You may opt-out of email communications at any time by clicking on the unsubscribe link in the e-mail. The patent on Revatio indicated for pulmonary arterial hypertension rather than erectile dysfunction expired in late Click here for an email preview. Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. Males between the ages of 30 and 65 would be eligible to buy four tablets after a consultation with a pharmacist. If we combine this information with your protected health information, we will treat all of that information as protected health information and will only use or disclose that information as set forth in our notice of privacy practices. It was initially studied for use in hypertension high blood pressure and angina pectoris a symptom of ischaemic heart disease.Viagra vs. sildenafil. Viagra is a brand-name medication that contains the active drug sildenafil. This active drug comes as a generic medication, too. Sildenafil and brand-name Viagra are both.  · Maximum dose: 20 mg orally three times a day. Injection: Initial dose: or 10 mg IV bolus three times a day. Comments: No greater efficacy was achieved with oral doses higher than the maximum recommended dose. A 10 mg injection dose is predicted to provide pharmacological effect equivalent to the 20 mg oral dose.  · Teva sildenafil is a generic version of Viagra that’s sold and branded by a different company. This means that it’s typically sold for much lower prices since no marketing dollars are needed.