Name pharmacologic tolerance and physical dependence in the context of sleep medications.

• A. Tolerance: need for higher doses to achieve the same effect; Dependence: withdrawal symptoms when stopping or reducing
• B. Tolerance: withdrawal symptoms; Dependence: craving only
• C. Tolerance: decreased effect with time; Dependence: increased appetite
• D. Tolerance: none; Dependence: none

Answer: (A)

Pharmacologic tolerance and physical dependence are two distinct responses that can occur with sleep medications. Tolerance means you need a higher dose to achieve the same sleep-promoting effect because the body adapts to the drug over time. Physical dependence means the body has become accustomed to the drug to the extent that stopping or lowering the dose causes withdrawal symptoms. With sleep meds like benzodiazepines or Z-drugs, tolerance can develop with ongoing use, leading to reduced efficacy and possible rebound insomnia when the drug is reduced or stopped. Physical dependence can manifest as withdrawal symptoms such as insomnia, anxiety, tremors, sweating, or flu-like symptoms if the medication is abruptly discontinued or dose is reduced. That’s why the correct understanding is that tolerance is about needing more to get the same effect, while dependence is about withdrawal upon stopping or reducing the drug.