Ecstasy was perscibed to married couples who were haveing problems with their marriage . Speed given to soldiers in the world wars . Cocaine in bottles of coke , heroin for colds etc . Cannabis smoked by pregnant women for morning sickness. Before prohibition of drugs they were all regularly used in medicines .

I've been hearing about low dosages of LSD for depression in the news lately.

I seem to recall reading somewhere that LSD is very effective in treating alcoholism,

Imagine the guy asking his doctor for a prescription of LSD because he has an alcohol problem haha. I definitely know people that could use that second kind of drug you are talking about!