I have been having trouble concetrating and staying focused at work.  I was prescribed to adderall for ADHD in my high school / college years , but stopped using when I finished with school.  I am wondering if that was a mistake and maybe I should of kept up on the medicine.
Degree understand your concerns went through your details. I can understand, and I request not to underestimate the real benefits of ad Chat Doctor.  You needed that medicine at that time, and you were prescribed. That is past. Usually ADHD corrects itself. Your problem could have corrected itself. Ask yourself. Is the low concentration in your work due to lack of interest in work, procrastination, lack of motivation, lack of passion in job ? If your work is of mechanical nature or stereo typed, it is obvious that you loose interest and concentration in your job. In that case, your problem is not related to ADHD. You need to learn to cultivate passion and love towards your job. Please let me know if your problem really is related to ADHD. In that case, CBT should work well for you. If you require more of my help in this aspect, please use this URL. http