No negative effects from Amphetamine.

I have recently been experimenting with low doses of Amphetamine sulphate. I usually dose 30mg orally via gel cap. I have noticed that not only do I not seem to have any negative side effects but the effects seem to last much longer than I thought they would, a good 6 hours of energy and general good mood if dosed orally or 4 hours nasally. I can even get to sleep afterwards without problems and find myself more alert the following mornings. I don't find it too fiendish either so, is amphetamine the perfect drug? Or am I missing something here?

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P.s. I love you all.