• Amr Abdel Raheem and Philip Kell.
• St. Peter's Andrology Department, The Institute of Urology, London, and Cairo University, Egypt;
• Patient Prefer Adher. 2009 Nov 3; 3: 9910499-104.

AbstractErectile dysfunction (ED) is a problem that may affect up to 52% of men between the ages of 40 and 70. It can be distressing because of its negative effect on self-esteem, quality of life, and interpersonal relationships. Oral phosphodiesterase-5 inhibitors (PDE5 inhibitors) are now the first choice of treatment in ED. The availability of three (sildenafil citrate, tadalafil, and vardenafil) well tolerated and effective oral PDE5 inhibitors gives treatment options for men with ED. Although the mechanism of action is the same for the three drugs, they differ in their pharmacokinetics. Several preference studies were conducted between the three PDE5 inhibitors but they were not free from bias. Because of the lack of overwhelming reliable data showing that one PDE5 inhibitor is superior to another, current opinion is that the individual patient should have the opportunity to test all three drugs and then select the one that best suits him and his partner.

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