@alfredoolivas Thanks for your reply.
Are you suggesting that there are no popular medications that don't increase DA and NA?
I kind of was, yes. The case of bupropion e.g. is not truly dopaminergic in practice.
Caffeine is a good point yes but it's also somewhat contradictory and double-edged.
Bromocriptine, amantadine and memantine, cabergolin I have no experience with and they're all kept restricted in their prescription labeling unless one already has full-blown PD. Other ergot derivatives like metergolin or lisurid or ergotiamin have been bought up and globally phased out.
In this light the potential properties of OTC OLE appear alluring.