Psychiatrists and health agencies admit that long term data on ADHD drug effects is limited.   However, some long term research has linked the condition, and the use of drugs to treat it with Parkinson’s disease and other movement disorders.   University of Utah, correlated data with medical records checking ADHD disorder outcomes. Concluding people with ADHD were more than twice as likely to be diagnosed with a movement disorder, while those on stimulant drugs had an especia