As per pshyological evaluation doctor diagnosed ADD. Methylphenidate taking 4 months up to  40 mg. No improvement. So doctor changed medicine. Then modalert 100 mg too much head ache drowsiness, feel tired, sleepy always, but effective short term memory and attention improved its really good one when i read any article listen news. Taken only  for 3 days. So doctor changed to waklert Doctor prescribed me WAKLERT 75mg 10 days works good but felt memory issues. Better focus and concentration feel energetic but when i read it does not able to memory. So i have to read it again and again. Understanding and learning skills are not better than modalert. What shall i do, will waklert help me or ask doctor to change any medication.