Is it safe to take Adderall (dextroamphetamine and racemic amphetamine) and workout whilst using nitric oxide supplements?

No. I wouldn't think it's safe to take Adderall (dextroamphetamine and racemic amphetamine) during workouts. Adderall (dextroamphetamine and racemic amphetamine) is an amphetamine which can function like adrenalin. Your blood pressure and heart rate could go up too high. Probably even dangerously high, depending on the dose, potentially causing a stroke or heart attack. Why risk it?
No evidence. I do not know that there is any evidence of the interaction. I also have no idea why nitrous oxide is used as a supplement for anything! it is too dangerous and I do not think has any" workout proven benefits!
Adderall (dextroamphetamine and racemic amphetamine) L-arginine and other Amino Acids used to enhance Nitric Oxide levels are safe, in general, with amphetamines. However, intense workouts with stimulants may affect blood pressure and heart rate. Use with caution.