What is 'tolerance building'?
Direct Answer
Tolerance building describes the process where a person's body adapts to a substance, leading to a reduced response over time. This means that progressively larger doses of the substance are needed to achieve the same initial effect. Tolerance building is a physiological phenomenon and is distinct from psychological dependence.
Common Misunderstandings
["This does not mean that tolerance automatically equates to addiction. While tolerance is a component of many substance use disorders, it can also occur with prescribed medications used non-recreationally, such as certain pain relievers.","This does not mean that tolerance developing quickly is always a 'big deal' in terms of immediate danger. The significance of tolerance building varies greatly depending on the substance, the individual, and the context of use. For some substances, rapid tolerance can indicate a higher potential for dependence; for others, it is an expected pharmacological effect.","This does not mean that reduced sensitivity to a substance is always 'tolerance.' Other factors, such as metabolism changes or drug interactions, can also alter a substance's effects, which are not necessarily tolerance building."]
In Practice
Tolerance building means that the body's systems, particularly the nervous system, adjust to the presence of a substance. This adjustment can manifest as a decrease in the substance's therapeutic effects or its intoxicating properties. For example, a person might initially feel relief from pain with a certain dose of a medication; over time, that same dose may become less effective, requiring an increase to achieve the prior level of relief. This physiological adaptation occurs as the body attempts to maintain homeostasis despite the introduced substance.
What This Does NOT Mean
["This does not mean that someone with tolerance is necessarily experiencing withdrawal symptoms when they stop using the substance. While tolerance often precedes physical dependence and withdrawal, it is possible to develop tolerance without experiencing withdrawal upon cessation.","This does not include behavioral tolerance, which refers to learning to function despite a substance's effects. Tolerance building specifically refers to the physiological changes occurring within the body.","This does not imply a specific duration for tolerance to develop. The speed at which tolerance builds varies widely by substance; for example, tolerance to opioids can develop relatively quickly, while tolerance to other substances may develop more slowly or not at all."]
Scope
This information is for reference purposes only and does not constitute medical or professional advice.