This came out today...
parkinsonsnewstoday.com/new...
"When statins or NSAIDs were used after Parkinson’s symptoms had begun, patients still experienced a significant delay in disease onset compared with those who had never taken them, although to a lesser degree than when the medications were taken before symptom onset. Statins resulted in a delay of 3.8 years, while NSAIDs delayed onset by 2.7 years."