Morphine-3-glucuronide

{{chembox | Verifiedfields = changed | verifiedrevid = 462255487 | ImageFile = Morphine-3-glucuronide.svg | ImageClass = skin-invert-image | ImageSize = 250px | IUPACName = 6α-Hydroxy-17-methyl-7,8-didehydro-4,5α-epoxymorphinan-3-yl β-D-glucopyranosiduronic acid | SystematicName = (2S,3S,4S,5R,6S)-3,4,5-Trihydroxy-6-{[(4R,4aR,7S,7aR,12bS)-7-hydroxy-3-methyl-2,3,4,4a,7,7a-hexahydro-1H-4,12-methano[1]benzofuro[3,2-e]isoquinolin-9-yl]oxy}oxane-2-carboxylic acid | OtherNames = |Section1= |Section2= |Section3= }}

Morphine-3-glucuronide is a metabolite of morphine produced by UGT2B7. It is not active as an opioid agonist, but does have some action as a convulsant, which does not appear to be mediated through opioid receptors, but rather through interaction with glycine and/or GABA receptors. As a polar compound, it has a limited ability to cross the blood–brain barrier, but kidney failure may lead to its accumulation and result in seizures. Probenecid and inhibitors of P-glycoprotein can enhance uptake of morphine-3-glucuronide and, to a lesser extent, morphine-6-glucuronide. Reported side effects related to the accumulation of this metabolite include convulsions, agitation, hallucinations, hyperalgesia, and coma.