What is the difference in dextroamp-amphetamine 30mg and amphetamine salts 30mg. been taking the dextroamphetamine but this prescription from pharmacy is the amphetamine salts. the salts make me so nauseous?

There are essentially the same form of the drug, likely from a different maker that brands the wording differently. Sometime a change in the maker can produce some difference in effect, but all are required to be at 95% the same basic drug.

Generic drugs differ from brand to brand secondary to varying manufacture. These side effects can vary. Please let your doctor know what has occurred as an appeal may be useful