Scientists who analyzed countless chemicals in spider venom say they have identified seven compounds that block a key step in the body's ability to pass pain signals to the brain.
In research they said could one day lead to a new class of potent painkillers, the scientists focused on 206 species of spider and searched for molecules in the venom that block nerve activity, particularly via so-called "Nav1.7 channels."
Experts estimate that as many as one in five people worldwide suffer from chronic pain, and existing pain treatments often fail to give sufficient or long-term relief.