metadate=Ritalin, goes to brain cells and stops them from taking up dopamine and norepinephrine, which are chemicals associated with focus, motivation and pleasure. That increases the amount of them in the general space between cells (no uptake so its constantly in ur synapses)
Adderall does the exact same thing. It also however goes inside cells and make them pump out dopamine. this may explain its slightly higher strength. But it may make it cause the build up of free radicals=sick feeling.
Both are almost the same(basically amphetamines besides a couple functional groups) , both will pep u up give u focus. both may also give u dizziness, nausea, heartburn/fluttering. LIke all drug after they run their course ur body fights back, bc ur levels were so high be4 (dopamine) your body counteracts by shutting off its synapses (area for dop release) so now u experience a lower level of dopamine then normal functioning life, which accounts for you down feeling/drowsy. be safe i know kids who cant do any work w/o these now bc of the abuse, they can be highly addictive