The world is making progress very fast. Scientists of modern age are trying to make those things which may help them in the future. But on the other side these things are creating problem for us. You are well familiar about the usage of car that helps to move us from one place to another but it also creates environment pollution. If there is any positive aspect of a thing then there is also a negative aspect of the same thing. Same is the case with people. In the past, they less use the technology and did their work with their own hands. But now they use machines for their work that is why they are becoming the victim of different diseases.

In these health problems erectile dysfunction is also a health problem in which a man does not get an erection at the time of sexual excitement. That is why he uses different types of medicines without the prescription of the doctor and becomes the victim of other health problems also. So it is strongly recommended to an infected person to ask the doctor before taking any medicine.

We were just talking about the erectile dysfunction. In this disease the flow of the blood through the veins of the penis decreases that is why penis does not get erection in the sexually excitement state. Viagra is the medicine use for its treatment. It is available in the market in different doses i.e. 25 mg, 50 mg and 100 mg. initially many doctors recommend to use 25 mg dose because it cannot be harmful for you as 50 mg or 100 mg can be. When you take this medicine, the flow through the blood vessels increases and the penis becomes able to get an erection. Mostly it is advised to use it 1-2 hours before sex.

Viagra has the effect of 4-5 hours but if your penis remains hard more than 4-5 hours then you should consult your doctor immediately because it can cause other problem for your health.

Well, if we talk about the causes of erectile dysfunction then you will come to know that the causes of erectile dysfunction are high blood pressure, high cholesterol level and diabetes. If we discuss about the relation of high cholesterol level with erectile dysfunction then you will come to know that with the increase in cholesterol level, a layer of cholesterol stars to build up on the walls of the vessels that decreases the flow of blood. This decrease in flow of blood becomes the cause of erectile dysfunction. If you want to use Viagra in these problems then it will be better for you because it will increase the flow of blood through vessel and your body will become normal for 3-4 hours.

Viagra should not be used if you are taking medicines for your blood pressure and diabetes because nitrates are the main component of these medicines. This nitrate can become a cause for you. So try to avoid Viagra in such conditions.