When a drug dosage is increased to achieve the same effect as the first dosage, what has increased?
  1. Drug tolerance
  2. Drug reliability
  3. Drug ineffectiveness
  4. Drug duration
Explanation
Answer: A - When a drug dosage is increased to achieve the same effect as the first dosage, drug tolerance has occurred. Drug tolerance can be physiological and psychological and can be due to drug abuse or a natural occurrence from constant exposure.
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