Poisoning:  Increased QT interval / QTc

þ Tricyclic antidepressants

þ Nonsedating antihistamines (Seldane=terfenadine, Hismanal=astermizole)
  per Medical Letter, 34(863), Feb 7 1992, even with only mild overdose (may
  lead to V Tach or toursades de pointes)

þ Lithium

þ Propulsid=cisapride

also found in some non-poisoning situations <EKG.TXT -QT>