Could be adderall (dextroamphetamine and racemic amphetamine) xr the cause of my random headaches?

Possibly: Stimulants such as Adderall (dextroamphetamine and racemic amphetamine) certainly can cause headaches, either when you take the pill or as the medicine is wearing off. Also, some experience headaches from not eating, which stimulants may cause. If they are truly random and not very frequent, Adderall (dextroamphetamine and racemic amphetamine) is less apt to be a cause.