Capsaicin is a chemical found in chili peppers, and researchers at a south San Francisco company called Anesiva, have been testing a new drug called Adlea on patients recovering from knee and hip surgery.
Basically, what they are doing is dribbling the purified pepper liquid onto the nerves that transmit pain. "You don't feel pain because those sensors are degraded and it takes eight to twelve weeks for them to grow back, just like if you eat enough chili peppers your mouth will go numb after a while" says, James Mclaughlin an Anesiva researcher.
Unlike aspirin or morphine, the relief comes without nausea or stomach pains. Of course, eating the chemical that makes food fiery is not going to have the same pain benefits as injecting it, so don't try this at home. Just know that if you're a fan of the spicy stuff, it could be on its way into your medicine cabinet.