You want all the physical activity you can tolerate probably, but no more. It took me over ten years before I got any sort of warning I was doing too much when I was doing it. The warning is subtle but I heed it now.

It's probably best to keep all dosages as low as possible and to not use things that are no help. Even if a useless med isn't causing side effects it might interfere or change the operation of ones you need. Generally, start all new meds one at a time so you can gauge its effects.