REPORT FROM THE AMERICAN ACADEMY OF NEUROLOGY (AAN) ANNUAL MEETING, NEW ORLEANS LA, APRIL 21-28, 2012 – The recommended doses of carbidopa (CD) to increase levodopa availability are in the range of 75-200 mg/day. A small double-blind crossover trial has explored whether higher carbidopa doses are clinically useful (Nutt et al. AAN 2012; abstract S02.006).