Erectile Dysfunction Management in Patients on Losartan and Nifedipine

First-Line Recommendation

The American Urological Association recommends starting with sildenafil 50 mg as first-line therapy, taken approximately 1 hour before sexual activity, due to its established safety in patients on antihypertensive medications like losartan and nifedipine 1
All FDA-approved PDE5 inhibitors (sildenafil, tadalafil, vardenafil, and avanafil) have similar efficacy for erectile dysfunction, and the choice should be based on individual preferences, cost, and side effect profile 2

Avanafil has the lowest rates of dyspepsia among all PDE5 inhibitors and similar efficacy to sildenafil 2, 4
Tadalafil has a longer duration of action (up to 36 hours) and lower rates of myalgia compared to other PDE5 inhibitors 3, 4

The American College of Cardiology recommends assessing cardiovascular risk stratification before prescribing PDE5 inhibitors, and patients who cannot perform moderate exercise should be referred to cardiology 4
Do NOT prescribe any PDE5 inhibitor if the patient is taking nitrates due to risk of life-threatening hypotension 2, 4

In patients with mild to moderate hepatic or renal impairment, start with lower doses (sildenafil 25 mg) 1, 4
Elderly patients should also start at the lower end of the dosing range 1

Headache, flushing, nasal congestion, and dyspepsia are common side effects of PDE5 inhibitors, with dyspepsia being least common with avanafil 2, 4

Verify proper use, titrate to maximum tolerated dose, and consider testosterone deficiency before declaring treatment failure 1, 2, 4
Diabetic patients typically need higher doses and may respond less robustly 1, 2, 4