Does any one now the after affects of the purple heart taken in 1950 to 68 they were to keep you awake?

lhave tryed the history and it has come up as anphetamines but not telling me what the after affects were and that is what i am trying to find out, they were purple and in the shape of a heart,

Does any one now the after affects of the purple heart taken in 1950 to 68 they were to keep you awake?
they were amphetamines that increased your heart rate and helped you stay awake, like a huge big shot of caffeine but stronger.











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