I want to thank agteach and dij for your quick responses to my post about concerta. One update.....I ask pharmacist to fax me an information sheet about concerta including possible side affects and she did. Some of the side effects are: loss of appetite, blrred vision, dizziess, ligjtheadedness, dru mouth, stomach upset, sleeplessness, irritability or constipation durring first few days as body adjusts to the medication. While many of these are the same as ritilin I feel the doctor erred in telling me there were NO side effects. Hope this is helpful to others who are having difficulty finding info about this drug.