The Abstinence syndrome refers to a characteristic cluster of symptoms that results from a sudden decrease in the level of usage of a substance.

Abstinence syndrome, also known as withdrawal syndrome, is a set of physical and psychological symptoms that occur after an individual stops using an addictive substance or engaging in an addictive behavior. These symptoms can be both physical and psychological, and can vary in severity depending on the substance or behavior and the duration and intensity of use.

Some examples of addictive substances that can lead to abstinence syndrome include alcohol, opioids, benzodiazepines, and stimulants such as cocaine and amphetamines. Examples of addictive behaviors that can lead to abstinence syndrome include gambling and internet or video game addiction.

Symptoms of abstinence syndrome can include anxiety, restlessness, insomnia, sweating, tremors, nausea and vomiting, muscle aches, and in severe cases, seizures and delirium. Treatment for abstinence syndrome may involve medication to manage symptoms, therapy to address the underlying addiction, and support from friends, family, and support groups.