A patient with external otitis is prescribed an otic form of chloramphenicol. Which of the fol-lowing adverse drug effects is most commonly associated with this medication?
a. Contact dermatitis
b. Ringing in the ears
c. Dizziness
d. Drug resistance
ANS: A
Contact dermatitis is the most common adverse drug effect, which is manifested by itching, burning, angioneurotic edema, urticaria, vesicular lesions, and maculopapular dermatitis.
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