Certified Addictions Registered Nurse (CARN) Advanced Practice (AP) Practice Test

Tolerance to benzodiazepines develops as the brain adapts to continued exposure to the drug. Over time, changes in GABA-A receptor function and neural circuits reduce the drug’s effects, so larger or more frequent doses may be needed to achieve the same level of relief or sedation. In practice, noticeable tolerance to common benzodiazepine effects often emerges after months of daily use rather than days. By about six months of ongoing use, many patients experience diminished response to the same dose across several effects (anxiolysis, sedation, amnesia, etc.), making the six-month timeframe a reasonable expectation for tolerance to accumulate. This is why the option stating tolerance can develop within six months is the best choice. It’s important to distinguish tolerance from dependence: tolerance is a reduced effect requiring dose changes, whereas dependence involves withdrawal symptoms and physiological adaptation upon stopping. Shorter intervals (like a few days) are generally too early for broad tolerance to have developed, and “never” isn’t accurate given the brain’s adaptive capacity with sustained exposure.