I've been taking amlodipine because it was the best cc blocker I could obtain from Kaiser, thinking (hoping) it was similar enough to isradipine. Turns out apparently not. The other thing I did soon after diagnosis was to slap on a low-dose bio-identical estrogen patch, since I've read several times about an estrogen-PD connection. Just one example: women who get full hysterectomies (including ovaries) before age 50 have a higher risk of PD, and risk increases the younger the age at removal.