ritalin bends to dopamine reuptake proteines 78%, while cocaine bends sin signifficantly less amount. Sorry i cant track the quote, but I remember itvery clearly.
Same could be said about Dexamph, being more powerfull than mixed amph salts.
keep your treatment under control, for your safety, and the safety of your loved ones.
Live a happy and productive life, best regards, Trime.