CARISOPRODOL; ASPIRIN; CODEINE treats muscle pain and stiffness. It is prescribed when other pain medications have not worked or cannot be tolerated. It works by calming overactive nerves in your body, which helps your muscles relax. It also decreases pain and inflammation. It is a combination of a muscle relaxant, an NSAID, and an opioid. Get Carisoprodol/Aspirin/Codeine for as low as $21.93, which is 87% off the average retail price of $163.95 for the most common version, by using a GoodRx coupon.