Dandelion also should be avoided during antibiotic treatment, especially treatment with ciprofloxacin (Cipro), ofloxacin (Floxin), lomefloxacin (Maxaquin), norfloxacin (Noroxin), and enoxacin (Penetrex), since it may keep concentrations of these antibiotics from peaking in the bloodstream, diminishing their ability to fight infection. Read more about dandelion. From Prescription for Herbal Healing by Phyllis Balch, Copyright © January, 2002, Avery Books, a member of Penguin Putnam, Inc., used by permission.