An addiction medicine consultation team is reviewing multiple complex patient cases in the emergency department involving suspected acute intoxications. Match each distinct clinical presentation to the most likely responsible substance.
- 3,4-Methylenedioxymethamphetamine (MDMA)Increased sociability, bruxism, hyperthermia, and potentially severe hyponatremia due to increased antidiuretic hormone release and excessive free water intake.
- Synthetic cathinonesProfound agitation, combativeness, extreme tachycardia, and a uniquely prolonged delirium lasting up to several days, which is typically not detected on a standard urine toxicology screen.
- Gamma-hydroxybutyrate (GHB)Rapid onset of euphoria followed by abrupt, severe central nervous system and respiratory depression, alternating with sudden, unpredictable awakening and combativeness.
- Dextromethorphan (DXM)Dissociative state, ataxia, prominent nystagmus, and visual hallucinations, with the potential to cause a false-positive phencyclidine (PCP) result on standard screening.
Answer
MDMA matches with bruxism/hyponatremia; Synthetic cathinones match with prolonged delirium; GHB matches with rapid coma/awakening; Dextromethorphan matches with dissociative state/false-positive PCP.
Each substance produces a unique clinical toxidrome: MDMA is distinguished by hyponatremia and bruxism; synthetic cathinones by a remarkably prolonged severe agitated delirium; GHB by a deep but very brief coma; and DXM by dissociation and potential PCP cross-reactivity.
Step-by-Step Solution
Key Concept
Differentiating the unique acute toxidromes and clinical kinetics of specific illicit substances and over-the-counter drugs of abuse.
Estimated Time:1m 30s