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ToxicologyEmergencyCardiology

β-blocker overdose

Bradycardia, hypotension and shock from β-blocker overdose — atropine, glucagon, high-dose insulin and intralipid.

Source: TOXBASE/NPIS; AACT/EAPCCT; ESC; BNF

Step 1 of ~7
warning

High-acuity overdose — early ITU involvement

Mechanisms: β1 blockade → bradycardia, ↓ contractility, AV block, hypotension. Lipophilic agents (propranolol) cross BBB → seizures, coma. Sotalol → QT prolongation and torsades. ABCDE; large-bore IV access x2; continuous ECG; arterial line if shocked. ITU referral early. Bloods: VBG, glucose (often low), U&E, troponin, lactate, paracetamol/salicylate. ECG.

Related

Curated clinical cross-links plus same-class fallbacks.

Decision support only. Always apply local guidelines and clinical judgement.