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Viagra prescription: Erectile dysfunction (impotence). This medicine is prescribed when a male cannot get, or keep, a hard erect penis suitable for sexual activity. Viagra, a phosphodiesterase type-5 inhibitor, works by relaxing the blood vessels and allowing blood to flow into the penis when sexually excited, thus allowing you to obtain an erection in a natural way. Viagra will only work if you are sexually excited. Viagra use: Viagra is approved for the treatment of men who have difficulty having and maintaining an erection (impotence). The safety and effectiveness of Viagra when used with other treatment for impotence has not been studied. The use of such treatments in combination with Viagra is not recommended at present. Viagra search words: Viagra prescription, Viagra buy online, cheap Viagra, Viagra without rx, Viagra free rx, symptoms of Viagra addiction withdrawal, Viagra overnight shipping, effects of Viagra overdose, online pharmacies that sell Viagra, purchase Viagra overnight. Type of medicine Phosphodiesterase type-5 inhibitor Used for Erectile dysfunction Pulmonary arterial hypertension (high blood pressure in the pulmonary artery) Also called Viagra Revatio Available as Tablets Viagra can be used to treat erectile dysfunction. Erectile dysfunction is the inability to achieve or maintain an erection long enough to perform sexual intercourse. Viagra relaxes the blood vessels in the penis, allowing more blood to enter to achieve an erection. Viagra can also be used in pulmonary arterial hypertension. Pulmonary arterial hypertension is high blood pressure in the blood vessel between the heart and the lungs. Viagra relaxes the artery which reduces the blood pressure. Why is this drug prescribed?Viagra tablets contain the active ingredient sildenafil, which is a drug used in the treatment of erectile dysfunction. Sildenafil is called a phosphodiesterase type 5 inhibitor, and works by preventing the action of a chemical in the body called phosphodiesterase type 5. An erection is produced via a complex chain of events, involving signals from the nervous system and the release of chemical messengers within the tissues of the penis. One of these chemical messengers is called cyclic GMP. Cyclic GMP causes the blood vessels in the penis to widen by relaxing a thin layer of muscle found in the blood vessel walls. This allows more blood to enter the penis, which ultimately results in the penis becoming rigid and erect. Cyclic GMP is normally broken down by another chemical in the body called phosphodiesterase type 5. Sildenafil works by preventing the action of phosphodiesterase type 5, thus stopping the breakdown of cyclic GMP. This means that the blood vessels are kept dilated for longer, improving blood flow to the penis and maintaining an erection. As sildenafil enhances the actions of the chemical messengers responsible for producing an erection, it will only work once these messengers are present. This means that sexual stimulation is required for it to produce and maintain an erection. The dose should be taken approximately one hour before intended intercourse.Treatments* ImpotenceWhat side effects can this drug cause?* Headache * Flushing * Dizziness * Visual disturbances, such as blurred vision, blue tinge to vision * Nasal congestion * Awareness of your heart beat * Indigestion * Eye pain * Red eyes * Abnormal heart beats * Low blood pressure * High blood pressure * Fainting * Nosebleeds * Rash * Persistent painful erection of the penis * Chest pain * Bleeding into the tissue of the brain * Sudden loss of brain function with full recovery within 24 hours |
