Preliminary clinical studies with L-prolyl-L-leucyl-glycine amide in Parkinson's disease

The present study, carried out in 16 parkinsonian patients, indicates that L-prolyl-L-leucyl-glycine amide possesses some antiparkinsonian activity and that, if used with levodopa, it can reduce some of the drug-induced dyskinesias. These preliminary observations should be submitted to a controlled trial in a large number of patients before therapeutic applications are claimed.