Mouse anti-Human GFAP monoclonal antibody for IA. Dextropropoxyphene, manufactured by Eli Lilly and Company, is an analgesic in the opioid category. It is intended to treat mild pain and has, in addition, anti-tussive and local anesthetic effects. It has been taken off the market in Europe and the US due to concerns of fatal overdoses and arrhythmias. An estimated 10 million patients have used these products.