Is adderal xr 30 mg a high dose?

It could be: Usually no more than 20mg/day is needed , often less but 60mg/day is considered the maximum dosage. Each person is different and the dosage should be determined by the physician treating the patient.

Not necessarily: As a starting dose that is definetely a high dose, but if you have been on it for while it is a moderate dose. Tolerance may occur which means that after a while the same dose is no longer effective. Doses more than 40-60 mg are unlikely to have increased benefit and something else should be considered. Talk to prescribing coctor.