Treatment of Anorectal Abscess Febrile, immunocompromised, or diabetic patients or those with marked cellulitis should also receive antibiotics (eg, ciprofloxacin 500 mg IV every 12 hours and metronidazole 500 mg IV every 8 hours, ampicillin/sulbactam 1.5 g IV every 8 hours). How do you treat a perianal abscess without surgery?Read More →