I dont see how arnold and dwayne johnson can be on the juice for so many years and not have any negative effects on their health.
Rock will prolly tone it down in his mid to late 50s. Roids when done with proper guidance aren't really that big of a deal, its the OD to get super massive that can jack your heart up. Think about how big the rock is now compared to them early 2000s movies where he was slim.