Cocaine-Induced Chest Pain / MI

Cocaine-induced chest pain sits at the intersection of pharmacology, pathophysiology, and emergency management — and USMLE Step 1 exploits all three angles. Students consistently reach for beta-blockers in cocaine chest pain because the patient is tachycardic and hypertensive, but beta-blockade leaves alpha-adrenergic vasoconstriction unopposed, intensifying coronary spasm and worsening hypertension — the exact opposite of what you want. The core concept is that cocaine acts as a powerful sympathomimetic (blocks catecholamine reuptake) while simultaneously acting as a sodium channel blocker, producing a clinical picture that looks like ACS but requires a fundamentally different management approach. The exam will give you a young patient with chest pain, tachycardia, hypertension, and either a history of cocaine use or subtle hints like pupil dilation and diaphoresis — and then ask you to pick the next best step or identify the contraindicated drug.

What makes this topic tricky is that the standard ACS reflex gets you into trouble here. Students who pattern-match to 'chest pain + tachycardia + hypertension = give beta-blocker' will pick the wrong answer. The exam specifically targets this reflex. Similarly, most students know vasospasm is involved but stop there — the full picture includes thrombosis and increased oxygen demand simultaneously, which matters for understanding why multiple drug classes are needed.

The management sequence is the highest-yield piece: benzodiazepines first (to cut central sympathomimetic drive), then nitrates and aspirin, with beta-blockers explicitly contraindicated. USMLE Step 1 has tested this contraindication repeatedly because it requires you to reason through mechanism rather than memorize a drug list. If you understand why unopposed alpha stimulation is dangerous, you won't need to memorize the contraindication — you'll derive it.