Yes, I saw that too. But amphetamines have some nasty side effects.

Methamphetamine was the standard military "go pill" for decades. Then dextroamphetamine. Now there's interest in modafinil, which has milder side effects.[0,1]

[0] http://www.ncbi.nlm.nih.gov/pubmed/22764609

[1] http://goflightmedicine.com/stimulants-sleep-aids/