Answer
During treatment with prochlorperazine mesilate (Stemetil injection), QT prolongation increases the risk of serious ventricular arrhythmias of the torsade de pointes type, which can cause sudden death.
Sources for this answer
- Stemetil 12.5mg/ml InjectionAtnahs Pharma UK Ltd · emc · SmPC §4.4 Special warnings and precautions for use · Version 1Document updated
Sources checked