Hi is there a difference between the medications amphetamine dextroamphetamine and amphetamine salts combo? i felt different on each one. thank you

Subtle difference: Drugs & molecules occur in 2 different forms with the same composition called enantiomers & are physical mirror images: dextro (right), levo (left). Racemic is a mixture of both. Biologic systems use d versions almost exclusively and d-amphetamine is generally more active than l-amphetamine. Amphetamine is racemic amphetamine with d:l ratio of 1:1. The "salts" work out to be a 3:1 ratio of d:l