The Client Is Being Treated with Metronidazole

The client is being treated with Metronidazole. She complains to the nurse of experiencing reddish brown urine. The nurse interprets this finding as a(n) :

A) potentially life-threatening reaction to the medication.
B) symptom of an anaphylactic reaction to the medication.
C) sign that the medication dosage needs to be increased.
D) expected side effect of a high dose of the medication.