I have heard that drinking coffee reduces your chances of getting PD but after you are diagnosed it does not help. That said I don't think it hurts to drink coffee.

It brings on anxiety which effects my parkinsons

Well, looks like the responses so far are inconsistent both in the advice folks have received and in the effects.

i have found that if i limit my morning consumption to 2 cups i am fine any more than that and my tremors are worse! best to experiment and see what works for you...

I just read that drinking coffee may improve your motor symptoms but not day time sleepiness. So go ahead and have your coffee and see what happens.