indeed...
and amphetamines, (or simillar) have been used as diet drugs for years, (before they became illegal), as they increas metabolism, and reduce hunger...
there are many legitimate, or at least semi legitimate uses for most drugs, be they, medical, military or religious...
Mamikoura makes a good point about piolets being given drugs...
which leads to the question, does taking drugs only become wrong when it's done in a social context, rather than for a real reason?