Sildenafil (Viagra): medicine for erection problems - NHS Find out how sildenafil treats erection problems and pulmonary hypertension and how to take it NHS medicines information on sildenafil – what it's used for, side effects, dosage and who can take it
Sildenafil: View Uses, Side Effects and Medicines | 1mg Sildenafil is a phosphodiesterase-5 (PDE-5) inhibitor It works by relaxing the blood vessels in your penis, thereby increasing blood flow into the penis on sexual stimulation