More than two million people in the UK now buy their drugs online, research published by the Royal Pharmaceutical Society (RPSGB) suggests.
Up to a third of these medicines may be fake and could seriously damage people's health, it warns.
The society has launched a new logo for online chemists so shoppers know which businesses are reputable.
But many people want to purchase pills without prescription, and are likely to continue to visit unregulated sites.
10 January 2008