I was put on 200 mg provigil today and taken off adderal 30mg 2x/day. What are the possible side effects of switching and is the dosage similar?

Noticeable change. The intention behind the change is important to know and so i can only surmise what it was although both good and bad things may happen as with most changes. The Provigil is more subtle in both therapeutic effects and side effects. The Provigil may cause less jitteriness and anxiety and will not have appetite suppression. Monitor for a strange rash or malaise from rare allergic reaction.
Adderall (dextroamphetamine and racemic amphetamine) vs Provigil. The doses are not equivalent but it is an appropriate starting dose. See how you do. Some people may require 400 /d. Best wishes.