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Drug tolerance or drug insensitivity is a pharmacological concept describing subjects' reduced reaction to a drug following its repeated use. Increasing its dosage may re-amplify the drug's effects; however, this may accelerate tolerance, further reducing the drug's effects.
The process responsible for the induction of psychological dependence is a negative feedback mechanism that involves neuronal-counter adaptation, leading to tolerance to the desirable effects of certain drugs or stimuli and a subsequent withdrawal syndrome upon abrupt cessation of exposure.
Reverse tolerance or drug sensitization is a pharmacological phenomenon describing subjects' increased reaction (positive or negative) to a drug following its repeated use. [4] Not all drugs are subject to reverse tolerance. This is the opposite of drug tolerance, in which the effect or the subject's reaction decreases following its repeated ...
Substance dependence, also known as drug dependence, is a biopsychological situation whereby an individual's functionality is dependent on the necessitated re-consumption of a psychoactive substance because of an adaptive state that has developed within the individual from psychoactive substance consumption that results in the experience of withdrawal and that necessitates the re-consumption ...
An issue with this theory is that most addictive drugs cause an individual to build up a tolerance and the effects of the drug will decrease as an individual's tolerance increases. This requires individuals to use a higher dosage of the substance which in many causes can cause adverse side effects. [34] Dopamine is correlated with increased ...
drug sensitization or reverse tolerance – the escalating effect of a drug resulting from repeated administration at a given dose; drug withdrawal – symptoms that occur upon cessation of repeated drug use; physical dependence – dependence that involves persistent physical–somatic withdrawal symptoms (e.g., fatigue and delirium tremens)
When substituted amphetamines are used, drug tolerance develops rapidly. [8] Amphetamine dependence has shown to have the highest remission rate compared to cannabis, cocaine, and opioids. [ 9 ] Severe withdrawal associated with dependence from recreational substituted amphetamine use can be difficult for a user to cope with.
addictive drug – psychoactive substances that with repeated use are associated with significantly higher rates of substance use disorders, due in large part to the drug's effect on brain reward systems; dependence – an adaptive state associated with a withdrawal syndrome upon cessation of repeated exposure to a stimulus (e.g., drug intake)