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Erectile Dysfunction. Stephen Mark Christchurch. Normal erectile function: Physical and Psychological factors. Erectile function is about performance. Erectile dysfunction is common. Causes of Erecitle dysfunction. Performance anxiety. Heart and Vascular disease. Depression. Diabetes.
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Erectile Dysfunction Stephen Mark Christchurch
Normal erectile function: Physical and Psychological factors
Causes of Erecitle dysfunction Performance anxiety
Drugs: over 200 drugs antihypertensives heart medication antidepressants alcohol
smoking Stopping smoking does improve erectile function
Effective treatment is available: at a cost…... Reducing risk factors and psychological treatment has little effect
Drug therapy: PDE5 Inhibitors 10 years since launch NZ: 150,000 units ( 4 tablets) annually 61% market share
Background Original drug developed for BP Patented 1996 1999-2001 over $1 billion sales First drug direct to patient advertisement Online prescription 10X Off patent 2011
Viagra is effective! …other uses… Sports performance Altitude sickness Jet lag Prevent plant wilting
Contraindications PDE5 Inhibitors Recent MI/CVA Patients on nitrates Unstable CV disease Liver disorders
Drug dosing Initial dose 50 mg Increase to 100mg if not effective By 4th dose standard effect Delayed absorption by alcohol and fatty foods
Is Viagra effective in men without ED Definitely safe EAU 2008 Placebo controlled RCT in men without ED Men have a “real” benefit in quality and durability of erections
Cialis Longer acting… up to 48 hours Less effect with alcohol and fat 31% market share
Marketing ED drugs Controversial Improved patient awareness More open discussion Intrusive
Levitra Similar to Viagra minimal marketing 7% market share
Online sales Little info significant fraud more than 10X prescription sales
Injectable agents Alprostadil/Caverject or other mixtures direct vasodilators over 80% effective poor long term use Post radical prostatectomy
Vacuum devices Improves poor quality erection useful aid uncomfortable
Penile Prosthesis Expensive so low utilisation Use: trauma, post radical Excellent results