The A-Z of Viagra

So much has been said about Viagra being a treatment of choice for erectile dysfunction, but how much do we know about this drug? For instance, is our knowledge of this drug restricted to only the fact that it will work only when a man is stimulated sexually. Or that the drug is available on prescription by qualified medical personnel, in spite of the fact that a host of internet sites now offer to sell the drug to those people who want to buy Viagra online with no prescription?

Whatever the case, however, if you want to buy Viagra cheap online, it helps to learn more about the drug so that we can better understand the implications of our action. Before we learn about Viagra, it is pertinent to understand what is meant by ED.

A man is said to have ED when he cannot achieve or sustain a rigid erection. It is on record that one out of every ten men is suffering from one degree of ED or the other. According to physicians, about 90 percent cases of ED have an underlying medical cause, most of which is treatable by therapy.

How does Viagra work for ED?
Sildenafil citrate or Viagra, as it is widely known, as a potent ED treatment, works by increasing the rate of blood flow to the penis. A potent inhibitor of phosphodiesterase type 5 (PDE 5), sildenafil is effective in releasing nitric oxide (NO) in the corpus cavernosum of the penile muscles. The PDE 5, a chemical that is mostly concentrated in the penis, when inactivated allows for the enzymes produced during sex to last longer and erection.

When is the best time to take real Viagra tablets?
The best time to take Viagra is when the stomach is empty, or one hour before sexual intercourse. Also, taking Viagra after a meal rich in fatty nutrients would reduce the efficacy of the drug, because high-fat meals reduce the absorption rate of the drug. The drug, as mentioned earlier, only works when a man is sexually stimulated, and should be taken according to the recommended dose once daily.
If a man, however, takes the drug without engaging in any sexual intercourse, the drug would be naturally eliminated from the body without any side effects within a 6 to 10 hour span.

What is the success rate of the drug?
The drug has been known to achieve between 60 to 70 percent success in producing rock-hard erection in men who use it. However, the drug would not work well for men who have ED caused by prostrate surgery and diabetes, in which cases there might have been a compromise of the vascular and nerve systems. In some cases, the drug may produce partial erection with stiffness that is not acceptable. Furthermore, there are men who the drug does not work for at all, and the drug is not recommended for any man who is taking blood pressure medications.
The following listed physical or medical conditions are contraindicated for Viagra.
• Recent stroke, low blood pressure or heart attack.
• Stomach ulcers or bleeding disorders or.
• Certain rare inherited eye defects like retinitis pigmentosa.
• Severe liver or heart problems.

In addition, Viagra can react with some prescription and over-the-counter drug. The advantages of the drug include convenience of use, minor side effects and the safety of administration which is dependent on stimulation before erection can actually take effect. A major disadvantage of the drug is the time it takes for the drug to act, a delay that could dampen the spontaneity of the romance. Other disadvantages include facial flushing, headache, indigestion, etc.