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Non-dihydropyridine CCB

Verapamil hydrochloride

Brand names: Securon, Cordilox

Adult dose

Dose: PO IR: 40–120mg TDS. PO MR: 240mg OD-BD. SVT IV: 5mg over 2 min, may repeat after 5-10 min
Route: PO/IV
Frequency: OD-TDS

Clinical pearls

  • SVT, AF rate control, hypertension, angina
  • Avoid in HFrEF; constipation common

Contraindications

  • HF (LVEF reduced)
  • 2nd/3rd-degree AV block
  • Concurrent IV β-blocker
  • Severe hypotension
  • Atrial fibrillation with WPW
  • Cardiogenic shock

Side effects

  • Constipation
  • Bradycardia
  • Heart block
  • HF exacerbation
  • Hypotension
  • Gingival hyperplasia

Interactions

  • β-blockers (severe — avoid IV combination)
  • Digoxin (raises levels)
  • Statins
  • Strong CYP3A4 modulators

Monitoring

  • BP
  • HR
  • ECG

Reference: BNF; NICE NG196; ESC; https://bnf.nice.org.uk/drugs/verapamil-hydrochloride/. Verify against your local formulary and the latest BNF before prescribing.

Related

Curated clinical cross-links plus same-class fallbacks.