What Is a Substance Use Disorder (SUD)?
A substance use disorder is a medical condition that’s defined by the inability to control the use of a certain substance, despite health or interpersonal problems. The use of drugs or alcohol crosses into a substance use disorder when someone compulsively misuses a substance and continues to use it, even if they recognize the negative impact it has in their life.[2]
The American Psychiatric Association (APA) established diagnostic criteria for substance use disorders in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5):
- Alcohol use disorder
- Cannabis use disorder, or marijuana use disorder
- Inhalant use disorder
- Opioid use disorder
- Sedative, hypnotic, or anxiolytic use disorder
- Phencyclidine use disorder’
- Other hallucinogen use disorder (excluding phencyclidine)
Stimulant use disorder, which includes methamphetamine use disorder and cocaine use disorder[3]
Symptoms of Substance Use Disorder
The signs and symptoms of a substance use disorder can vary by the substance but may include:
- Having frequent fights, accidents, or legal trouble
- Missing school or work
- Secretive or suspicious behavior
- Changes in appetite or sleep
- Personality or attitude changes
- Mood swings or irritability
- Unusual activity levels
- Bloodshot eyes or small pupils
- Lack of motivation
- Poor physical appearance
- Sudden weight changes
- Unusual odors
- Slurred speech or tremors
- Changes in social circle
- Asking for money[5]