PCP was first used recreationally in the 1960s and gained a reputation as a drug that could cause bad reactions and was not worth the risk.
The illicit diversion use of prescription drugs has increased dramatically since the 1990s and has been accompanied by increased emergency room visits, accidental poisonings, and drug rehab admissions for addiction.
Street heroin may contain additives that won't dissolve, which can result in clogged blood vessels which lead to the lungs, liver, kidneys, or brain. This can cause infection or even death of small patches of cells in vital organs.
Vicodin withdrawal can occur when someone has been prescribed the drug or when someone is abusing the drug has developed a tolerance and dependence to it.