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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 ?
D'esclaves de guerre a trafiques du developpement De la dependance des Etats a la main-d'oeuvre
Diversification of electricity generation mix, diversification of sources of energy supply, taking advantage of Pakistan's strategic location, creating dependance of other countries on our power, using our strategic location for our geo political agenda.
Dans les cas de dependance a l'alcool, par exemple, certaines donnees laissent entrevoir des similitudes entre le craving et un processus d'intensite obsessionnel (Modell, Glaser, Cyr et Mountz, 1992).
Compression stress dependance on density, amount of the binder and granulometric composition is described by the regression equation
Our dependance on foreign oil will not end any time soon--especially as the world's economy begins to revive and demand subsequently increases.
En somme, le probleme des theoriciens developpementalistes et de la dependance est qu'ils sont demeures dans un optique nationaliste et interclassiste, qu'ils ne se sont pas interesses aux luttes sociales, ce qui, finalement, les a empeches d'asseoir leurs politiques economiques de developpement sur une base sociale.
Surveillance services for the objects Headquarters / Dependance Margareten - 1050 Vienna, Einsiedlergasse 2 Towing group - 1110 Vienna, Jedletzbergerstrae 1 Waste Logistics Center - 1110 Vienna, Johann-Petrak-Gasse 5 Mist Place Auhof - 1140 Vienna, Wientalstrae 51 Engineering Center, Garage Hernals - 1170 Vienna, Richthausenstrae 2.
Le plan d'action du gouvernement, adopte recemment en Conseil des ministres, s'articule autour de plusieurs axes notamment la consolidation de la democratie, la preservation des acquis sociaux et la promotion d'une economie diversifiee liberee de la dependance aux hydrocarbures , preservation de la securite, la stabilite et l'unite du pays et la poursuite d'une diplomatie dynamique
Concretement, le but est de responsabiliser davantage ces secteurs pour reduire la facture energetique qui s'eleve annuellement a pas moins de 52,5 milliards de dirhams, dont 93,3 millions importes de l'exterieur, placant ainsi le Maroc dans une situation de dependance energetique.
RESUME La consommation et la dependance aux drogues furent longtemps considerees comme un probleme typiquement masculin.
Le gaz de schiste represente une nouvelle ressource energetique potentielle prometteuse pour le Royaume-Uni, qui peut contribuer significativement a notre securite energetique en reduisant notre dependance vis-a-vis du gaz importe", a explique le ministre charge de l'Energie et du Changement climatique, Edward Davey.