Which male client should the nurse consider at risk for complications when taking sildenafil (Viagra), a sexual stimulant? 1. A 56-year-old client with unstable angina. 2. An 87-year-old client with...

Which male client should the nurse consider at risk for complications when taking sildenafil (Viagra), a sexual stimulant?

1. A 56-year-old client with unstable angina.

2. An 87-year-old client with glaucoma.

3. A 44-year-old client with type 2 diabetes.

4. A 32-year-old client with an L1 spinal cord injury (SCI).