Viagra (Sildenafil)

Sildenafil Citrate known under the name Viagra is applied for treatment of erectile dysfunction in men. Viagra was designed and is being marketed by the pharmaceutical Pfizer Corporation. Viagra blocks certain enzyme, such as phosphodiesterase-PDE5 in the body and helps to overcome male sexual function problems, such as impotence or erectile dysfunction, for a while. In conjunction with sexual stimulation, Sildenafil Citrate helps the blood flow into the genitals to achieve an erection sufficient for sexual activity.

Viagra is supplied in the forms of blue diamond-shaped pills with the imprinted words "Pfizer" on one side, and on the other side imprinted "VGR 25", "VGR 50" or "VGR 100", signifying the dose of an active component in milligrams.

Viagra is taken orally as needed. The dose of Sildenafil Citrate for erectile dysfunction is 25mg up to 100mg taken once a day at least 30 minutes or four hours prior to expected sexual activity, but the drug dosage is based on your health condition. One hour before sexual activity is the most effective way to feel drug action. For more details about the drug ask the doctor or pharmacist. Never exceed the recommended dose. If you suspect an overdose of Sildenafil Citrate immediately visit the doctor or emergency. Viagra dose is prescribed individually for you. Never share your prescriptions with others even if you think you have the same health condition.

Sildenafil Citrate is absorbed quite fast, and recommended to be taken on an empty stomach. Taken with food, especially with a high fat meal, or alcohol, the drug action may take longer time to be shown.

The mode of Sildenafil Citrate action is shown by releasing of nitric oxide in the cavernous tissues of the penis. Sildenafil Citrate increases the inflow of blood and relaxes the penile smooth muscle of the arteries, leading to an erection. Without sexual stimulation, Sildenafil Citrate does not cause an erection.

Read carefully all contraindications to the drug application. Avoid the medication in case if you are currently taking nitrites and nitrates, such as nitroglycerin, amyl nitrite, or sodium nitroprusside. If you are not recommended to be involved in the physical activity due to cardiovascular risk factors, you should avoid Viagra. Inform the doctor if you have a history of liver disorder, high blood pressure, or hereditary degenerative retinal disorders, or recently experienced stroke or heart attack.

Viagra may cause certain adverse reactions. Consult the doctor to make sure that you will aware on any of the following side-effects, such as dizziness, headache, fainting, hypertension, angina pectoris, blurred vision, nasal congestion, or rash.