Taking a clue from a deadly poison found in the skin of a South American forg, researchers have discovered painkiller that seems to have all of the benefits of morphine, but none of the damaging side effects. Researchers at Abbott Laboratories in North Chicago, developed the new pain killer called ABT-594, after scientists at the National Institutes of Health isolated a poison from the skin of a species of Ecuadorean frog, Epibpedobates tricolor.