Forskning ved Københavns Universitet - Københavns Universitet

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Morfinmetabolisme-farmakokinetik og-dynamik

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

With the increasing use of morphine, growing interest for the clinical implications of its metabolites, morphine-3-glucuronide (M-3-G) and morphine-6-glucuronide (M-6-G) has emerged in the literature. M-6-G binds to the opioid receptor and has analgesic properties in man. Clinical studies have not delivered strong evidence of significant correlation between the concentration of morphine and its glucuronides in plasma and cerebrospinal fluid and pharmacodynamics such as analgesia. There is no clinical evidence to indicate that M-6-G has a pronounced respiratory depressing effect in man, while the literature contains conflicting reports with regard to other side-effects. M-3-G does not bind to the m-opioid receptor and consequently has no antinociceptive effects. Studies in rodents have shown that morphine, M-6-G and especially M-3-G may induce hyperalgesia, allodynia and myoclonus. It is assumed that these side effects are caused by a spinal antiglycinergic mechanism. The role of M-3-G in morphine antagonism and development of tolerance has not yet been settled. As M-3-G and M-6-G are eliminated by the kidneys, renal insufficiency will lead to accumulation of these. Accordingly dosage should be reduced or other opioids be considered in such cases.
OriginalsprogDansk
TidsskriftUgeskrift for Laeger
Vol/bind159
Udgave nummer22
Sider (fra-til)3383-6
Antal sider4
ISSN0041-5782
StatusUdgivet - 26 maj 1997

    Forskningsområder

  • Humans, Morphine, Receptors, Opioid, mu

ID: 46098790