I just wanted to say that this short review I am writing is ment as a suppliment to some of the other information others have provided and I'm not openly condoning the use of any perscription medication without your overpaid perscription scribe's half witted advice. ( Yes i know some doctors really do care, believe me it touches my heart.) I've been prescribed amphetamines for the past 6 years. First Methylphenidate then Adderall segmented by a short trial of Adderall XR then back on Adderall then Dexedrine. Now the run down on Methylphenidate, short acting decent euphoria but much more mental ( I don't want to move, I rather just draw a picture of Beethoven on this napkin for 4 hours.) Adderall (dl-amphetamine close to " Benzedrine " just with difrent isomer polarity) was wonderful when I first began to take it, the euphoria was wonderful. I felt just this feeling of joy each and every time I would get a writing or math assignment for classes ( the thought of transfering any writing medium onto paper put me in a state of complete well being). I could do anything from playing video game to drawing yet most physical activity never seemed to be rewarding. Small mundane repetitive things all ways brought me great joy while spun. Some how the Adderall stopped working as well and just taking a 30 mg tablet would weild all of the negative side effects with virtualy none of the positive require me to take at least 4 mg of xanax to sleep. Thats obviously something with my personal neuro chemistry. There was nothing I hated more then waking up with my teeth killing and huge bites in the sides of my cheek. So taking advice from many great men such as Jack Kerouac and folk rock group dexies midnight runners, I queried my doctor about Dexedrine. I was previously prescribed 60 mg of Adderall and now I'm prescribed 2x15mg Dexedrine spancules. I can't help but rave about the smoothness. Sure maybe the duration isn't very long and it doesn't give much euphoria but virtually no comedown and still very pleasurable while on them. Also it is probibly the most effective for doing a combination of physical and mental labor.My only problem is my dose doesnt seem to be high enough for my daily activities.( Most likely related to my long haul with adderall.) conclusion ranking based on Euphoria(recreational value), Side Effects(muscle tension, headaches), longevity, Comedown (also including after effects) methylphenidate - 7, 8, 4hr, 9 dl-amphetamine - 9, 9, 5hr*, 10 d-amphetamine - 8**, 4, 4hr, 3 * The longevity of dl-amphetamine is completely inconstant, I often feel wonderful for the first two hours then lethargic yet mentally tweaked for the remaining three hours till the most terrible comedown next to ecstasy or a meth-lsd combo sets in that often lasts well into the following afternoon. ** The euphoria with d-amphetamine isn't as acute as the dl-amphetamine salt mixture but personally I think its more enjoyable because of its relative smoothness. In closing, d-amphetamine is my preferred FDA approved psycho-stimulant. Watch out on all of these, you can really burn your receptors out. Tollerence isn't even that big of a problem for me its more of depleation. I left out Desoxyn considering I haven't had the chance to run a trial on that prescription. I know I left some other explanations out due to time restrictions. I apollogize if you think some of what I said is redundant. If you have any contradictions to my experences or other information, I think it would be helpfull to post them in this thread. None of this information reguards illegal use or abuse of controlled substances, any similarity is purely fictional.