there is which either caused me to be severely drowsy , withdrawn, and could not focus on my work ,until about 6 months ago I was put on Adderall which changed my whole life around , I was no longer depressed and I have been more focused then ever. I was put on 30mg per day and have noticed recently that the affects are not as strong as to when I first started taking it. My question is , is my body immune to the 30mg dosage ? And if so should the dosage be increased?