Answer
Sotalol should not be combined with verapamil or diltiazem because additive effects on atrioventricular conduction and ventricular function can cause hypotension, bradycardia, conduction defects and cardiac failure.
Sources for this answer
- Sotalol 80mg TabletsAurobindo Pharma - Milpharm Ltd. · emc · SmPC §4.5 Interaction with other medicinal products · Version 7Document updated
Sources checked