The first the links/references contain virtually the same information. The last one has Parkinson's specific drugs listed. If you take any of these, you might want to consult a pharmacist to see how long the drug remains in your body.
So sorry you are having to put up with the stress in your work life. Good luck!
Medications & Substances Causing False Positives
http://www.passyourdrugtest.com/false-positives.htm
AskDocWeb.com...False Positives
http://www.askdocweb.com/falsepositives.html
Wikipedia...False Positive
http://en.wikipedia.org/wiki/Drug_te...alse_Positives
http://www.doctorspiller.com/local__anesthesia_7.htm
Scroll half way down this web page for the chart that contains these:
Potential agents causing false-positive result
Amantadine / Symmetrel--Treats Asian flu (Anti-viral) and Parkinson's
Deprenyl / Carbex, Eldepryl--Treats Parkinson's
Selegiline / Eldepryl--MAO inhibitor used to treat Parkinson's