The patient's respirations dropped from 14 breaths/minute to 8 breaths/minute after receiving a large dose of morphine.Which term accurately describes the patient's reaction to the morphine?

A) Toxic
B) Allergic
C) Therapeutic
D) Idiosyncratic

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.