Simon 2-Stage futility trial design is feasible for early Parkinson's disease treatments, potentially accelerating discovery of new treatments by reducing time, cost, and sample size. The design uses an interim analysis to stop ineffective treatments early, focusing on a 12-month follow-up and a five-point worsening on the UPDRS motor score as primary outcome. However, it has limitations like longer recruitment periods and a higher probability of falsely stopping trials.