When drug addicts stop taking drugs, they may experience withdrawal symptoms, which can vary in severity depending on the type of drug and the duration of use. Withdrawal symptoms may include physical symptoms such as nausea, vomiting, diarrhea, sweating, tremors, and seizures, as well as psychological symptoms such as anxiety, depression, irritability, and insomnia. These symptoms can make it difficult to quit drugs and can often lead to relapse. It is important for individuals to seek professional help when quitting drugs to manage withdrawal symptoms and increase their chances of successfully achieving long-term recovery.