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Pomeranz HD, Smith KH, Hart WM Jr, Egan Kundzicz herbal viagra "Sildenafil-associated nonarteritic anterior ischemic optic neuropathy. " Ophthalmology 109 (2002): 584-7. Jagle H, Jagle C, Serey L, et al. "Visual short-term effects of viagra: double-blind study in healthy young subjects. " Am J Pyoktanin rezeptfrei viagra 137 (2004): 842-9.

But when the volunteers were given sildenafil before breathing in the low oxygen, the pressure in the pulmonary arteries remained almost normal. Scientists believe the drug, which has helped millions of men worldwide overcome impotence, works by helping the blood vessels in the lungs to relax and prevent the constriction which causes hypoxia and sometimes pulmonary hypertension. The drug has also been shown to work in laboratory conditions on mice born with a genetic predisposition to the condition. Lead researcher Professor Martin Wilkins said: "This is an important observation, buy viagra jelly online uk, coupled with isolated case reports, suggests that sildenafil may be a useful treatment for pulmonary hypertension. "It must be stressed, however, that controlled studies in patients with the condition are necessary before it is used in this way. " The research was funded with a Â124,000 grant from the British Heart Foundation. Professor Sir Charles George, kundzicz herbal viagra director of the Foundation said: "Pulmonary hypertension is relatively common in people with chronic lung disorders and also for some types of heart disease.

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