Hormone Disorders account for fewer than 5% of cases of erectile dysfunction. An imbalance in hormones, such as testosterone, prolactin, or thyroid, can cause erectile dysfunction.

Age. Erection problems tend to become more common with age, but it can affect men at any age and at any time in their lives. Physical causes are more common in older men, while psychological causes are more common in younger men.

Treatment options

Erectile dysfunction is treatable at any age. In around 95% of the cases, a suitable treatment can be found.

There are three oral medications approved for the treatment of erectile dysfunction: sildenafil (Viagra), vardenafil (Levitra), and tadalafil (Cialis). All three medications belong to a class of drugs called phosphodiesterase (PDE) inhibitors. They block the enzyme phosphodiesterase-5 (PDE-5) and this helps maintain the levels of cyclic guanosine monophosphate (GMP), a chemical produced in the penis during sexual arousal. Balanced levels of GMP causes the smooth muscles of the penis to relax and increases blood flow. This allows a natural sequence to occur – an erection in response to sexual stimulation. These medications don’t automatically produce an erection. Instead they allow an erection to occur after physical and psychological stimulation.

Viagra, Levitra, and Cialis vary in dosage, duration of effectiveness and possible side effects. All three drugs are generally well tolerated. They are a good choice for men at any age and in any ethnic group who are in good health and who do not have conditions that preclude taking it (such as the use of nitrates or alpha-blockers). The success rates of all three drugs vary between 70% and 90%.
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By Yury Bayarski, Source: on-line-tribune-health.blogspot.com