PREPARATIONS: Tablets: 250, 500 and 750 mg; Oral solution: 25 mg/mL; Injection: 500 mg/20 ml and 750 mg/30 ml; Premix ready to use injection: 250 mg/50 ml, 500 mg/100 ml, and 750 mg/150 ml.
STORAGE: Levofloxacin should be stored at 15 C to 30 C (59 F to 86 F)
DOSING: The usual dose is 250-750 mg given once daily for 3-14 days depending on the type of infection. Anthrax is treated with 500 mg daily for 60 days. It is important to take oral formulations at least 2 hours before or 2 hours after any antacid or mineral supplement containing iron, calcium, zinc, or magnesium since these bind levofloxacin and prevent its absorption into the body.
DRUG INTERACTIONS: Iron, calcium, zinc, or magnesium can attach to levofloxacin and other fluoroquinolones and prevent their absorption from the intestine into the blood. Therefore, products (for example, antacids) that contain iron, calcium, zinc or magnesium should be taken at least 2 hours before or 2 hours after levofloxacin. Other drugs that contain these minerals and can similarly interact with levofloxacin include sucralfate (Carafate) and didanosine (Videx, Videx EC).
Taking nonsteroidal anti-inflammatory drugs (NSAIDs) with levofloxacin may increase the risk of CNS stimulation, resulting in over-excitation. There have been reports of changes in blood sugar (increases and decreases) in patients treated with fluoroquinolones and antidiabetic agents. Fluoroquinolones may increase the effect of warfarin (Coumadin).
PREGNANCY AND BREASTFEEDING SAFETY: Levofloxacin is not recommended for use in pregnant women since levofloxacin causes joint and bone deformities in juvenile animals of several species.
Levofloxacin is excreted in breast milk. Mothers should decide whether to stop breastfeeding or discontinue levofloxacin.
DRUG CLASS AND MECHANISM: Levofloxacin is an antibiotic that is used for treating bacterial infections. Many common infections in humans are caused by bacteria. Bacteria can grow and multiply, infecting different parts of the body. Drugs that control and eradicate these bacteria are called antibiotics. Levofloxacin is an antibiotic that stops multiplication of bacteria by preventing the reproduction and repair of their genetic material, DNA. It is in a class of antibiotics called fluoroquinolones, a class that includes ciprofloxacin (Cipro), norfloxacin (Noroxin), ofloxacin (Floxin), trovafloxacin (Trovan), and lomefloxacin (Maxaquin). The FDA approved levofloxacin in December 1996.
Medically reviewed by Eni Williams, PharmD
Reference: FDA Prescribing Information
Quick GuideInfectious Mononucleosis Pictures Slideshow
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Need help identifying pills and medications?
Use the pill identifier tool on RxList.