Polysubstance abuse is the regular use of three or more drugs without showing a particular preference to a single one. Those who suffer from polysubstance abuse are usually more addicted to the feeling of the high itself, instead of just one particular drug. Common Drugs Abused Some of the drugs that are more common to be abused include heroin, methamphetamines, cocaine, marijuana, alcohol, prescription painkillers, and benzodiazepines. Any combination of three or more substances, except for caffeine and nicotine, is considered this type of abuse. Young adults and teenagers are more likely to poly drug abuse because it can be harder...