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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 ?
Les enfants livres a eux-memes, sans autre compagnie que la console ou l'ordinateur, sont plus susceptibles de developper une dependance aux jeux que les autres.
Investors are cautioned that such forward looking statements involve risks and uncertainties, including without limitation continued acceptance of the company's products, increased levels of competition for the company, the company's dependance upon third-party suppliers, and other risks.
beaucoup moins que] Ce projet va nous permettre d'attenuer notre dependance alimentaire vis-a-vis de l'exterieur [beaucoup plus grand que], estime Alioui en appelant les investisseurs a [beaucoup moins que] adherer a cet important projet qui peut aider le pays a diversifier son economie [beaucoup plus grand que].
Contact point(s): Entreprendre pour humaniser la dependance
Elle etablit un rapport de dependance du premier a l'egard du second.
Il a explique que les femmes et les enfants sont les plus vulnerables vis-a-vis de cette situation de non-droit et ne disposent que de la precarite rendue perenne du fait de la dependance vis-a-vis de l'action humanitaire.
Quant a la dependance de l'Organe, il s'agit d'appels a ce qu'il soit independant de toute autorite que ce soit le Parlement ou la Presidence.
Les employes qui revendiquent le transfert de la dependance de l'Organisme du Transport public du gouvernorat du Caire au ministere du Transport, ont concretise leurs menaces et arrete le travail dans pres de 28 garages, en plus de l'arret egalement du travail dans la Compagnie d'autobus du Grand Caire.
Ce dernier (le developpement local) constitue un moyen de [beaucoup moins que] rompre progressivement avec la dependance aux hydrocarbures a travers l'elimination des contraintes bureaucratiques (a) entravant la liberation de l'investissement et l'adhesion des jeunes aux differents dispositifs de l'emploi [beaucoup plus grand que].
As per UAE Minister of Energy Suhail Al-Mazroui, the United Arab Emirates (UAE) has lowered the oil dependance as a source of economic growth.
D'une maniere generale, le tabac entraEne une dependance qui est une perte de liberte, une sorte d'esclavage dont il est difficile de se departir, car la dependance a la nicotine est a la fois physique et psychologique, c'est ce qui rend fumer aussi insidieux.
Ne flechissant point a cause du debut de l'annee scolaire, les employes des Transports campent sur leurs positions, en voyant leurs revendications restees lettre morte, notamment celle du transfert de la dependance de l'Organisme public des Transports du gouvernorat du Caire, vers le ministere des Transports.