A Patient Reports Becoming "Immune" to a Medication Because It

A patient reports becoming "immune" to a medication because it no longer works to alleviate symptoms. The nurse recognizes that this decreased effectiveness is likely caused by:

A) antagonists produced by the body that compete with the drug for receptor sites.
B) decreased selectivity of receptor sites, resulting in a variety of effects.
C) desensitization of receptor sites by continual exposure to the drug.
D) synthesis of more receptor sites in response to the medication.

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