The diminishing effect with regular use of the same dose of a drug, requiring larger doses before experiencing the drug's effect?

The diminishing effect with regular use of the same dose of a drug, requiring larger doses before experiencing the drug's effect?

• A. Tolerance
• B. Withdrawal
• C. Dependence
• D. Craving

Answer: (A)

Tolerance is the diminished response to a drug that occurs with repeated use, so a person needs larger doses to achieve the same effect. This happens because the body adapts in two main ways: pharmacodynamic changes, like receptors becoming less sensitive or fewer in number, and pharmacokinetic changes, such as increased metabolism that breaks down the drug faster. As a result, the same amount of drug produces a weaker effect over time. Withdrawal, dependence, and craving describe different phenomena. Withdrawal are the symptoms that occur when stopping the drug, dependence is a state of adaptation that can include withdrawal and cravings, and craving is the strong desire to use the drug.

Tolerance is the diminished response to a drug that occurs with repeated use, so a person needs larger doses to achieve the same effect. This happens because the body adapts in two main ways: pharmacodynamic changes, like receptors becoming less sensitive or fewer in number, and pharmacokinetic changes, such as increased metabolism that breaks down the drug faster. As a result, the same amount of drug produces a weaker effect over time.

Withdrawal, dependence, and craving describe different phenomena. Withdrawal are the symptoms that occur when stopping the drug, dependence is a state of adaptation that can include withdrawal and cravings, and craving is the strong desire to use the drug.