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Viagra for alleviation of pulmonary hypertension?

Results of a preliminary study in this week's issue of THE LANCET suggest that Viagra may have a future role in the treatment of pulmonary hypertension (increased blood pressure in the pulmonary artery), a severe and potentially fatal condition causing respiratory impairment.

Lung fibrosis (scarring of the lungs due to inflammation of the alveoli) can be complicated by pulmonary hypertension. Hossein Ardeschir Ghofrani and colleagues from University Hospital, Giessen, Germany, did a preliminary randomised controlled trial to compare the acute effects of oral sildenafil (Viagra) or intravenous epoprostenol (conventional treatment) after the inhalation of nitric oxide in 16 individuals with pulmonary hypertension secondary to lung fibrosis.

A reduction in the ratio of pulmonary to systemic blood resistance--an indication of reduced pulmonary hypertension--was only observed in patients who received sildenafil.

Hossein Ghofrani comments: "Controlled randomised trials should be done to confirm our findings. However, the unique profile of sildenafil, not previously shown for a systemically administered agent, suggests that the drug is a promising candidate for long-term treatment of secondary pulmonary hypertension in lung fibrosis."

In an accompanying Commentary (p 886), Raed A Dweik from the Cleveland Clinic Foundation, USA, states that "the study by Ghofrani and colleagues adds to growing evidence for the use of sildenafil...in patients with primary and secondary pulmonary hypertension", and that sildenafil "is the best available orally administered selective pulmonary vasodilator".


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Contact: Richard Lane
richard.lane@lancet.com
44-207-424-4949
Lancet
19-Sep-2002


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