High and low dosages of a popular antibiotic are equally good at combating Clostridium difficile infections, according to a new study.

People treated with either low or high dosages of vancomycin saw about equal improvement. Those treated with a low dose of the antibiotic, or 125 mg every six hours, had a 93% clinical improvement rate at the end of therapy or at their time of hospital discharge. Those treated with a high dose, or more than 125 mg every six hours, had a 95% rate of improvement.