Drug abuses occurs when you are not able to control your use of prescribed drugs or are using an illegal substance to the point that it interferes with your ability to function. According to the National Institutes of Health, about 40 million illn...
Nicotine addiction occurs when a person becomes addicted to nicotine, which is a chemical found in tobacco. The addiction is physical, mental, and behavioral.
Drinking too much alcohol, or being unable to control consumption, can indicate alcohol abuse or alcoholism. Too much alcohol in the blood or having withdrawal can lead to serious mental and physical symptoms.