Levofloxacin (brand name, Levaquin) is a type of fluoroquinolone antibiotic with a broad spectrum of action. It may be used either orally or parenterally. In implant dentistry it is most often used for severe infections, especially in the maxillary sinus. Levofloxacin is effective in the treatment of bacterial infections that are caused by several different types of bacteria including Escherichia coli, Campylobacter jejuni, Yersenia pestis, and Bacillus anthracis among others. This antibiotic is an effective choice against bacteria as it prevents the reproduction or repair of their genetic material. This prevents bacteria from undergoing binary fission and reproducing new bacterium. Levofloxacin is a powerful antibiotic and therefore comes with possible side effects. Among the most common are nausea, vomiting, diarrhea, and constipation. However, more serious side effects such as tendonitis, tendon rupture, and muscle weakness are also possible. The dosage of levofloxacin will depend upon the age and weight of the patient as well as the type of bacteria being targeted.