Heroin is an opioid drug that is synthesized from morphine and usually appears as a white or brown powder or as a black sticky substance, known as “black tar heroin.”
Heroin can be injected, inhaled by snorting or sniffing, or smoked. All three routes of administration deliver the drug to the brain very rapidly, which contributes to its health risks and to its high risk for addiction, which is a chronic relapsing disease caused by changes in the brain and characterized by uncontrollable drug-seeking no matter the consequences.
Heroin abuse is associated with a number of serious health conditions, including fatal overdose, spontaneous abortion, and infectious diseases like hepatitis and HIV. Chronic users may develop collapsed veins, infection of the heart lining and valves, abscesses, constipation and gastrointestinal cramping, and liver or kidney disease. Pulmonary complications, including various types of pneumonia, may result from the poor health of the user as well as from heroin’s effects on breathing.
People who inject drugs are at high risk of contracting HIV and hepatitis C (HCV). This is because these diseases are transmitted through contact with blood or other bodily fluids, which can occur when sharing needles or other injection drug use equipment. (HCV is the most common blood-borne infection in the Unites States.) HIV (and less often HCV) can also be contracted during unprotected sex, which drug use makes more likely.
Because of the strong link between substance abuse and the spread of infectious disease, substance abuse treatment can be an effective way to prevent the latter. People in treatment, which often includes risk reduction counseling, stop or reduce their drug use and related risk behaviors, including risky injection practices and unsafe sex.
National Institute on Drug Abuse. February 2016. View Source.