Levaquin (levofloxacin) can be used by patients diagnosed with chronic bronchitis, prostate infections, urinary tract infections, kidney infections, skin infections, or pneumonia that need medical help as their bodies are unable to cope with the infection on their own. Make sure you let your doctor know if you have any allergies - especially to the active ingredient of Levaquin, as well as any other medications from that class. If you have personal or family history of Long QT, kidney or liver disease, myasthenia gravis, diabetes, seizures or epilepsy, low levels of potassium in the blood, or joint problems, taking Levaquin may not be safe for you, or you will need a dose adjustment. The following side effects of Levaquin are common and do not need to be reported to your health care provider: feeling restless, dizziness, nausea, diarrhea, muscle pain, headache, sleep problems, constipation, and vaginal itching. The cases when patients using Levaquin got more serious side effects are quite rare, but you still need to know about the possibility. The following serious side effects are sometimes experienced: dizziness, skin rash or blisters, muscle pain, unusual bruising or bleeding, seizures, hallucinations, confusion, fainting, severe diarrhea, anxiety, pale stools, itching, and chest pain.