Salient aspects of the drug viagra. Viagra is a Pfizer, Inc registered trademark which contains the active ingredient sildenafil citrate. It is available in 25mg, 50mg, and 100mg doses and is sold through prescription only. It's taken as an oral tablet and has proven to be one of the most successful drugs of the decade for treating Erectile Dysfunction. It is an FDA approved drug and seen as safe for human consumption. Uses of viagra.
Viagra is actively used for the treatment of male impotence and works by increasing the blood flow to the penis increasing the body's ability to maintain and achieve an erection during sexual stimulation. Viagra is strictly prohibited to: men taking nitrates such as nitroglycerin, viagra should not be used by women or children. Extreme side effects of viagra heart attacks, sudden death, irregular heart beats, stroke, chest pain, increased blood pressure. However, the side effects are not always directly related to the effect of viagra as they can be caused due to: sexual activity, patient's blood pressure, patient's heart condition, a combination of the above factors. That is why it is suggested that the patient take viagra under a doctor's prescription. Symptomatic side effects: headache, flushing, upset stomach, stuffy nose, urinary tract infection, visual changes such as mild and temporary changes in blue/green colors or increased sensitivity to light, diarrhea. Patients with the following symptoms should use viagra with care: age more than 65, liver problems, kidney problems, medications (e.g., ketoconazole, itraconazole, erythromycin and saquinavir). Such patients are recommended to take a starting dose of 25 mg Viagra. Circumstances in which the effect of Viagra is not known: Patients that have had heart attacks, strokes or have had an irregular heart rhythm especially within a 6 month period. Patients that have extreme low and high blood pressure. Prolonged erections: contact your health care provider immediately. Patients with HIV infection. Patients with certain eye disorders. | 