A nurse is providing teaching to the guardians of a newborn about measures to prevent sudden infant death syndrome (SIDS). Which of the following guardian statements indicates an understanding of the teaching?

- A. Diarrhea is not an adverse effect of amitriptyline, which is a tricyclic antidepressant (TCA). Diarrhea may be caused by other factors, such as infection, food intolerance, or stress. Therefore, this choice is incorrect.

- B. Frequent urination is not an adverse effect of amitriptyline either. Frequent urination may be a sign of diabetes, urinary tract infection, or other conditions that affect the kidneys or bladder. Therefore, this choice is also incorrect.

- C. Excessive salivation is not an adverse effect of amitriptyline as well. Excessive salivation may be due to increased production of saliva, difficulty swallowing, or mouth irritation. Therefore, this choice is incorrect too.

- D. Blurred vision is an adverse effect of amitriptyline and other TCAs. Amitriptyline can cause anticholinergic effects, such as dry mouth, constipation, urinary retention, and blurred vision. These effects are more pronounced in older adults and can impair their daily functioning and quality of life. Therefore, this choice is correct and the nurse should identify it as an adverse effect of the medication.

- A is incorrect because massaging bony prominences on the client's left side can increase the risk of skin breakdown and pressure ulcers. The nurse should avoid applying pressure to areas with impaired circulation or sensation.

- B is correct because supporting the client's left arm on a pillow while sitting can prevent edema, contractures, and nerve damage. The nurse should also encourage the client to perform active and passive range of motion exercises on their left arm.

- C is incorrect because positioning the bedside table on the client's left side can discourage the client from using their right side, which can lead to neglect and learned nonuse. The nurse should position the bedside table on the client's right side and encourage them to reach for items with their right hand.

- D is incorrect because placing the client's cane on their left side while ambulating can cause instability and falls. The nurse should place the cane on the client's right side and instruct them to move their left leg and cane together, followed by their right leg.