Hi, I'm not a parkie and don't suffer from anxiety, but I do take LDN (low dose Naltrexone) for my Multiple Sclerosis.

I didn't read every word, but gleaned this from the article: "Mixed effects regression results revealed that across time, the naltrexone group tolerated significantly less time in the room with the feared animal (Behavioral Avoidance Index) as compared to the placebo and no drug groups. Phobic individuals assigned to the naltrexone group had significantly higher fear ratings across time in comparison to the placebo group."

It appears that LDN isn't much good for abating fears.

Thanks for posting the article, Ibken.