A postoperative patient is receiving morphine sulfate from a patient-controlled analgesia device.On assessment,the nurse notes that the patient's respirations are depressed.The nurse realizes the effect of morphine sulfate infusion can be labeled as which of the following?

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Toxic effects are capable of causing injury or death.They often develop after prolonged intake of a medication or when a medication accumulates in the blood because of impaired metabolism or excretion.When patients become immunologically sensitized to a medication after taking at least one dose,allergic reactions occur.When a patient's immune system causes abnormal reactions to a medication,the patient has a medication allergy.Each medication has a therapeutic effect,the intended or desired physiological response of a medication.Some medications cause unpredictable effects,such as idiosyncratic reactions,in which a patient overreacts or underreacts to a medication or has a reaction different from what is expected.

A Postoperative Patient Is Receiving Morphine Sulfate from a Patient-Controlled