Is it possible to get a hallucination two days after taking adderal?

Possible; unlikely: If you're having hallucinations, see your doctor immediately! at typical doses, Adderall (dextroamphetamine and racemic amphetamine) is quite unlikely to cause hallucinations ever, let alone two days after starting it. However, some people are vulnerable to hallucinations, and Adderall (dextroamphetamine and racemic amphetamine) might uncover that vulnerability it rare instances. It's a major symptom. I suggest stopping the Adderall (dextroamphetamine and racemic amphetamine) until you've checked in with your doctor.