When she first started taking drugs, a person suffering from an addiction found that they markedly affected her perceptions. Now, however, she finds that greater dosages are required to achieve the same effects. The addict is experiencing

Question

Quizplus · Accepted Answer

Tolerance occurs when a person needs to consume a larger amount of a substance to achieve the same effects that were previously obtained with a smaller amount, as their body has adapted to the substance.  Repeated episodes of drug use condition the brain to produce responses that push back against the drug's effects. Because the body pushes back, greater doses are required for the drug to have the same effect.

When She First Started Taking Drugs, a Person Suffering from an Addiction