Like all other antibiotics, cephalosporins might interfere with vitamin K levels by killing vitamin K–producing bacteria in the intestines. In addition, antibiotics in the cephalosporin family may also interfere with the way vitamin K works.
For this reason, taking extra vitamin K may be a good idea when using cephalosporins over the long term.
Shils M, et al. (eds.). Modern nutrition in health and disease, 9th ed. Baltimore: Williams and Wilkins, 1999: 1634.
Please be aware that this information is provided to supplement the care
provided by your physician. It is neither intended nor implied to be a
substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER
IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the
advice of your physician or other qualified health provider prior to
starting any new treatment or with any questions you may have regarding a