Accutane

I am on my fourth month of accutane and feel so extremely tired all the time. Like not just mentally, but my whole body aches- especially early in the morning and late at night. I work full time and go to school full time and I am looking for some options (other than more sleep and to cut back on my productivity) to help me regain energy throughout my days. Coffee is nice until it wears off about an hour later. I also am not a fan of energy drinks. Any suggestions?