While most people associate drug abuse with illicit substances such as cocaine or heroine, the most commonly abused substances in Los Angeles and across the nation are actually entirely legal. Prescription drug abuse is a growing problem that is leading more and more individuals to require the help of drug rehab to overcome an addiction. Despite being designed to treat specific medical conditions, prescription drugs still have a powerful potential for addiction, causing many individuals to misuse their prescription and in some cases even fatally overdosing. The following infographic takes a look at some of the most commonly abused medications in the United States.