Concerta makes me irritable and doesn't seem to be helping my adhd. It also makes me drowsy and foggy. Can I ask to try adderall (dextroamphetamine and racemic amphetamine)? Good alternative?

Yes. The treatment algorithm suggests switching from one stimulant class to another if there is poor or adverse effects. Adderall, vyvanse, (lisdexamfetamine) or Dexedrine are reasonable alternatives to discuss with your doctor. Remember using chocolate, caffeinated beverages or other medications can effect the usefulness of stimulant medication or augment its side effects.