Vancomycin and Pseudomembranous Colitis.

Vancomycin is administered in the treatment of pseudomembranous colitis caused by other antibiotics, despite being an antibiotic itself.

This is because vancomycin is not absorbed orally. Vancomycin is an antibiotic that is administered intravenously because it is not absorbed orally. However, in the case of pseudomembranous colitis, we need a local effect, and that's when it is used topically.