Answer
Yes, tetrabenazine causes a small increase of up to 8 milliseconds in the corrected QT interval and requires caution with other QT-prolonging drugs, congenital long QT syndromes or a history of cardiac arrhythmias.
Sources for this answer
- Tetrabenazine 25 mg TabletsRanbaxy (UK) Limited a Sun Pharmaceutical Company · emc · SmPC §4.4 Special warnings and precautions for use · Version 6Document updated
Sources checked