It's been 2 years i'm on concerta. it has been ineffective for a while. it only works for 2 hours in morning. then i get sleepy and i nap and sluggish?

Talk to your doctor : You should see your doctor for a discussion about your treatment options. There are other choices of medication available.

May need dose increa: Stimulant medications like Concerta can cause a tolerance, requiring a dose adjustment to regain the desired effect and duration. Speak to your prescriber. As to the tiredness when the effect wears off,make sure to get at least 8-9 hours of sleep and eat a breakfast which has a good amount of protein