Levofloxacin Dosage


Dosage of Levofloxacin in details

infoThe dose of a drug and dosage of the drug are two different terminologies. Dose is defined as the quantity or amount of medicine given by the doctor or taken by the patient at a given period. Dosage is the regimen prescribed by the doctor about how many days and how many times per day the drug is to be taken in specified dose by the patient. The dose is expressed in mg for tablets or gm, micro gm sometimes, ml for syrups or drops for kids syrups. The dose is not fixed for a drug for all conditions, and it changes according to the condition or a disease. It also changes on the age of the patient.

Dosage in Adult Patients with Normal Renal Function

The usual dose of Levofloxacin Tablets, USP is 250 mg, 500 mg, or 750 mg administered orally every 24 hours, as indicated by infection and described in Table 1.

These recommendations apply to patients with creatinine clearance ≥ 50 mL/min. For patients with creatinine clearance <50 mL/min, adjustments to the dosing regimen are required.

Dosage in Pediatric Patients

The dosage in pediatric patients ≥ 6 months of age is described below in Table 2.

Dosage Adjustment in Adults with Renal Impairment

Administer Levofloxacin Tablets, USP with caution in the presence of renal insufficiency. Careful clinical observation and appropriate laboratory studies should be performed prior to and during therapy since elimination of levofloxacin may be reduced.

No adjustment is necessary for patients with a creatinine clearance ≥ 50 mL/min.

In patients with impaired renal function (creatinine clearance <50 mL/min), adjustment of the dosage regimen is necessary to avoid the accumulation of levofloxacin due to decreased clearance.

Table 3 shows how to adjust dose based on creatinine clearance.

Drug Interaction With Chelation Agents: Antacids, Sucralfate, Metal Cations, Multivitamins

Levofloxacin Tablets

Levofloxacin Tablets, USP should be administered at least two hours before or two hours after antacids containing magnesium, aluminum, as well as sucralfate, metal cations such as iron, and multivitamin preparations with zinc or didanosine chewable/buffered tablets or the pediatric powder for oral solution.

Administration Instructions

Food and Levofloxacin Tablets, USP

Levofloxacin Tablets, USP can be administered without regard to food.

Hydration for Patients Receiving Levofloxacin Tablets, USP

Adequate hydration of patients receiving oral Levofloxacin Tablets, USP should be maintained to prevent the formation of highly concentrated urine. Crystalluria and cylindruria have been reported with quinolones.

What other drugs will affect Levofloxacin?

Tell your doctor about all medicines you use, and those you start or stop using during your treatment with levofloxacin, especially:

  • a diuretic or "water pill";

  • theophylline;

  • heart rhythm medication--amiodarone, disopyramide, dofetilide, dronedarone, procainamide, quinidine, sotalol, and others;

  • medicine to treat depression or mental illness--amitriptylline, clomipramine, desipramine, iloperidone, imipramine, nortriptyline, and others; or

  • NSAIDs (nonsteroidal anti-inflammatory drugs)--aspirin, ibuprofen (Advil, Motrin), naproxen (Aleve), celecoxib, diclofenac, indomethacin, meloxicam, and others.

This list is not complete. Other drugs may interact with levofloxacin, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.

Levofloxacin interactions

infoInteractions are the effects that happen when the drug is taken along with the food or when taken with other medications. Suppose if you are taking a drug Levofloxacin, it may have interactions with specific foods and specific medications. It will not interact with all foods and medications. The interactions vary from drug to drug. You need to be aware of interactions of the medicine you take. Most medications may interact with alcohol, tobacco, so be cautious.

There are no data concerning an interaction of quinolones IV with oral antacids, sucralfate, multivitamins, didanosine or metal cations. However, no quinolone should be co-administered with any solution containing multivalent cations eg, magnesium, through the same IV line.

Theophylline: No significant effect of levofloxacin on the plasma concentrations, AUC and other disposition parameters for theophylline was detected in a clinical study involving 14 healthy volunteers. Similarly, no apparent effect of theophylline on levofloxacin absorption and disposition was observed. However, concomitant administration of other quinolones with theophylline has resulted in prolonged elimination half-life, elevated serum theophylline levels and a subsequent increase in the risk of theophylline-related adverse reactions in the patient population. Therefore, theophylline levels should be closely monitored and appropriate dosage adjustments made when levofloxacin is co-administered. Adverse reactions, including seizures, may occur with or without an elevation in serum theophylline levels.

Warfarin: No significant effect of levofloxacin on the Cmax, AUC and other disposition parameters for R- and S-warfarin was detected in a clinical study involving healthy volunteers. Similarly, no apparent effect of warfarin on levofloxacin absorption and disposition was observed. There have been reports during the postmarketing experience in patients that levofloxacin enhances the effects of warfarin. Elevations of the prothrombin time in the setting of concurrent warfarin and levofloxacin use have been associated with episodes of bleeding. Prothrombin time, INR or other suitable anticoagulation tests should be closely monitored if levofloxacin is administered concomitantly with warfarin. Patients should also be monitored for evidence of bleeding.

Cyclosporine: No significant effect of levofloxacin on the Cmax, AUC and other disposition parameters for cyclosporine was detected in a clinical study involving healthy volunteers. However, elevated serum levels of cyclosporine have been reported in the patient population when co-administered with some other quinolones. Levofloxacin Cmax and ke were slightly lower while Tmax and t½ were slightly longer in the presence of cyclosporine than those observed in other studies without concomitant medication. The differences, however, are not considered to be clinically significant. Therefore, no dosage adjustment is required for levofloxacin or cyclosporine when administered concomitantly.

Digoxin: No significant effect of levofloxacin on the Cmax, AUC and other disposition parameters for digoxin was detected in a clinical study involving healthy volunteers. Levofloxacin absorption and disposition kinetics were similar in the presence or absence of digoxin. Therefore, no dosage adjustment for levofloxacin or digoxin is required when administered concomitantly.

Probenecid and Cimetidine: No significant effect of probenecid or cimetidine on the rate and extent of levofloxacin absorption were observed in a clinical study involving healthy volunteers. The AUC and t1/2 of levofloxacin were 27-38% and 30% higher, respectively, while CL/F and CLR were 21-35% lower during concomitant treatment with probenecid or cimetidine compared to levofloxacin alone. Although these differences were statistically significant, the changes were not high enough to warrant dosage adjustment for levofloxacin when probenecid or cimetidine is co-administered.

Nonsteroidal Anti-Inflammatory Drugs: The concomitant administration of a nonsteroidal anti-inflammatory drug with a quinolone, including levofloxacin, may increase the risk of CNS stimulation and convulsive seizures.

Antidiabetic Agents: Disturbances of blood glucose, including hyperglycemia and hypoglycemia, have been reported in patients treated concomitantly with quinolones and an antidiabetic agent. Therefore, careful monitoring of blood glucose is recommended when these agents are co-administered.



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The results of a survey conducted on ndrugs.com for Levofloxacin are given in detail below. The results of the survey conducted are based on the impressions and views of the website users and consumers taking Levofloxacin. We implore you to kindly base your medical condition or therapeutic choices on the result or test conducted by a physician or licensed medical practitioners.

User reports

2 consumers reported frequency of use

How frequently do I need to take Levofloxacin?
It was reported by ndrugs.com website users that Levofloxacin should ideally be taken Once in a day as the most common frequency of the Levofloxacin. You should you adhere strictly to the instructions and guidelines provided by your doctor on how frequently this Levofloxacin should be taken. Get another patient's view on how frequent the capsule should be used by clicking here.
Once in a day2

5 consumers reported doses

What doses of Levofloxacin drug you have used?
The drug can be in various doses. Most anti-diabetic, anti-hypertensive drugs, pain killers, or antibiotics are in different low and high doses and prescribed by the doctors depending on the severity and demand of the condition suffered by the patient. In our reports, ndrugs.com website users used these doses of Levofloxacin drug in following percentages. Very few drugs come in a fixed dose or a single dose. Common conditions, like fever, have almost the same doses, e.g., [acetaminophen, 500mg] of drug used by the patient, even though it is available in various doses.

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Information checked by Dr. Sachin Kumar, MD Pharmacology

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