ArticleJournal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques2026
Ketamine enhancement of dexmedetomidine attenuation of methamphetamine-induced agitation in rats.
Article in Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Methamphetamine (METH)-induced agitation, a major concern in acute METH intoxication, is currently treated with benzodiazepines. Due to current polysubstance use patterns in METH consumption, this treatment may fatally exacerbate respiratory depression produced by opioid adulterants or intentionally co-administered opioids. We previously showed that the α2-agonist dexmedetomidine (DEX), which does not potentiate opioid-induced respiratory depression in clinical practice, can be safely and effectively co-administered with naloxone to attenuate METH-induced agitation following naloxone reversal in METH-fentanyl co-intoxicated rats. While the unique arousability of DEX-induced sedation is clinically useful, the current study tested the safety and efficacy of DEX and adjunctive ketamine (KET) in producing deeper, less arousable sedation when needed (i.e., for severe agitation or to facilitate an intricate procedure). Fifteen minutes after 1 mg/kg METH administration in male rats (simulating treatment of naloxone-unmasked agitation with a delay), low-dose (0.032 mg/kg) DEX ± (56 mg/kg) KET, high-dose (0.18 mg/kg) DEX, or saline was administered. Key measurements included METH-induced locomotor activity (a rat model of agitation), the rat coma scale (a quantification of arousability), and α
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