Who is behind the "war on drugs"
The difficulty in arranging trials with illegal recreational drugs, as well as their unavailability for genuine therapeutic use is really just collateral damage from the so-called "war on drugs". It's not a war on all the latest, often quite dangerous legal "designer" pharmaceuticals.
Any health professional will tell you that drug abuse is a health problem and shouldn't be treated as a criminal matter, but allied against the voices of reason are - big pharma, companies that sell alcoholic beverages, the tobacco industry, for profit prisons, law enforcement agencies and every conservative politician that would press voters' buttons to get elected. They all depend on there being a drug problem. Geez! Not much chance of the drug problem going away soon!