Hi John,
Thanks for starting this post.
My question to you and others is do any of you find opening a new bottle of tablets for PD works better with your symptoms?
I find with either Stalevo or Sinemet I feel better and have a better on when I've broken the seal and started taking new tablets.
At first I thought it was a coincidence however it seems to happen each time.
Now I'm more likely to be careful to know when I open e.g. a pill bottle I keep in my handbag for going out how old the tablets are.