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  • Title: A randomized trial of iloprost in patients with intermittent claudication.
    Author: Creager MA, Pande RL, Hiatt WR.
    Journal: Vasc Med; 2008 Feb; 13(1):5-13. PubMed ID: 18372433.
    Abstract:
    Prostanoids, which promote vasodilation and reduce platelet aggregation, have been proposed as candidate therapies for intermittent claudication due to peripheral arterial disease (PAD). However, studies of these medications have yielded inconsistent results. This study tested the hypothesis that iloprost, an oral prostacyclin analogue, would improve walking distance and quality of life in patients with intermittent claudication. The study was a multi-center, randomized, double-blind, placebo-controlled trial comparing three doses of oral iloprost (50 microg, 100 microg, or 150 microg twice daily), pentoxifylline, or placebo in 430 patients with intermittent claudication. The primary outcome measure was improvement in absolute claudication distance (ACD) after 6 months. Secondary outcomes included initial claudication distance and quality of life assessment. Placebo increased ACD by 3.3%, and iloprost increased peak ACD by 7.7%, 8.8% and 11.2% at the 50 microg, 100 microg, and 150 microg twice-daily doses, respectively (all insignificant relative to placebo). Pentoxifylline increased ACD by 13.9% relative to placebo (p = 0.039). Neither iloprost nor pentoxifylline enhanced quality of life. These results indicate that oral iloprost is not effective in improving exercise performance or quality of life in patients with PAD who have intermittent claudication.
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