A quick check on the defination of prescription drugs in Wikipedia educated me on exactly what it is. Now what happens when you abuse it, the statistics in America shows a rapid rise in drugs dispensed which is rather shocking. Check out the below infographic for more information.
"A prescription medication is a licensed medicine that is regulated by legislation to require a medical prescription before it can be obtained. The term is used to distinguish it from over-the-counter drugs which can be obtained without a prescription. Different jurisdictions have different definitions of what constitutes a prescription drug."