Can I use viagra?

I am a 55-year-old man who is currently being treated for hypertension and diabetes. I recently noticed that my erection is very poor. I want to know if I can use Viagra for this?

Paul (by SMS)

Before using Viagra, it is important for you to make sure that both your Hypertension and Diabetes are under control. This is because both ailments when not well controlled can cause weak erection. In addition, some medications used to control Hypertension can also cause weak erection as their side effects. Therefore, it is important to review all the medications being used for your treatment.