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What is Viagra?

As a drug, Viagra is designed to dilate arteries. It's designed only to affect the penile artery, but if you exceed the dose or experience any of the side effects, the effect on the blood vessels is more widespread. When sold as Revatio, it targets the arteries in the chest. Viagra is the standard treatment for erectile dysfunction.

What is generic Viagra?

The name you will see when you look to buy Viagra online is sildenafil citrate. This is the more technical name the chemists used when developing the drug. Viagra is the brand name for exactly the same chemistry. The name may change but the active ingredients stay the same. The generic version costs less because you are not paying for the marketing to give you brand awareness.

What is erectile dysfunction?

Doctors define this as a consistent pattern of failure either to achieve an erection or to maintain an erection until ejaculation. Doctors will not confirm a diagnosis if you fail once or twice. The usual expectation is this problem should last for several months.

Should everyone with erectile dysfunction buy Viagra online?

There are a number of issues to consider and, in the best possible world, you would discuss them with your regular physician before self-medicating. First, Viagra can interact adversely with other drugs. For example, taking Viagra with drugs to treat high blood pressure, heart rhythm problems and so on, can result in sudden and often dangerous losses in blood pressure. If you have been diagnosed with any cardiovascular disease, or have kidney or liver disease, you must discuss the problems of incompatibility with a doctor. One of the major classes of drug to avoid is based on nitrates. This also appears in some street drugs, e.g. poppers, so if you have experimented with street or prescription drugs, you need advice before you buy Viagra online.

How do you calculate the dosage?

This depends on a number of variables starting with your age, bodyweight, and medical history. As you age, the rate at which your liver and kidneys work slows down so drugs stay in your system for longer. As a general rule, this means taking a lower dosage as you age. This becomes a necessity if you have liver or kidney disease. If you take a high dose, the risk of side effects increases if it stays in your bloodstream for a long time.

What precautions should you take?

Drinking alcohol lowers your blood pressure. If you drink too much and then add the Viagra, this can produce a sudden drop in pressure which can be unpleasant. If you have eaten a large meal, particularly one with a high fat content, it will take longer for the drug to work.

What are the main side effects?

Mostly they are mild and pass within a hour or so, e.g. headache, symptoms of the common cold and an upset stomach. If you have any more serious symptoms, treat this as a potential emergency.