Exhibition tells story of mind-altering drugs

A Victorian medicinal heroin hydrochlor jar, manufactured by Bayer Photograph: Wellcome Images A painting depicts two wealthy Chinese opium smokers Photograph: Wellcome Images A busy stacking room scene in an opium factory Photograph: Wellcome Images An advertisement for Hall's Coca Wine Photograph: Wellcome Images A Victorian medicinal Indian cannabis manufactured by Parke, Davis and Co of Detroit, US Photograph: Wellcome Images An opium den in San Francisco Photograph: Wellcome Images A poster printed during the prohibition era in the US between 1920 and 1933 Photograph: Wellcome Images A US poster shows a woman preaching for prohibition Photograph: Wellcome Images A poster tells how prohibition reduced organised crime Photograph: Wellcome Images A drawing shows the effects of opium Photograph: Wellcome Images An illustration of opium production Photograph: Wellcome Images An advertisement for an 'economical family size' bottle of Guinness Photograph: Wellcome Images Species of fungi, some hallucinogenic Photograph: Wellcome Images