Codeine, sulfate

Codeine, sulfate - the sulfate salt form of codeine, a naturally occurring phenanthrene alkaloid and opioid agonist with analgesic, antidiarrheal and antitussive activity. Codeine sulfate mimics the actions of opioids by binding to the opioid receptors at many sites within the central nervous system (cns). Stimulation of the mu subtype opioid receptor stimulates the exchange of gtp for gdp on the g protein complex and subsequently inhibits adenylate cyclase. This results in a decrease in intracellular camp and leads to a reduction in the release of neurotransmitters such as substance p, gaba, dopamine, acetylcholine and noradrenaline. The analgesic effect of codeine sulfate is likely due to its metabolite morphine, which induces opening of g protein coupled inwardly rectifying potassium (girk) channels and blocks the opening of n type voltage gated calcium channels, thereby resulting in hyperpolarization and reduced neuronal excitability.

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Source: Data courtesy of the U.S. National Library of Medicine. Since the data might have changed, please query MeSH on Codeine, sulfate for any updates.