Erectile dysfunction is defined as the inability to get or maintain an erection during sexual intercourse or while sexually aroused. There are many popular and effective treatments available to help alleviate the condition, at the top Viagra. Viagra is probably the most well known medication for the treatment of erectile dysfunction as it has been used successfully for many years since its discovery and many choose to purchase Viagra on line in order to get medication discreetly.
When a man is sexually aroused or stimulated a complex series of chemical reactions result in the penile arteries dilating and the man achieves an erection. Erectile dysfunction occurs when this process of chemical reactions does not occur successfully. This can be for a number of reasons, the most common being health issues such as high blood pressure, high cholesterol or diabetes. Depression and similar psychological problems can also often result in erectile dysfunction as can drugs, both recreational and medicinal.
Viagra’s main active component is sildenafil citrate, which is a PDE5 inhibitor. Erectile dysfunction occurs due to an insufficient blood flow to the penis during sexual arousal or intercourse. This reduced blood flow is caused by the presence of one of the body’s naturally occurring enzymes, phosphodiesterase type 5, known as PDE5. PDE5 acts on the cells which line blood vessels and causes them to contract; it is what is known as a vasoconstrictor.
Erections Made Possible with PDE5 Inhibitors
Viagra is a PDE5 inhibitor which renders the PDE5 enzyme inert, meaning the penile arteries and blood vessels are able to dilate. This dilation increases blood flow to the penis, particularly to the corpa cavernosa, which are the two fleshy structures that run the length of the penis. The corpa cavernosa then become engorged with blood which stiffens the penis, giving the man an erection.
Viagra is taken at least half an hour before proposed intercourse as the drug is in pill form and taken orally. This means that the pill needs time to absorb into the bloodstream and take effect. The man must also be sexually aroused or stimulated as the PDE5 enzyme which Viagra works on is only present during arousal.
Viagra has been available on prescription for many years and is known to be a successful medication in the treatment of erectile dysfunction. Viagra (medically known as sildenafil tablets) can now be purchased online and not just through a doctor or pharmacy. Some of the top Viagra websites enable sufferers of erectile dysfunction to purchase Viagra without prescription, meaning that erectile dysfunction is now an easily treatable condition. Research should be conducted in order to find the best Viagra price on the Web.