"i&#039;m 30 and have taken several types of add medications since i was young.  i stopped taking adderall/ritalin when i graduated from college (about 25 yrs old) because i did not like the side effect, particularly loss of appetite and jitteriness.  i have since had to get back on meds because i have a sales job and i was making mistakes at work.  i started on 25 mg a couple months back and it worked great at first, but has tapered off some.  i wasn&#039;t sure if it was still working, but at night when the morning pill wares off and i can&#039;t get anything done and i&#039;m super scatterbrained.  that tells me it is working.  i should probably take the doctor recommend evening dose, as well.  only complaint on side effects would be extreme sleep spells."