A(n) _______ occurs when one medication modifies the action of another medication.

A) medication allergy
B) anaphylactic reaction
C) medication interaction
D) idiosyncratic reaction

A medication interaction occurs when one medication modifies the action of another medication.Allergic symptoms vary,depending on an individual and the medication; they range from mild to severe.Sudden constriction of bronchiolar muscles,edema of the pharynx and larynx,and severe wheezing and shortness of breath all characterize severe or anaphylactic reactions.When a patient's immune system causes abnormal reactions to a medication,the patient has a medication allergy.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.