They're physically safe unless taken in hugh doses an have many side effects like mental and emotional problems which can occur at any dosage level but of cours

They're physically safe unless taken in hugh doses an have many side effects like mental and emotional problems which can occur at any dosage level but of course get worse with increasing dose. Having used amphetamines I can attest they have positive and negative properties and we should be aware of both. There is also physical tolerance and they are addictive. They need to be well regulated and controlled. Read "A history of Speed" - it's a very interesting pharmaceutical story.