Levoxin

The usual dose of Levofloxacin Tablets is 250 mg or 500 mg or 750 mg administered orally every 24 hours. Levofloxacin tablets can be administered without regard to food. Levofloxacin oral solution should be taken 1 hour before, or  2 hours after eating.

Levofloxacin injection should only be administered by intravenous infusion. It is not for intramuscular, intrathecal, intraperitoneal, or subcutaneous administration. The usual dose of Levofloxacin injection is 250 mg or 500 mg administered by slow infusion over 60 minutes every 24 hours or 750 mg administered by slow infusion over 90 minutes every 24 hours. Since the Levofloxacin injections are for single-use only, any unused portion should be discarded. Additives or other medications should not be added to Levofloxacin Injection or infused simultaneously through the same intravenous line.

Adults:

• Acute sinusitis: 500 mg once daily for 10-14 days, or 750 mg once daily for 5 days
• Exacerbation of chronic bronchitis: 500 mg once daily for 7 days, or 750 mg once daily for 3 days (Uncomplicated), 750 mg once daily for 5 days (Complicated)
• Community-acquired pneumonia: 500 mg once daily for 7-14 days, or 750 mg once daily for 5 days
• Uncomplicated urinary-tract infections: 250 mg once daily for 3 days
• Complicated urinary-tract infections and acute pyelonephritis: 250 mg once daily for 7-10 days
• Uncomplicated skin and soft-tissue infections: 500 mg once daily for 7-10 days.
• Complicated skin and soft-tissue infections: 750 mg once daily for 7-14 days.
• Enteric fever: 500 mg once daily for 7-14 days.
• Diarrhea, cholera, shigellosis & enteritis: Mild to moderate case: 500 mg (single dose). Moderate to sever case: 500 mg once daily for 3 days

Children:

• Children 6 months to <5 years: 10 mg/kg every 12 hours.
• Children >5 years: 10 mg/kg every 24 hours

In each case, sequential therapy (intravenous to oral) may be instituted at the discretion of the physician.

Levofloxacin is generally well tolerated. However, a few side-effects can usually be seen. There is a risk of retinal detachment. Other side-effects include: nausea, vomiting, diarrhea, abdominal pain, flatulence and rare occurrence of phototoxicity (0.1%). Side-effects that may be seen very rarely include tremors, depression, anxiety, confusion etc.

Levofloxacin exhibits a low potential for acute toxicity. However, in the events of an acute overdosage, the stomach should be emptied. The patients should be kept under observation and appropriate hydration should be maintained.

Levofloxacin is a synthetic, broad-spectrum, third generation fluoroquinolone antibiotic. Chemically, Levofloxacin is a chiral fluorinated carboxyquinolone. Levofloxacin exerts antibacterial action by inhibiting bacterial topoisomerase IV and DNA gyrase, the enzymes required for DNA replication, transcription repair and recombination. It has in vitro activity against a wide range of gm-ve and gm+ve microorganisms.

The following measures should be taken during administration of Levofloxacin:

• Levofloxacin Injection should only be administered by slow intravenous infusion over a period of 60 or 90 minutes depending on the dosage.
• While administrating Levofloxacin, adequate amount of water should be taken to avoid concentrated form of urine.
• Dose adjustment should be exercised during Levofloxacin administration in presence of renal insufficiency.

4-Quinolone preparations