From experience, I know how hard it is to find the medication and dosage that works for you and your lifestyle. Have you discussed this problem with your doctor? I was diagnosed at 50 and I am now almost 73. Ritalin made me feel a bit nuts - shaky as in too much coffee! I used dexedrine for a while and when I switched doctors he would not prescribe that for me so he put me on Vyvanse. I took a large dose but I knew it wasnt as effective as dexedrine - so I hit medicare and Kaiser Perm. which says oh, Vyvanse is too expensive - I agreed and they put me back on dexedrine. I am a happy camper these days. So my suggestion to you is to keep plugging away - if your doctor isnt helpful, find another one. ADHD is particular to each individual who has it and without trial and error, you cant find your magic bullet - but stay at it - your persistence could give you results that might last the rest of your life - Good luck to you!