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Why do I need more of my medicine for it to have the effect I'm used to?

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This happens when you have developed tolerance to a drug. Tolerance is a normal physiological response to narcotics and occurs when the initial dose of a substance loses its effectiveness over time. Changing the dose or the medication often solves the problem. Just because you have become tolerant to a drug does not mean that you are addicted to that drug.

SOURCE: 

American Academy of Family Physicians.

Reviewed by Sabrina Felson on October 23, 2018

SOURCE: 

American Academy of Family Physicians.

Reviewed by Sabrina Felson on October 23, 2018

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What is complex regional pain syndrome (CRPS)?

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