Whats is Substance Use Disorder?
Substance use disorder (SUD)
SUD is complex a condition in which there is uncontrolled use of a substance despite harmful consequence. People with SUD have an intense focus on using a certain substance(s) such as alcohol, tobacco, or illicit drugs, to the point where the person’s ability to function in day to day life becomes impaired. People keep using the substance even when they know it is causing or will cause problems. The most severe SUDs are sometimes called addictions.
Effects of SUD
People with a substance use disorder may have distorted thinking and behaviors. Changes in the brain’s structure and function are what cause people to have intense cravings, changes in personality, abnormal movements, and other behaviors. Brain imaging studies show changes in the areas of the brain that relate to judgment, decision making, learning, memory, and behavioral control.
Repeated substance use can cause changes in how the brain functions. These changes can last long after the immediate effects of the substance wears off, or in other words, after the period of intoxication. Intoxication is the intense pleasure, euphoria, calm, increased perception and sense, and other feelings that are caused by the substance. Intoxication symptoms are different for each substance.
When someone has a substance use disorder, they usually build up a tolerance to the substance, meaning they need larger amounts to feel the effects.
Symptoms of SUD
Impaired control: a craving or strong urge to use the substance; desire or failed attempts to cut down or control substance use
Social problems: substance use causes failure to complete major tasks at work, school or home; social, work or leisure activities are given up or cut back because of substance use
Risky use: substance is used in risky settings; continued use despite known problems
Drug effects: tolerance (need for larger amounts to get the same effect); withdrawal symptoms (different for each substance)
Reasons for Drug Use
According to the National Institute on Drug Abuse, people begin taking drugs for a variety of reasons, including:
to feel good — feeling of pleasure, “high” or "intoxication"
to feel better — relieve stress, forget problems, or feel numb
to do better — improve performance or thinking
curiosity and peer pressure or experimenting