...Unit 10: Substance-Related and Addictive Disorders DSM-5 recognizes Substance Related Disorders as resulting from the excessive use of 10 separate classes of drugs: Substance-use disorder: * Alcohol related disorder * Cannabis related disorder * Hallucinogen related disorder * Inhalant related disorder * Opioid related disorder * Sedative hypnotic - or Anxiolytic related disorder * Stimulant related disorder * Tobacco related disorder DSm-5 explains that activation of the brain’s reward system is central to problems arising from drug use- the rewarding feeling that people experience as a result of taking drugs may be so profound that they neglect other normal activities in favour of taking the drug The pharmacological mechanisms for each class of drug is different The activation of the reward system is similar across substances in producing feelings of pleasure or euphoria – “high” DSM-5 includes Gambling Disorder under the heading “Non-Substance-Related Disorders” * Gambling behavior activates reward system similar to those activated by substance abuse and produce behavioural symptoms that appear comparable to those produced by the Substance Use disorders DSM-5 recognises that people are not all automatically or equally vulnerable to developing Substance-Related Disorders Some people have lower levels of self-control, which may be brain based, which predispose them to developing problems if exposed to drugs ...
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