I performed my own search of pubmed, medline, epocrates, and the PDR without a single hit demostrating that sertraline, in isolation
, either prolongs the QT interval or causes
(2) I am likewise not aware of any cardiovascular effects when clonazepam is taken at properly prescribed doses. No medicine or combination of medicines are "perfectly safe". Getting out of bed in the morning is not perfectly safe. It's a dangerous world.