Chapter 31: Substance-Related Disorders & Addiction

Substance-Related Disorders & Addiction explores the neurobiological foundations of addiction, highlighting how mind-altering substances hijack the brain's reward system by flooding the nucleus accumbens with dopamine, leading to permanent neuronal adaptations. This physiological shift is often illustrated by the concept of permanent brain change, emphasizing a lifelong vulnerability to relapse once the brain's chemistry has been fundamentally altered. Nurses play a critical role in early identification, utilizing both subjective interviews and objective assessment tools, such as the CAGE questionnaire and toxicology screens, to overcome the primary defense mechanism of denial and the common tendency of patients to underreport usage. The text details the DSM-5 diagnostic criteria, which classify these disorders along a spectrum of severity based on factors like tolerance, withdrawal, and the continued use of substances despite significant interference with major life obligations. A cornerstone of effective intervention is the Transtheoretical Model, or Stages of Change, which assists clinicians in identifying a patient’s readiness for change across stages ranging from precontemplation to maintenance. The chapter systematically breaks down major substance classes, beginning with central nervous system depressants like alcohol, which poses a massive societal and health burden through complications like Wernicke-Korsakoff syndrome and life-threatening withdrawal symptoms such as delirium tremens. It also discusses the rise of opioid misuse, the life-saving application of the antagonist naloxone, and the use of replacement therapies like methadone and buprenorphine. Stimulants, including cocaine and methamphetamine, are analyzed for their intense impact on neurotransmitter reuptake and the severe psychological crashes that follow their use. Furthermore, the summary covers hallucinogens like marijuana and LSD, as well as the risks of inhalants common among younger populations. Nursing management focuses on a multifaceted psychotherapeutic approach, emphasizing milieu safety, consistent limit setting, and the establishment of a trusting, empathetic relationship that utilizes skillful, non-crushing confrontation. Pharmacological supports such as naltrexone, acamprosate, and the aversive agent disulfiram are examined as tools to assist in maintaining long-term sobriety. Finally, the chapter addresses the unique challenges faced by addicted healthcare professionals and the efficacy of peer-support models like Alcoholics Anonymous and Narcotics Anonymous in fostering personal responsibility and sustained recovery.