Why can humans build up a tolerance to some medications but not others?

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Edit: Thank you very much for the gold! I hope the comments made to this post were as helpful to others as they were to me.

In: Biology

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Anonymous 0 Comments

An important distinction to make here, as it’s often misunderstood: **tolerance** and drug **resistance** are not the same thing.

**Tolerance** is the reduced reaction of a human patient to drugs due to repeated or prolonged use.

**Resistance** is the reduction of effectiveness of antibiotic and antiviral drugs due to the acquired resistance of the bacteria or viruses they are meant to treat. Simply put, resistance is a bacteria learning to defend itself against antibiotics, resulting in stronger pathogens which cannot be fought against with routine antibiotics. This endangers patients in the long-term as antibiotics simply stop working to protect us. Routine surgeries become more dangerous as a minor infection can become deadly.

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