This is a drugA name for a wide variety of chemical substances capable of altering the function of your mind and body in significant ways. These can include over the counter prescriptions, alcohol, and controlled substances. Most drugs are either physically and/or psychologically habit-forming. More capable of triggering the receptors in the brain, leading to an opioidCompounds acting on opioid receptors in the body, whether naturally occurring or synthetic. Their use can lead to the development of crippling physical dependence. Whether used through a prescription for pain management or recreationally, its overuse in the United States has been classified as a nat... More effect. HeroinAn opioid used as a recreational drug that is often injected. It has a euphoric effect on the user and is highly addictive both psychologically and physically. It is known for being one of the primary drugs involved in opioid overdoses and for its particularly nasty withdrawal symptoms. More, morphineMorphine is a prescribed drug that is often abused and can be habit-forming. It is used recreationally, often by snorting. Morphine addiction can also form when used as prescribed. More, and opium are prime examples of this category of drugs. There are forms of therapy focusing on this opioid response and designed to wean an individual of dependence.