Answer:
Option A, notify the clinic of any changes in the color of urine
Step-by-step explanation:
Metronidazole is an anti-infective, antiprotozoal, and antiulcer medication indicated for treatment of anaerobic infections. It also has an off-label use for giardiasis. Photosensitivity is not a known side effect of this medication so avoiding overexposure to sun is not something to include in the patient teaching as suggested by option B. The medication is to be administered on an empty stomach or possibly food or milk if GI irritation occurs; because their is an option to disregard food, option D is also not particularly included in this manner. Patients are instructed to take the full course of metronidazole, making sure not to double dose, even if they feel better and the diarrhea resolves, thereby ruling out option C.
As a nurse, the patient's intake, output, and body weight are of concern in order to monitor for signs of infection, including the stool and the urine. So option A is your answer: the patient is to notify the healthcare providers of any changes in urine.