Cocaine risk profile

Cardiovascular risks

Dose-dependent tachycardia and hypertension

• Acute HR ↑ 11–20+ bpm; BP ↑ via ↑ myocardial O₂ demand
• Cocaine + ethanol: synergistic HR elevation (+20–40 bpm)
• Highest risk routes: IV and smoked (crack)

Cardiac arrhythmia {#arrhythmia} 4 mechanisms detailed in Cardiovascular signatures:

1. Sodium channel blockade (use-dependent → worsened by high HR)
2. Potassium channel blockade
3. Catecholamine excess
4. MI/myocarditis

Cardiomyopathy

• Direct myocardial toxicity + microvascular spasm (distinct from ischaemic MI)
• Cocaethylene worsens this significantly

Why β-blockers are contraindicated (acute cardiotoxicity)

• Cocaine → massive NE release → α1 vasoconstriction
• β-blocker removes β2 vasodilation counterbalance → unopposed alpha stimulation → worsens coronary vasoconstriction
• Theoretically sound mechanism; clinical evidence “limited and inconsistent” (Richards 2017)
• ACLS/ACS guidelines: do NOT recommend β-blockers
• Benzodiazepines preferred — address CNS hyperactivity without α/β imbalance
• Labetalol (combined α+β) is debated as a compromise

Cocaethylene risk

See Cocaethylene — formed with alcohol in ~92% of users; 18–25× ↑ sudden death risk; half-life 2–3× longer than cocaine; unique cardiotoxicity profile.

Neuropsychiatric risks

• Acute: impaired executive function, working memory, impulse control
• Post-binge: anhedonia, low motivation — see Cocaine crash
• Chronic: D2R downregulation → anhedonia correlates with relapse risk

No safe route claim

Every route carries cardiovascular risk. Intranasal is most common recreational route but carries risk of nasal damage. Smoked crack has fastest onset and highest addiction liability. IV carries highest immediate cardiotoxicity risk.

Related

Cocaine, Cocaethylene, Cardiovascular signatures, Cocaine crash, Cocaine peptide interactions