What is contingent drug tolerance?

What is contingent drug tolerance?

• A. Tolerance develops to all effects of the drug
• B. Tolerance refers to withdrawal symptoms
• C. Tolerance only develops to drug effects that are experienced
• D. Tolerance is immediate after first use

Answer: (C)

Contingent drug tolerance means tolerance develops only to the effects that are actually experienced with the drug. When the body adapts, those adaptations are tied to the specific effects that occur during use; if a particular effect isn’t produced (or isn’t noticed), there’s no tolerance built for that effect. This explains why tolerance isn’t universal across all drug effects. For example, in experiments that look at context-specific or learned tolerance, animals show reduced responses to the drug’s effects in the environment where they’ve taken it, but not in a new environment—tolerance is contingent on what is experienced. So tolerance is best understood as effect-specific rather than automatic for every consequence of the drug.

Contingent drug tolerance means tolerance develops only to the effects that are actually experienced with the drug. When the body adapts, those adaptations are tied to the specific effects that occur during use; if a particular effect isn’t produced (or isn’t noticed), there’s no tolerance built for that effect. This explains why tolerance isn’t universal across all drug effects. For example, in experiments that look at context-specific or learned tolerance, animals show reduced responses to the drug’s effects in the environment where they’ve taken it, but not in a new environment—tolerance is contingent on what is experienced. So tolerance is best understood as effect-specific rather than automatic for every consequence of the drug.