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Pharmaceutical Treatment for Chronic Pain (2)Weak Opioid Analgesics Keiko YAMADA 1,2 , Masako ISEKI 1,2 1Department of Pain Medicine, Juntendo University Graduate School of Medicine 2Department of Anesthesiology and Pain Medicine, Juntendo University Faculty of Medicine Keyword: weak opioid analgesics , chronic pain , proper use of pharmaceutical products pp.215-221
Published Date 2023/3/10
DOI https://doi.org/10.18916/masui.2023030007
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 As of 2022, weak opioid analgesics with weak agonist effects on opioid receptors are codeine phosphate, tramadol(oral), and buprenorphine(patch), all of which are covered by health insurance for chronic non-cancer pain. Weak opioids are classified by the World Health Organization(WHO)as analgesics for weak to moderate pain. They are not designated as narcotics or psychotropics under pharmaceutical regulations because they are less to develop physically dependent than strong opioid analgesics(“strong opioids”). Tramadol, which is not classified as a narcotic or psychotropic drug under pharmaceutical regulations because it is less likely to develop physical dependence than strong opioid analgesics(“strong opioids”), was released in Japan relatively recently, and is now widely available as an oral drug for the treatment of chronic noncancer pain. On the other hand, weak opioids are easier to prescribe and more readily available than strong opioids, and their inappropriate use, with such as dependence and addiction, has become a worldwide problem, although there is insufficient evidence regarding the safety of long-term use. This paper describes the current status and issues of weak opioids indicated for the treatment of chronic non-cancer pain.


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電子版ISSN 印刷版ISSN 0021-4892 克誠堂出版

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