A stressful lifestyle could lead to the premature death of a group of neurons, whose loss triggers the symptoms of Parkinson’s disease, according to a new study. Isradipine, a drug already approved for human use by the FDA, has been shown in preclinical studies to reduce the stress on these neurons and rejuvenate them. Scientists currently are conducting a clinical trial to find out if isradipine can be used safely and is tolerated by patients with Parkinson’s.