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To assess the long term therapeutic effectiveness, safety, and tolerability of low daily doses of isosmotic PEG electrolyte solutions (PMF-100) administered for a six month period for the treatment of functional constipation, in a double blind, placebo controlled, parallel group study.

After an initial four week run in period with PMF-100 (250 ml twice daily; PEG 14.6 g twice daily), 70 patients suffering from chronic constipation (58 females, aged 42 (15) years) with normalised bowel frequency (>3 bowel movements (bm)/week) were randomly allocated to receive either PMF-100 or placebo, contained in sachets (one sachet in 250 ml of water twice daily) for 20 weeks. Patients were assessed at four week intervals, and reported frequency and modality of evacuation, laxative use, and relevant symptoms on a diary card. At weeks 1, 12, and 24, a physical examination and laboratory tests were performed …