Erectile dysfunction is the regular inability to achieve or maintain an erection. Erectile dysfunction is caused by a lack of maintained blood flow to the penis, meaning the penis is unable to become erect or stay erect, during sexual arousal or intercourse. This is a common ailment among males of all age ranges and can often be uncomfortable and embarrassing for a man at any age. There are a variety of causes of erectile dysfunction; these can range from drug side effects, health issues to psychological reasons. Ageing is also another factor which affects erectile function, men over sixty years old are four times more likely to suffer from some form of erectile dysfunction than forty year olds. Erectile dysfunction can thankfully now be treated safely using medication and a doctor will likely recommend a Viagra prescription for a man who is suffering from this condition.
Viagra is the most common form of medication used to combat erectile dysfunction. Viagra, or sildenafil citrate to give it its chemical name, enables blood to be trapped in the penis, meaning erections can be achieved and maintained. Viagra is a PDE5 inhibitor. PDE5 is a naturally occurring chemical in the human body which restricts blood flow to the muscle tissue of the penis. An erection is achieved when the muscular tissue of the penis becomes engorged with blood; PDE5 stops blood flowing into the penis so an erection cannot be achieved. Viagra inhibits the PDE5 chemical, which in turn means that vasodilation, or relaxation, can occur, which increases blood flow to the tissues of the penis, leading to an erection. Viagra is also sometimes used in the treatment of certain forms of excessively high blood pressure, due to its ability to increase vasodilation and blood flow.
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It must be noted that Viagra will not be effective if the person taking it is not sexually aroused, as the PDE5 chemicals which the drug acts on are only present during arousal. Viagra is a blue pill which is taken orally half an hour prior to intercourse. It usually takes around half an hour for Viagra to take effect and effects usually last anywhere up to four hours. It is possible to find Viagra no prescription necessary on certain websites.
Viagra prescriptions can be obtained from a doctor or physician, and these can be used to purchase Viagra from pharmacies. Men may choose to first get Viagra samples to see if the medication will be right for them. When taking Viagra there may be side effects, and it may not be compatible if a patient has pre-existing health problems or conditions or if they are taking other forms of medication.