Double-blind randomised controlled trial of effect of metronidazole on pain after day-case haemorrhoidectomy

Lancet
E A CarapetiR K Phillips

Abstract

Haemorrhoidectomy is commonly an inpatient procedure because patients and doctors worry about postoperative pain. Day-case haemorrhoidectomy (DCH) is possible if patient anxiety is addressed and postoperative pain and bowel function are managed. Pain sometimes increases a few days after haemorrhoidectomy, possibly because of secondary infection. We studied the effect of metronidazole on pain after DCH. We randomly assigned 40 consecutive patients admitted for DCH metronidazole 400 mg (n = 20) or placebo (n = 20) three times daily, both for 7 days. All patients received lactulose from 2 days before surgery for 2 weeks. Diathermy DCH was performed without pedicle ligature or anal-canal dressing, and a diclofenac suppository was administered at the end of the procedure. Patients were discharged on the same day with diclofenac, 0.2% glyceryl-trinitrate ointment, lactulose, a telephone number to call for queries in emergencies, and an outpatient appointment. Patients took paracetamol or Co-dydramol (dihydrocodeine and paracetamol) as required; they completed linear analogue charts every day and completed questionnaires on satisfaction at 1 and 6 weeks. 34 patients had all three major piles excised, of whom seven had additional divis...Continue Reading

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