Drug info - some questions about methamphetamine

[cobetcknncoio3]

ok, well SWIM is a heavy amphetamine user (dextroamphetamine in adderall, sometimes dexedrine), usually blowing 100mg in single sittings to satisfy his tolerance. how would this affect the experience if SWIM were to blow some meth (he never has tried it before)? SWIM assumed that just the fact that dexamphetamine is so much weaker than methamphetamine would render his current speed tolerance irrelevant in comparison to an amphetamine as powerful as meth, but correct him if he's wrong.