It has been a month already and now the begining of August.. i have already tapered off of the Amphetamine salts and quit taking sleeping pills.. The doctor said that the amphetamines are out of my system.. but my body still has this slight numb-like feeling ... what is this? although b12 injections help me with this feeling kind of speeding me up like the amphetamines did and it makes it better on me. plus xanax he gave me for panic attacks. Could it be that my body still needs the amphetamines and sleeping pills? since b12 speeds me up like amphetamines did and xanax slows me down like the sleeping pills? My body is not functioning right and something is wrong.. but it is hard to find help when your doctor is a children's doctor..