What is the appropriate treatment for extrapyramidal symptoms following haloperidol administration?

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Multiple Choice

What is the appropriate treatment for extrapyramidal symptoms following haloperidol administration?

Extrapyramidal symptoms from haloperidol come from dopamine blockade in the nigrostriatal pathway, which shifts the brain’s motor balance toward cholinergic activity. An anticholinergic agent helps restore that balance quickly, reducing muscle rigidity, tremors, or dystonic reactions. Diphenhydramine works in this scenario by providing central anticholinergic (muscarinic) effects, counteracting the excessive acetylcholine activity in the basal ganglia. In emergency care, it’s given rapidly by IV or IM and often relieves acute EPS promptly. Typical EMS dosing is around 25–50 mg, with repeat dosing per protocol if symptoms persist, while watching for sedation or anticholinergic side effects. Epinephrine, naloxone, and glucose don’t address the cholinergic excess seen in EPS, so they aren’t appropriate treatments for haloperidol-induced extrapyramidal symptoms.

Extrapyramidal symptoms from haloperidol come from dopamine blockade in the nigrostriatal pathway, which shifts the brain’s motor balance toward cholinergic activity. An anticholinergic agent helps restore that balance quickly, reducing muscle rigidity, tremors, or dystonic reactions.

Diphenhydramine works in this scenario by providing central anticholinergic (muscarinic) effects, counteracting the excessive acetylcholine activity in the basal ganglia. In emergency care, it’s given rapidly by IV or IM and often relieves acute EPS promptly. Typical EMS dosing is around 25–50 mg, with repeat dosing per protocol if symptoms persist, while watching for sedation or anticholinergic side effects.

Epinephrine, naloxone, and glucose don’t address the cholinergic excess seen in EPS, so they aren’t appropriate treatments for haloperidol-induced extrapyramidal symptoms.

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