To my knowledge, no clinical trials testing antihistamine drugs in people with Parkinson's have yet been carried out.
The article you found on our website last year (http://bit.ly/PnDLAF
) suggests there may be some potential for antihistamines in Parkinson's, but I don't think there are any trials planned yet. Obviously if we do hear of any we'll highlight them on the website and in our magazines.
However, there is a growing body of research evidence to suggest that inflammation in the brain may play a key role in nerve cell death in Parkinson's - and that drugs that can reduce this inflammation could have protective effects.
We're funding research in this area to help us better understand the inflammatory processes that occur inside the brain in Parkinson's: http://bit.ly/18VASk4
And to develop potential treatments that combat inflammation: http://bit.ly/15IxdlP
I hope this helps to answer your questions.