It is made of acetaminophen Tylenol and hydrocodone, which is a synthetic version of codeine. Vicodin abuse is all too common among users and is one of the most common subjects of prescription drug abuse. No one sets out to deliberately become a Vicodin addict. They may get a prescription for this medication following surgery, an injury, or for chronic pain. If the person is not getting the level of pain relief they are expecting to get from the medication, they may start using it more often than directed by their doctor.