Toxicology USMLE Step 1 Practice Question
A 32-year-old man presents to the emergency department with acute chest pain, severe agitation, and mydriasis after cocaine use. Vital signs show BP 185/110 mmHg, HR 128/min, RR 22/min, and temperature 38.2°C. Troponin is elevated at 0.8 ng/mL; ECG demonstrates ST-segment elevation. He denies prior cardiac history or current beta-blocker use. Which medication should be avoided as monotherapy due to unopposed alpha-adrenergic stimulation?
Answer choices
- ANitroglycerin
- BBenzodiazepines
- CPure beta blockerCorrect answer
- DAspirin
- EPhentolamine
- FCalcium channel blocker
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