With a trend towards legalizing marijuana it is possible that currently illicit drugs may be more widespread in the future. In this class Rabbi Yuter examines Jewish perspectives, attitudes, and primary sources regarding substance abuse.
Amusing article from Reuters: Israel to Soothe Trauma with Marijuana – specifically for soldiers under stress. For a more serious take on drugs in Judaism, read this article by David Novak. As I recall, he demonstrates that most of the arguments in the teshuvot which prohibit taking drugs could equally be applied to smoking and drinking – neither one of which are as explicit prohibited.