When someone has an addition to alcohol or drugs, the addiction makes the user want more and more of the alcohol and drugs. Therefore, that is how the addicts stay addicted and sometimes want more and more. Sometimes, people will die from the excess alcohol or drugs they are ingesting. These people need help and they should go to a rehabilitation facility in order to get themselves off of drugs or alcohol.
At this place, medical staff can monitor their bodies to make sure that everything is okay. However, the addicts will suffer from withdrawal symptoms. Their bodies are craving the drugs and alcohol. They will need to cleanse or detox their bodies. This will make them very sick. They will probably throw-up.