Another FDA document on QTc-prolongation: Draft Consensus Guideline: Safety Pharmacology Studies for Assessing the Potential for Delayed Ventricular Repolarization (QT Interval Prolongation) by Human Pharmaceuticals <A HREF="http://www.fda.gov/cder/guidance/4970dft.htm" target="_new">http://www.fda.gov/cder/guidance/4970dft.htm</A> -- Based on an FDA communication issued today (below), the above QTc guidance from 2002 has not been superseded. Source: Comprehensive List of Guidance Documents (updated) March 8, 2004: <A HREF="http://www.fda.gov/cder/guidance/guidlist.pdf" target="_new">http://www.fda.gov/cder/guidance/guidlist.pdf</A>