I don't think the person who posted the original message about recreational drugs and PD (sorry, I can't retrieve the message) intended to say or even implied that ALL, MANY, or MOST of the middle-aged people w/PD abused recreational drugs in the 1960s--just that we ought to look at this as a POSSIBLE causative factor, just as we look at diet, pesticides, environmental "toxins," etc. Don did not use cocaine, pot, heroin, LSD, or any other illegal drugs. He has PD. Some of our friends or acquaintances did use some (or all) of the above. None of them has PD. This anecdotal evidence from our limited sample should not be taken as any indication that such use doesn't cause PD. Science demands that we study any and all possibilities, not put some things off limits because they offend our sensibilities. Joanne Sandstrom [log in to unmask]