Some questions about adderall (dextroamphetamine and racemic amphetamine)? can i use it if prior history of abuse or heart palpitations?

No: I would not give it to you. I don't know what your diagnosis is. I will tell you that every medicine should have a risk to benefit ratio completed.

Probably: I would consult with you physician and potentially a cardiologist. The cardiologist would probably do a ekg and/or echocardiogram to decide if you have any structural or heart rhythm problems. If you don't, you probably can use Adderall (dextroamphetamine and racemic amphetamine) under a doctor's guidance. But i would ask the doctor about these issues before using.