An addict is a person who has an uncontrollable compulsion to repeat a behavior regardless of its negative consequence. There are many drugs that can lead to a condition recognized as addiction. The common symptoms are a craving for more of the drug, increased psychological tolerance to exposure, and withdrawal symptoms in the absence of the stimulus. A risk of dependency exists in most drugs that directly provide pleasure or relief.
There are two types of dependency physical and psychological. Physical dependency on a substance is defined by the appearance of characteristic withdrawal symptoms when the drug is suddenly discontinued. Opioids, benzodiazepines, barbiturates, alcohol and nicotine are well known addictive drugs known for their ability to induce physical dependence. Cortisone, beta-blockers and most antidepressants are examples of similar such drugs, but they are not addictive. Some highly addictive drugs, such as cocaine, induce little physical dependence too. The main characteristic of an addictive drug is its ability to induce euphoria while causing harm.
The dependency of the mind leads to psychological withdrawal symptoms. Eating disorders are...