Hi, does anyone know what the dose of ritalin is compared to the dose of adderall (dextroamphetamine and racemic amphetamine)? i.e. is 20mg of methylphenidate equal to roughly 20mg of adderall (dextroamphetamine and racemic amphetamine)?

No: As i understand it, the rule of thumb for dosing-equivalence between Ritalin (methylphenidate) and amphetamine (d-amphetamine) is 1mg dexamphetamine = 2mg Ritalin (methylphenidate) (approximately). So the amphetamine is roughly twice as potent. However, Adderall is not pure amphetamine--it's a mix of amphetamine compounds--various versions of d-amphetamine bonded to other chemicals. They do this so mostly that the dose enters the bl.