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The hospital Pharmacy and Therapeutics Committee determines that Drug X and Drug Y are equally effective, but Drug X is preferred because of cost. If a patient is admitted to the hospital on Drug Y and switched to Drug X, what is this an example of?

A therapeutic interchange

Therapeutic interchanges allow for the substitution of one medication to an alternative, more preferred medication. Patients should be informed if their medications are interchanged or substituted in this way.