Management of Erectile Dysfunction After PDE5 Inhibitor Failure

Patient Evaluation and Optimization

The American Urological Association recommends verifying an adequate trial of PDE5 inhibitors, with at least 5 attempts at maximum dose, before declaring treatment failure 1
The European Association of Urology suggests assessing proper timing of PDE5 inhibitor intake, with sildenafil and vardenafil taken 1 hour before sexual activity, and tadalafil taken 30 minutes to 36 hours before 1
The American College of Cardiology recommends screening for heavy alcohol use, as excessive alcohol impairs erectile function and reduces PDE5 inhibitor efficacy 1
The Princeton III Consensus recommends evaluating relationship factors, such as partner issues or inadequate foreplay, which may prevent adequate sexual stimulation 1

The Endocrine Society recommends measuring morning total testosterone, free testosterone, and SHBG in all men with PDE5 inhibitor failure 1
The American Urological Association suggests adding testosterone replacement therapy to the PDE5 inhibitor regimen if testosterone levels are low (<300 ng/dL), as combination therapy is more effective than either alone 2, 1
The Princeton III Consensus recommends testosterone replacement therapy for men with low (<230 ng/dL) or intermediate (230-350 ng/dL) testosterone levels, either as initial treatment or added after PDE5 inhibitor failure 3

The American Urological Association recommends trying a different PDE5 inhibitor before abandoning this drug class entirely 1
The European Association of Urology suggests considering intraurethral alprostadil (MUSE) as a second-line option for men who fail oral PDE5 inhibitors 1
The American College of Cardiology recommends intracavernosal injection therapy, vacuum erection devices, and penile prosthesis as alternative options for men who fail oral PDE5 inhibitors 1, 2

The American Heart Association recommends comprehensive cardiovascular risk reduction, including weight loss, exercise, and optimization of blood pressure control, to improve overall vascular health and sexual function 3
The American College of Cardiology suggests that statin therapy may improve erectile function, though data are mixed 3
The American Urological Association recommends smoking cessation as critical for improving erectile function 2

The American College of Cardiology recommends never combining PDE5 inhibitors with nitrates, as this combination causes potentially fatal hypotension 5, 1, 6
The American Heart Association suggests reassessing cardiovascular risk, as ED may be the first manifestation of cardiovascular disease requiring further evaluation 3
The European Association of Urology recommends that high-risk patients (unstable angina, uncontrolled hypertension, recent MI, severe heart failure) should defer sexual activity until cardiac condition is stabilized 3