What is tolerance in the context of substance use?

Tolerance in the context of substance use refers to the need for increased amounts of the substance to achieve the desired effect. This phenomenon occurs when an individual's body becomes accustomed to the presence of a drug, resulting in a diminished response to the same dosage over time. As a result, the person may find that they must consume more of the substance to experience the effects they initially had at lower doses. This process can lead to escalating use, dependency, and potentially increased risk of negative health outcomes.

The other options describe different aspects of substance use and its effects. The physical symptoms experienced when not using the substance pertain to withdrawal, which is distinct from tolerance. The emotional response from social or recreational use typically relates to the psychological aspects of substance use but does not define tolerance. The legal consequences faced when using substances deal with the societal and criminal implications of substance use, rather than the physiological changes that occur within the body.