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ToxicologyEmergencyCardiology

Calcium channel blocker overdose

Calcium, high-dose insulin euglycaemia and intralipid for severe calcium-channel-blocker poisoning.

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

Step 1 of ~6
warning

Highly lethal overdose

Non-dihydropyridines (verapamil, diltiazem) → bradycardia, AV block, severe hypotension. Dihydropyridines (amlodipine, nifedipine) → severe vasoplegic shock with reflex tachycardia. ABCDE; ITU referral; arterial line; central access if shocked. Bloods: VBG (lactate, glucose — typically high), U&E, troponin, ionised calcium. ECG. Decontamination: activated charcoal within 1 h; whole-bowel irrigation for SR/MR products after NPIS advice.

Related

Curated clinical cross-links plus same-class fallbacks.

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