Why Drugs Can Be So Expensive Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Deby Provost has one question: If her drug for multiple sclerosis has been around for 20 years, why does it cost so much? It's a question that Congress is asking, too. ( nvinacco / flickr ) Produced by Mary Harris Produced by PRI and WNYC