Which of the following is a common withdrawal symptom from alcohol?

Nausea and vomiting is a common withdrawal symptom from alcohol due to the way the body reacts to the absence of alcohol after prolonged use. Alcohol has a significant impact on the central nervous system and when it is withdrawn, the body goes through a period of adjustment. This can lead to a range of physical and psychological symptoms, and gastrointestinal distress, including nausea and vomiting, is frequently reported.

Increased appetite typically does not occur during withdrawal and may not be characterized by the body’s reaction as it focuses on managing the stress of withdrawal. Similarly, alcohol withdrawal does not enhance mood; instead, it often leads to anxiety, irritability, and mood swings. Improved sleep quality is also unlikely, as insomnia and restless sleep are common difficulties during alcohol withdrawal due to disturbances in the body's natural rhythms and reliance on alcohol for sleep regulation.