adhd
"Been on and off Ritalin for yrs.  The reg. version works well for me, but its effect was gone in under 3 hrs.  The extended release was useless - I metabolize it too quickly and was ODing on it after about an hr.   When I was working, it was great not wasting time getting distracted by crap: no retracing my steps to remember what I was looking for; no wondering why I had the telephone in my hand - was I calling or answering, etc?  But I didn't like driving under Ritalin - I was used to having my attention all over the place and being able to see EVERYTHING that was going on around me:  traffic slowing 5 blocks up; a wingnut weaving thru lanes 2 blocks behind.  I only took it while working or when I needed to focus.  Same thing now."