Amphetamines effects on senile people

[primal440]

OK, this question may sound sick to some people but let me say this is just purely imagination, I would never consider administering a drug to people unaware of, especially elderly people; not to mention ive never and will never get ahold of something as vile as amphetamine but anyways, from a purely "scientific" point of view: What would amphetamines, any kind, do on a person above 70 years and/or with severe personality/psychological/physical problems derived from their age? Like paralysis, Parkinsonian symtpoms and typical senile faigue and general delirium? Would dosing them would temporarily bring back lucidity or instantly destroy their fragile bodies or maybe do nothing at all? What about the dopamine and adrenalin deposits within them and their reaction to these potent foreign inhibitors?

Has there ever been anyone "Mengelian" enough to perform such a test?
I know some people over here can get ahold of some rare texts and info thats why i ask.