- Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, diabetes mellitus, or psychiatric illness/social situations that would limit compliance with study requirements. Specifically, for patients who are taking either or both oral hypoglycemics and insulin for diabetes mellitus will not be eligible as DCA in combination with these agents may increase the risk of clinically significant hypoglycemia, compromising patient safety.