Learn more about Substance misuse here
Dependence on drugs is a cluster of physiological, behavioural, and cognitive phenomena in which the use of a substance takes on a much higher priority for a given individual than other behaviours that once had a greater value (WHO 2007). Drugs of abuse include cannabis, opioids (opiates), CNS stimulants (cocaine, crack, amphetamines, ecstasy, crack), CNS depressants (barbiturates, benzodiazepines, alcohol), hallucinogens (LSD, psilocybin), and volatile substances (glues, gases, aerosols) (DTB 1997).
Opioid misuse and dependence are associated with a wide range of problems, such as overdose; infection with HIV, hepatitis B or hepatitis C; thrombosis; anaemia; poor nutrition; dental disease; criminal behaviour; relationship breakdown; lost productivity; unemployment; imprisonment; social exclusion; and prostitution, as well as withdrawal symptoms (Prodigy 2006; Gowing 2006; National Treatment Agency for Substance Misuse 2006). Problems associated with excessive alcohol use include hypertension, accidental injury, hand tremors, duodenal ulcers, gastrointestinal bleeding, cognitive impairments, anxiety and depression (Saunders 1990). The development of alcohol dependence appears to involve changes in brain neurotransmission (Littleton 1994; Tsai 1995).
Treatment programmes to help people with drug and alcohol problems include a range of individualised psychosocial interventions such as counselling, self-help groups, and rehabilitation programmes, in addition to medication.