He finds the effects of morphine on his patients instantaneous and three times more potent. The British arrive in lower Burma, importing large quantities of opium from India and selling it through a government-controlled opium monopoly. The British and French renew their hostilities against China in the Second Opium War. In the aftermath of the struggle, China is forced to pay another indemnity. The importation of opium is legalized.
Opium production increases along the highlands of Southeast Asia.
C.R. Wright first synthesizes heroin, or diacetylmorphine, by boiling morphine over a stove. In San Francisco, smoking opium in the city limits is banned and is confined to neighboring Chinatowns and their opium dens. Britain passes the Opium Act with hopes of reducing opium consumption. Under the new regulation, the selling of opium is restricted to registered Chinese opium smokers and Indian opium eaters while the Burmese are strictly prohibited from smoking opium. The British acquire Burma's northeast region, the Shan state.