Viagra GUIDE

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How does Viagra work?

For a man to have an erection, the mind must first find the surrounding circumstances sexually stimulating. If anything interferes with the mind, e.g. there’s a serious level of anxiety or depression, there’s unlikely to be an erection. Assuming the libido is working properly, a chemical messenger is sent to the penis. This dilates the artery leading into the penis and, when more blood flows inside, it’s trapped there, forming the erection. If the body produces the chemical PDE5 at the wrong time, this either prevents the erection from forming or produces an unwanted deflation. Viagra prevents the premature release of PDE5 and allows a natural erection to form for as long as needed.

What are the other drugs?

There are three branded drugs available to treat erectile dysfunction as a pill. They are also available in a range of other formats. Some men find it difficult to swallow a pill. The manufacturers therefore supply the drugs in soluble form and as a cream or gel that can be rubbed into the skin. There are other drugs that can be injected into the penis. This can be a little painful and it’s somewhat inconvenient. Nevertheless, the injections are highly effective.

What are the main drug interactions to avoid?

The main classes of drug to avoid are used in the treatment of cardiovascular disease. So if you are taking any drugs for blood pressure, angina or heart problems, particularly if they contain a nitrate, do not take Viagra without your regular physician’s permission. There may also be problems if you use an antidepressant. It may be better to wait until the depression lifts before you attempt restarting your sex life. One class of antibiotics and some drugs used to combat fungal infections also interact adversely.

What are the main side effects?

The majority of men use Viagra without experiencing any adverse side effects. If you find your nose blocked, you have a headache, an upset stomach or your back hurts, these are minor symptoms and they will pass quite quickly. But if you experience an allergic reaction, or you find yourself short of breath, with pain in your chest spreading to your shoulders, this is an emergency and you should go to an ER. Similarly, you should get emergency assistance if your hearing or vision is affected or you have an erection that lasts for several hours.