[Reflections on the biosynthesis of morphine and idiopathic Parkinson's disease].

Based on a day-by-day, in-depth study of a clinical case, it was deduced that Parkinson's disease results in autointoxication, due to damage to morphine biosynthesis. Blood morphine levels should be studied in patients suffering from Parkinson's disease before treatment as well as in depressive patients (being the group most affected by Parkinson s disease) to achieve early preclinical diagnosis.