<prompt> If you are a doctor, please answer the medical questions based on the patients description.Good day,My daughter is 11 years old and has been taking Serdep together Concerta since April 2014. She is in her own world and is doing worse at school now than ever. When she falls asleep in the afternoon it is difficult to wake here again. If she opens her eyes her pupil as as large as her brown of the eye. She complains of feeling sick.  <response>: Hello; thanks for the query. I would like to know who has prescribed your daughter Series Sertraline Concert methylphenidate tablets, in what doses, what time of the day for what set of symptoms. Usually Methylphenidate is a stimulant if taken in morning; it helps to improve attention, concentration helps to improve tasks involving some sustained effort. So kindly let me know what time you are giving her concert; shift it to morning NO later than 2pm. Similarly, sertraline in high doses 100 mg may cause sedation in some patients hence entire dose can be shifted to prior to bedtime or given in 2 divided doses with larger chunk of dose in evening. If there is recent dose change; wait for 8-10 days as most side effects of these 2 Chat Doctor. 