Which class of medications most commonly causes neuroleptic malignant syndrome?

• A. Antipsychotics (especially first-generation)
• B. Antidepressants
• C. Benzodiazepines
• D. Opioids

Answer: (A)

Neuroleptic malignant syndrome is most strongly linked to medications that block dopamine receptors in the brain. Antipsychotics, especially the high-potency first-generation (typical) ones, are the class most commonly implicated because they produce intense dopamine D2 receptor blockade. This disruption in dopaminergic signaling, particularly in pathways that regulate movement and temperature, leads to the characteristic picture: severe muscle rigidity, high fever, autonomic instability, and changes in mental status. Stopping the antipsychotic and providing supportive care is essential, and treatments that oppose the dopamine blockade or reduce muscle activity (like dantrolene or bromocriptine) may be used if needed. Other drug classes listed—antidepressants, benzodiazepines, and opioids—do not typically cause the classic neuroleptic malignant syndrome pattern, though they can be associated with other adverse or syndromic reactions.