Is it normal to have to endure teeth clenching/grinding while on adderall (dextroamphetamine and racemic amphetamine)?

No, it's not: Adderall (dextroamphetamine and racemic amphetamine) is a stimulant medication used to treat adhd, one of side effects is increase in anxiety especially if one already has it. Teeth clenching is not a direct side effect of Adderall (dextroamphetamine and racemic amphetamine) but may be due to associated worsening of anxiety.

Nightguard: Many people experience this problem. A custom nightguard can be fabricated by your dentist to protect your teeth & prevent damage & pain.