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Ketamine is a dissociative anesthetic and NMDA receptor antagonist used in clinical anesthesia and being actively investigated as a rapid-acting treatment for treatment-resistant depression. At sub-anesthetic doses it produces dissociative, analgesic, and psychedelic effects.
Dextromethorphan (DXM) is an NMDA receptor antagonist and sigma-1 receptor agonist found in many over-the-counter cough medications. At supra-therapeutic doses it produces dissociative and psychedelic states similar in character to ketamine and PCP.
The Synapedia Comparison Tool presents two psychoactive substances side by side — comparing pharmacological class, mechanisms of action, receptor profiles, and risk ratings. Similarities and differences become immediately visible.
Check drug interactions in the Interaction Checker or explore all substances in the Knowledge Graph.
The Substance Comparison is based on structured scientific data. It is intended for education only and does not include usage recommendations. All information does not replace medical advice.