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Many drugs or behaviors can precipitate a pattern of conditions recognized as addiction, which include a craving for more of the drug or behavior, increased physiological tolerance to exposure, and withdrawal symptoms in the absence of the stimulus. Most drugs and behaviors that directly provide either pleasure or relief from pain pose a risk of dependency. Addictions can also be formed due to opponent process reactions. For example the terror of jumping out of an airplane is rewarded with intense pleasure when the parachute opens. Because of opponent process criminal behavior, running, stealing, violence, acting, test taking can become habit forming.
The medical community now carefully distinguishes between physical dependence and psychological addiction (or simply addiction). Addiction is now narrowly defined as "uncontrolled, compulsive use despite harm"; if there is no harm to the patient or another party, there is no addiction. The obsolete term physical addiction is deprecated because of its pejorative connotations, especially in modern pain management with opioids where physical dependence is nearly universal but addiction is rare.
Physical dependency on a substance is defined by the appearance of characteristic withdrawal symptoms when the drug is suddenly discontinued. While opioids, benzodiazepines, barbiturates, alcohol and nicotine are all well known for their ability to induce physical dependence, other drugs share this property that are not considered addictive: cortisone, beta-blockers and most antidepressants are examples. Also, some highly addictive drugs, such as cocaine, induce relatively little physical dependence. So while physical dependency can be a major factor in the psychology of addiction, the primary attribute of an addictive drug is its ability to induce euphoria while causing harm. Some drugs induce physical dependence - but not addiction - for example many laxatives, which are not psychoactive.
Psychological addictions are a dependency of the mind, and lead to psychological withdrawal symptoms. Addictions can theoretically form for any rewarding behavior, but typically only do so in individuals with emotional, social, or psychological dysfunctions, taking the place of normal positive stimuli not otherwise attained (see Rat Park). The distinction between the two kinds of addictions, however, is not always easy to make. Addictions often have both physical and psychological components.Not all doctors do agree on what addiction or dependency is. However, researchers, doctors, and popular literature discuss many addictions, including those to alcohol, tobacco, drugs, gambling , food, and even sex, pornography, computersComputer addiction is a field of psychotherapy that studies impacts of extensive or obsessive computer use on the user/ addict. It is relatively recent academically since widespread use of computers by the general public for non-professional purposes only and workA workaholic is a person addicted to work. This addiction may be pleasurable to the victim or it may be burdensome and troubling. The term is often used inaccurately to describe an energetic person who devotes a lot of time to work even though that person.
While eating disorders, like other behavioral addictions, are usually considered primarily psychological disorders, they are sometimes treated as addictions, especially if they include elements of addictive behavior. Sufferers may experience withdrawal or withdrawal-like symptoms if they alter their diet suddenly. This suggests that some common food substances, especially chocolateChocolate is a common ingredient in many kinds of sweets—one of the most popular in the world. Chocolate is made from the fermented, roasted and ground seeds of the tropical cacao tree Theobroma cacao''. The resulting product is known as "chocolate," an i, caffeineCaffeine is an alkaloid found naturally in such foods as coffee beans, tea, kola nuts, Yerba mate, guarana, and (in small amounts) cacao beans. It is added to some soft drinks such as colas and Mountain Dew. Caffeine has a characteristic intensely bitter, and sugarThis article deals with sugar as food and as an important, widely traded commodity; the word also has other uses; see Sugar (disambiguation A sugar is a form of carbohydrate; the most commonly used sugar is a white crystalline solid, sucrose; used to alte, may have the potential for addiction.
The speed with which a given individual becomes addicted to various substances varies with the substance, the frequency of use, the means of ingestion, and the individual. Some alcoholics report they exhibited alcoholic tendencies from the moment of first intoxication, while most people can drink socially without ever becoming addicted. Nicotine is considered by many to be the most addictive substance in the world.