I have ADD, so i have a precription for ritalin. I take it now and then, usually only for tests. A friend of imine has asked me for some. The slow release is 20 mg, while the not to low release, but kinda stronger, is 10 mg. If i am to give him, how much should i give him? I take one of each twice a day 4 hours. I know the depressive side-effects on myself, but should i worry if i give my friend some? With having ADD, would it be bad, if i took some to get a buzz?