How Green Tea interacts with Fluoroquinolone Antibiotics

Interaction type: Interactions

Interaction rating: Potential/Theoritical

If the green tea product is not decaffeinated, the caffeine may alter the effects of these medications and possibly the dose needed for treatment. Use with caution. (1) (2)

These drugs include ciprofloxacin, norfloxacin, ofloxacin, levofloxacin, moxifloxacin, gatifloxacin, lomefloxacin, sparfloxacin, trovafloxacin, alatrofloxacin


  1. View Abstract: Harder S, Fuhr U, Staib AH, Wolff T. Ciprofloxacin-caffeine: a drug interaction established using in vivo and in vitro investigations. Am J Med. Nov1989;87(5A):89S-91S.
  2. View Abstract: Robson RA. The effects of quinolones on xanthine pharmacokinetics. Am J Med. Apr1992;92(4A):22S-25S.