Randomized clinical trial of micronized flavonoids in the early control of bleeding from acute internal haemorrhoids

Abstract Background Patients with acute bleeding from internal haemorrhoids often have to be referred by the general practitioner to the surgeon for definitive treatment with invasive outpatient procedures. At the initial consultation, patients frequently seek postponement of immediate surgery to a more convenient time. Effective and rapid non-invasive control of acute bleeding could be of practical use in scheduling surgery to a time convenient to both patient and surgeon. Methods In a 90-day randomized, double-blind study treatment with a micronized purified flavonoid fraction (MPFF) was compared with placebo, in 100 outpatients who presented for treatment of acute internal haemorrhoids of less than 3 days' duration. The primary endpoint was cessation of bleeding on the third day of treatment. Results Of 50 patients randomized to each group, acute bleeding ceased by the third day in 40 (80 per cent) who received MPFF compared with 19 (38 per cent) who had placebo (P < 0·01). Mean(s.d.) duration of acute bleeding from onset to cessation of 4·9(1·6) days was 2·1 (95 per cent confidence interval 1·2–2·9) days less than that in patients receiving placebo (P < 0·01). Continued treatment in patients with no bleeding prevented a relapse in 30 of 47 patients, compared with 12 of 30 receiving placebo (P < 0·05). Conclusion Patients with acute internal haemorrhoids treated with MPFF had rapid cessation of bleeding and a reduced risk of relapse. This could be of value in the more convenient timing of treatment with invasive outpatient procedures.