In terms of neurotoxicity this is the order I'd generally give you
No neurotoxicity in therapeutic doses BUT possible Neurotoxicity in high doses
Methylphenidate (Concerta, Ritalin, etc.)
Dexmethylphenidate (Focalin)
Lisdexamfetamine (Vyvanse)
Dextroamphetamine (Dexedrine, Dextrostat, approx 3/4 of Adderall)
Levoamphetamine (approx 1/4 of Adderall)
Atomoxetine (Strattera)
HOWEVER, because Dextromethamphetamine is prescribed as an ADHD med, I can tell you it has neurotoxic effects at virtually any dose
Dextromethamphetamine (Desoxyn)
Keep in mind, just because something has neurotoxicity, (dextromethamphetamine), I doubt 5mg a day over the course of several years would have substantial negative effects on someone...
EDIT: As far as the body goes (excluding brain)... I'd say all ADHD meds in therapeutic doses (excluding desoxyn), are pretty much safe, only physical effects are the side effects