Levofloxacin is an antibiotic used to treat a variety of bacterial infections. This medication belongs to the quinolone antibiotics drug class. It works by preventing bacterial growth. It is also used to treat urinary tract, nose, throat, skin, and lung infections. It treats the illness by preventing the development of harmful germs. This medicine usually makes you feel better quite quickly. Levofloxacin tablets are available in multiple dosages of 250mg, 500mg, and 750mg. Some of the mild side effects include headache, dizziness, nausea, constipation, and diarrhea. Most side effects do not require any medical attention and disappear as your body adjusts to the medicine.