I have been trying the Bach's rescue spray for several days and I think it helps. I have been experiencing anxiety then depression as my levodopa wears off. Sometimes this is much more disconcerting than the physical symptoms. Occasionally I don't seem to recover the rest of the day.
I have tried the spray 1 hour before the next dose of levodopa is due and though it's subtle it seems to smooth out my declining mood. Anxiety doesn't increase and depressive feelings likewise seem lessened. Maybe it's all in my head... it is all in my head.. but there doesn't appear to be any side effects and it is not expensive.