First up to 25% of PD diagnoses are wrong. So check symptoms carefully and don't go on dopamine enhancing drugs (DED) till you are sure it's PD. DEDs include dopamine agonists, l-dopa and MOA inhibitors. Dopamine is possibly neurotoxic at therapeutic doses and isprobably addictive if you don''t have PD.

There is evidence (Schultz et al 2002) that coenzyme Q10 may slow progression of PD at high doses, equivalent to 1200-400 mg of ubiquinone - but I take a roughly equivalent form , 400 mg ubiquinol daily, which I get from LEF

If your Dad is not on DEDs already, check out www.pdrecovery.org  for a free book on a low risk method (a special Chinese massage) that may help a lot. I'm using it and feeling better, however it's slow to work and involves some visualisation and attitude changes, so you need determination. The first chapters give an overview, so you can read a bit onscreen, before printing the whole 385 pages!.

If he is already on DEDs, he can't easily or safely get off them, read the second book from the same site, "Once upon a pill", which has helpful advice on managing the drugs to minimise side-effects.

Lastly,don't despair. I think that the medical ideas (progressive neurodegenerative disease due to brain cell death) about the causes of PD are not the last word. Not all the symptoms of PD can be explained by dopamine deficiency and not all are cured by DEDs. This shows that dopamine deficiency is probably not the root cause of PD. Also, there is evidence from placebo experiments that even advanced PDers who cannot move without the drugs, can move, and appear to release their own dopamine when they THINK that they've had the drug.

Cheers
Wizard of Oz