I was prescribed adderall for adhd, The pharmacist gave me the generic amphetamine salts 10mg. I was doing good with it until my dose was raised to the 20mg. tablets which are totally different, like night and day, the 20mg. amphetamine salts are doing me like the menthalphenidate such as blurring my vision and giving me an ick feeling. I've been feeling very depressed since on them. I have a few extra of the 10mg. tablets which I took this morning and I am know doing much better then when I tood the 20mg. tablets. My question is why are the 20mg.tablets so different then the 10mg.tablets?