My spouse with PD & I also went to Genoa & spoke with Dr Fancellu. We live in the US, & are not able to order ampules by mail. While we were in Italy, vwe took Dr Fancellu's Rx to several Farmacias - they look at the Rx, hand you the B-1 & return the Rx to you, so you're free to get refill as often as needed. We stocked up, & also ordered online through Amazon Germany to send ampules to cousin in London. The US has rules that aren't helpful to patients, so we do what we need to do.
All legal, as it's not illegal to possess injectable B-1, but it is to order it by mail.
Excess Vit. B
Vitamin B makes dyskinesia worse?
Natural high potency MAO-B inhibitors 
B Vitamins and the Brain: Mechanisms, Dose and Efficacy
MAO-B inhibitors, natural sources, how they effect GABA, and neuroprotective potential 
