A NEW painkiller based on the venom of a sea snail will be available in Britain from today. Prialt, or ziconotide, is the result of more than 20 years’ research by a scientist born in the Philippines, Baldomera Olivera, who is a professor at the University of Utah. It is 1,000 times more potent than morphine but, unlike that drug, is not addictive. It is aimed at people suffering from severe, chronic pain who would normally require morphine. Given by injection into the fluid around the spine, it is the first non-opioid painkiller using this method of administration to be...