Erectile dysfunction (ED) is a problem for millions of men, but many men are to embarrassed or do not know how to speak to their doctors about getting help. Viagra may be the solution you have been looking for if you are suffering from ED.

Viagra needs to be taken 30 to 60 minutes before a man wishes to engage in sexual activity. Viagra works by allowing a man to have a normal response to sexual stimulation. Viagra increases the blood flow into the penis and then helps the body hold it there allowing a man to maintain a normal erection. Once the sexual encounter is at an end and the stimulation has abated the erection will go away.

Remember whenever you are considering a life style change always consult a doctor. Because Viagra is a prescription medication you will need to share your medical history with a doctor to make sure Viagra is an appropriate treatment for you.

Cialis® (tadalafil) an oral medication to treat erectile dysfunction (impotence) in men has been approved by the Food and Drug Administration (FDA) and is now available for purchase in the U.S.

Cialis as compared to alternative erectile dysfunction prescription medications has shown to stay in the body longer, in upwards of 36 hours after taking Cialis when compared to placebo.

Levitra is the result of the combined effort of Bayer and GlaxoSmithKline to be able to provide an effective erectile dysfunction treatment. Like Cialis and Viagra, Levitra works in the same way by blocking the enzyme called phosphodiesterase-5 or PDE5. By blocking this enzyme the muscles in the penis can relax which allows for more blood flow and with the proper sexual stimulation can lead to an erection. The great thing about Levitra is that there have been reports that Levitra can work in as little as 12 minutes and stay in a person's system for up to 24 hours. The manufacturers believe this will lead to more spontaneous and thus more enjoyable encounters for people requiring this type of treatment.