A 55-year-old man presents at the clinic complaining of erectile dysfunction. The patient has a history of diabetes. The physician

Answer Explanation: Patients with cataracts, hypotension, or nephropathy will be allowed to take tadalafil (Cialis) and sildenafil (Viagra) if needed. However, tadalafil (Cialis) and sildenafil (Viagra) are usually contraindicated with diabetic retinopathy.

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