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a need for something; sometimes used as a synonym for drug dependence.
chemical dependence (drug dependence) see drug dependence.
emotional dependence psychological dependence.
physical dependence (physiological dependence) drug dependence in which the drug is used to prevent withdrawal symptoms or in which it is associated with tolerance, or both.
psychoactive substance dependence drug dependence.
psychological dependence drug dependence in which the drug is used to obtain relief from tension or emotional discomfort; called also emotional dependence.
substance dependence drug dependence.


(dĕ-pen'dents), Avoid the misspelling dependance.
The quality or condition of relying on, being influenced by, or being subservient to a person, object, or substance, thus reflecting a particular need.
[L. dependeo, to hang from]


/de·pen·dence/ (de-pen´dens)
1. a state of relying on or requiring the aid of something.
2. a state in which there is a compulsive or chronic need, as for a drug; see substance d.

psychoactive substance dependence , substance dependence
1. compulsive use of a substance despite significant problems resulting from such use. Although tolerance and withdrawal were previously defined as necessary and sufficient for dependence, they are currently only two of several possible criteria.


Etymology: L, de + pendere, to hang upon
1 the state of being dependent.
2 the total psychophysical state of one addicted to drugs or alcohol who must receive an increasing amount of the substance to prevent the onset of withdrawal symptoms.


Psychiatry A CNS adaptation to the persistent presence of a sedative. See Substance dependence, Tobacco dependence. Cf Addiction Substance abuse A psychological or physiologic need to use a substance–usually a narcotic on a chronic and repeated basis; dependence on the drug may become overwhelming, compelling the user to sacrifice quality of life for the drug. See Addict. Cf Addiction.


The quality or condition of relying on, being influenced by, or being subservient to a person, substance, or object reflecting a particular need.
[L. dependeo, to hang from]


A state in which a person requires a steady concentration of a particular substance to avoid experiencing withdrawal symptoms.


(dĕ-pen'dĕns) Avoid the misspelling dependance.
The quality or condition of relying on, being influenced by, or being subservient to a person, object, or substance.
[L. dependeo, to hang from]

Patient discussion about dependence

Q. Is there any depression which is dependent on something. is there any depression which is dependent on something and whenever that thing strikes the depression arrives?

A. Well Anthony, almost all depression had some known dependency on something. But its regular dependency and frequency increment or decrement will differ a lot. One kind of depression like seasonal affective disorder (SAD) is where every individual remains depressed every year at the same time, which may be due to seasonal changes like winter and summer. In SAD the depression arrives every year at the same time and it seems to be arrival of depression dependent on the season.

Q. What is the difference between alcoholism, alcohol abuse and alcohol dependent?

A. Alcoholism is the high carve for drinking without caring for negative results it will have on physical, mental, emotional and social life. A binge drinker who continues to drink even though the problem has started in his normal life will lead to alcohol abuse and he may start the journey for alcoholism. In alcohol dependence the drinker steps up from the alcohol abuse and the crave increases in spite of the biggest problem on head. We can say that alcohol dependence is alcoholism.

Q. Does anyone have ideas for ways to overcome concentration problems without depending on medications? I'm reallllllly trying hard to study for my final exams and my ADD seems to bother me every time I touch the desk. Sometimes my thoughts fly out when I only think of how much I still have to study today!!! please- help if you can... I really don't want to start with meds...

A. Omega-3 fatty acids, phosphatidylserine, zinc and magnesium may have benefits with regard to ADD symptoms. i take omega-3 fatty acids every day for the past year and it helped me go threw a ruff year of studying.

More discussions about dependence
References in periodicals archive ?
Alkermes currently has two commercial products: RISPERDAL([R]) CONSTA([R]) [(risperidone) long-acting injection], the first and only long-acting atypical antipsychotic medication approved for use in schizophrenia, and marketed worldwide by Janssen-Cilag (Janssen), a wholly owned division of Johnson & Johnson; and VIVITROL([R]) (naltrexone for extended-release injectable suspension) the first and only once-monthly injectable medication approved for the treatment of alcohol dependence and marketed in the U.
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PROMETA represents an innovative approach to managing dependence on alcohol, cocaine or methamphetamines, as well as combinations of these drugs, that is designed to address the physiological, nutritional and psychosocial aspects of these multi-factorial diseases, and is thereby intended to offer patients an opportunity to achieve sustained recovery.
VIVITROL([R]) (naltrexone for extended-release injectable suspension) is the first and only once-monthly injectable medication approved for the treatment of alcohol dependence and is marketed in the United States primarily by Cephalon, Inc.
The Prometa protocols allow us to complement our current continuum of care in order to more efficiently deal with all aspects of substance dependence and recovery, including the physiological changes that are caused by this disease.
His relationships with the leading managed behavioral health care organizations and understanding of the costs and challenges that they face in providing treatment for alcoholism and substance dependence will provide Hythiam with the insight and advantage in developing tailored disease management solutions.
Privatklinik Meiringen seeks to diagnose, treat and offer psychological support for patients with substance dependence and psychiatric disorders.
It is well established that there is a tremendous public need for treatment alternatives for methamphetamine dependence.
To study e-cigarette dependence, researchers developed an online survey, including questions designed to assess previous dependence on cigarettes and almost identical questions to assess current dependence on e-cigs.
Following are WalletHub's 10 fairest and 10 least fair tax states, with each one's standing among all states in terms of its dependence on property taxes, sales and excise taxes, income and other taxes (1 = least dependent).
What is needed now is a coherent strategy that deals directly with our fundamental geopolitical dilemma: How to grow our economy while reducing our dependence on imported energy and, over time, carbon-emitting fuels.