Lack of confidence and concentration.

Dear Sir/Madam Could you please advise about the mentioned Symptoms if they are known with these medicines. we don't remember such issues before this treatment was started. it is more than 3 years now and last three EGG report is also OK as per Doctor. Lack of concentration and confidence is appear on daily routine activities and in school classes also. we are trying to help our child for these issues most of the time including school teachers as well but seems his mind is not ready to concentrate anything. he is not able to keep most of the thing in mind. please advise if these medicines can be stopped now after taking a long treatment of more than 3 years and with respect to last 4 good EGG report.