Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. History Sildenafil compound UK, was synthesized by a group of pharmaceutical chemists led by Simon Campbell [55] working at Pfizer’s Sandwich, Kent , research facility in England. Stop taking VIAGRA and call your healthcare provider right away if you have any sudden vision loss sudden hearing decrease or hearing loss. It was initially studied for use in hypertension high blood pressure and angina pectoris a symptom of ischaemic heart disease. In some patients, the use of VIAGRA with alpha-blockers can lead to a drop in blood pressure or to fainting medicines called HIV protease inhibitors, such as ritonavir Norvir , indinavir sulfate Crixivan , saquinavir Fortovase or Invirase , or atazanavir sulfate Reyataz some types of oral antifungal medicines, such as ketoconazole Nizoral and itraconazole Sporanox some types of antibiotics, such as clarithromycin Biaxin , telithromycin Ketek , or erythromycin other medicines that treat high blood pressure other medicines or treatments for ED VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO. Teva sued to have the latter patent invalidated, but Pfizer prevailed in an August federal district court case. This development was credited largely “due to the introduction of generic products.AdFree & Private Online Consultant with Real Doctors. Reliable E.D. Meds Shipped Discreetly. Save Time & Money with Online Prescription for Viagra, Cialis, Sildenafil and TadalafilK+ visitors in the past monthFree Shipping · Real Doctors · Discreet Packaging · Personalized PlanTypes: Hair Loss · Premature Ejaculation · Sexual Health · Privacy Policy. Pfizer Viagra tablet in the trademark blue diamond shape Sexual dysfunction The primary indication of sildenafil is treatment of erectile dysfunction (inability to sustain a . AdDiscover UltraCore’s Top Male Enhancement Pill. Male UltraCore enhancement pill is scientifically proven to deliver breakthrough test1.rury Leaders · Watch Video · Fully Equipped · Custom Formulation.