgesic medications can be recommended for IM patients.</abstract><cop>Japan</cop><pub>The Pharmaceutical Society of Japan</pub><pmid>37394642</pmid><doi>10.1248/bpb.b23-00030</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record>
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subjects Analgesics
Bone surgery
Clinical medicine
CYP2D6
CYP2D6 protein
Cytochrome P450
Gene polymorphism
Orthopedics
Pain
Patients
pharmacodynamics
Phenotypes
polymorphism
precision medicine
Regression analysis
Surgery
Tramadol
title Decreased Analgesic Effect of Tramadol in Japanese Patients with CYP2D6 Intermediate Metabolizers after Orthopedic Surgery
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