Even if you switch to something "heavy" like amphetamine or methamphetamine, provided you never, ever, ever go above clinically approved dosages... the side effects and dangers are extremely minimal. There's a reason adderall and dexedrine are so commonly prescribed long-term for treatment of ADHD.If you don't become an addict, there really is almost no risk. Still... that's one fucking HUGE "if," right there.