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Dextromethorphan also undergoes N-demethylation (to 3-methoxymorphinan or MEM), [39] and partial conjugation with glucuronic acid and sulfate ions. Hours after dextromethorphan therapy, (in humans) the metabolites (+)-3-hydroxy-N-methylmorphinan, (+)-3-morphinan, and traces of the unchanged drug are detectable in the urine. [20]
Oral administration of dextromethorphan repeatedly during adolescence, however, has been shown to impair learning in those rats during adulthood. [22] The occurrence of Olney's lesions in humans, however, has not been proven or disproven.
NMDA receptor antagonists induce a state called dissociative anesthesia, marked by catalepsy, amnesia, and analgesia. [1] Ketamine is a favored anesthetic for emergency patients with unknown medical history and in the treatment of burn victims because it depresses breathing and circulation less than other anesthetics.
Ketamine’s antidepressant effects are part of what prompted researchers to explore other drugs that target glutamate—like the venerable cough suppressant dextromethorphan found in Robitussin ...
Dextromethorphan/bupropion has less activity as an NMDA receptor antagonist than dextromethorphan alone. [11] This is because bupropion is a potent CYP2D6 inhibitor and prevents the bioactivation of dextromethorphan into dextrorphan , a much more potent NMDA receptor antagonist and weaker serotonin reuptake inhibitor than dextromethorphan ...
The provider of a dextromethorphan containing product must acquire proof of age if they believe that the potential purchaser is below the age of 18. Any person found to possess more than one gram of pure dextromethorphan without the required credentials is subject to a $1000 fine for the first offense and a $2500 fine for each subsequent offense.
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