Levofloxacin intravenous

FDA label, Gland Pharma Limited, intravenous, effective 2024-07-03. Full label on DailyMed

Other products: Levofloxacin

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Quoted from the FDA label. Product labels differ by manufacturer and change over time; confirm against the label for the product you are using.

Boxed warning

WARNING: SERIOUS ADVERSE REACTIONS INCLUDING TENDINITIS, TENDON RUPTURE, PERIPHERAL NEUROPATHY, CENTRAL NERVOUS SYSTEM EFFECTS AND EXACERBATION OF MYASTHENIA GRAVIS • Fluoroquinolones, including Levofloxacin, have been associated with disabling and potentially irreversible serious adverse reactions that have occurred together [see Warnings and Precautions (5.1) ], including: o Tendinitis and tendon rupture [see Warnings and Precautions (5.2) ] o Peripheral neuropathy [see Warnings and Precautions (5.3) ] o Central nervous system effects [see Warnings and Precautions (5.4) ] Discontinue Levofloxacin immediately and avoid the use of fluoroquinolones, including Levofloxacin, in patients who experience any of these serious adverse reactions [see Warnings and Precautions (5.1) ] • Fluoroquinolones, including Levofloxacin, may exacerbate muscle weakness in patients with myasthenia gravis. Avoid Levofloxacin in patients with a known history of myasthenia gravis [see Warnings and Precautions (5.5) ]. • Because fluoroquinolones, including Levofloxacin, have been associated with serious adverse reactions [see Warnings and Precautions (5.1 - 5.15 )], reserve levofloxacin for use in patients who have no alternative treatment options for the following indications: o Uncomplicated urinary tract infection [see Indications and Usage (1.12) ] o Acute bacterial exacerbation of chronic bronchitis [see Indications and Usage (1.13) ] o Acute bacterial sinusitis [see Indications and Usage (1.14) ]. WARNING: SERIOUS ADVERSE REACTIONS INCLUDING TENDINITIS, TENDON RUPTURE, PERIPHERAL NEUROPATHY, CENTRAL NERVOUS SYSTEM EFFECTS AND EXACERBATION OF MYASTHENIA GRAVIS See full prescribing information for complete boxed warning. Fluoroquinolones, including Levofloxacin, have been associated with disabling and potentially irreversible serious adverse reactions that have occurred together ( 5.1 ), including: o Tendinitis and tendon rupture ( 5.2 ) o Peripheral neuropathy ( 5.3 ) o Central nervous system effects ( 5.4 ) Discontinue Levofloxacin immediately and avoid the use of fluoroquinolones, including Levofloxacin injection, in patients who experience any of these serious adverse reactions ( 5.1 ) Fluoroquinolones, including Levofloxacin, may exacerbate muscle weakness in patients with myasthenia gravis. Avoid Levofloxacin in patients with a known history of myasthenia gravis [see Warnings and Precautions ( 5.5 )]. Because fluoroquinolones, including Levofloxacin, have been associated with serious adverse reactions ( 5.1 - 5.15 ), reserve Levofloxacin for use in patients who have no…

Fluoroquinolone Antibacterial

Dosing in kidney impairment

Dosage in Adult Patients with Normal Renal Function 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, 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 [see Dosage and Administration ]. Table 1: Dosage in Adult Patients with Normal Renal Function (creatinine clearance ≥ 50 mL/min) [See table below.] 10 to 14 Complicated Urinary Tract Infection (cUTI) or Acute Pyelonephritis (AP) ¶ 750 mg 5 Complicated Urinary Tract Infection (cUTI) or Acute Pyelonephritis (AP) # 250 mg 10 Uncomplicated Urinary Tract Infection 250 mg 3 Acute Bacterial Exacerbation of Chronic Bronchitis (ABECB) 500 mg 7 Acute Bacterial Sinusitis (ABS) 750 mg 5 500 mg 10 to 14 * Due to the designated pathogens [see Indications and Usage ]. † Sequential therapy (intravenous to oral) may be instituted at the discretion of the physician. ‡ Due to methicillin-susceptible Staphylococcus aureus, Streptococcus pneumoniae (including multi-drug-resistant isolates [MDRSP]), Haemophilus influenzae, Haemophilus parainfluenzae, Klebsiella pneumoniae, Moraxella catarrhalis, Chlamydophila pneumoniae, Legionella pneumophila, or Mycoplasma pneumoniae [see Indications and Usage ]. § Due to Streptococcus pneumoniae (excluding multi-drug-resistant isolates [MDRSP]), Haemophilus influenzae, Haemophilus parainfluenzae, Mycoplasma pneumoniae, or Chlamydophila pneumoniae [see Indications and Usage ]. ¶ This regimen is indicated for cUTI due to Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis and AP due to E. coli, including cases with concurrent bacteremia. # This regimen is indicated for cUTI due to Enterococcus faecalis, Enterococcus cloacae, Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Pseudomonas aeruginosa; and for AP due to E. coli. Þ Drug administration should begin as soon as possible after suspected or confirmed exposure to aerosolized B. anthracis.

This indication is based on a surrogate endpoint. Levofloxacin plasma concentrations achieved in humans are reasonably likely to predict clinical benefit [see Clinical Studies ]. ß The safety of Levofloxacin in adults for durations of therapy beyond 28 days or in pediatric patients for durations beyond 14 days has not been studied.

An increased incidence of musculoskeletal adverse events compared to controls has been observed in pediatric patients [see Warnings and Precautions , Use in Specific Populations , and Clinical Studies ] . Prolonged Levofloxacin therapy should only be used when the benefit outweighs the risk. à Drug administration should begin as soon as possible after suspected or confirmed exposure to Yersinia pestis.

Higher doses of Levofloxacin typically used for treatment of pneumonia can be used for treatment of plague, if clinically indicated.

Dosage Adjustment in Adults with Renal Impairment Administer levofloxacin injection 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 [see Use in Specific Populations ]. Table 3 shows how to adjust dose based on creatinine clearance. Table 3: Dosage Adjustment in Adult Patients with Renal Impairment (creatinine clearance <50 mL/min) [See table below.]

Dosage in Normal Renal Function Every 24 hours Creatinine Clearance 20 to 49 mL/min Creatinine Clearance 10 to 19 mL/min Hemodialysis or Chronic Ambulatory Peritoneal Dialysis (CAPD)
750 mg 750 mg every 48 hours 750 mg initial dose, then 500 mg every 48 hours 750 mg initial dose, then 500 mg every 48 hours
500 mg 500 mg initial dose, then 250 mg every 24 hours 500 mg initial dose, then 250 mg every 48 hours 500 mg initial dose, then 250 mg every 48 hours
250 mg No dosage adjustment required 250 mg every 48 hours. If treating uncomplicated UTI, then no dosage adjustment is required No information on dosing adjustment is available

Dosing in liver impairment

Hepatic Impairment Pharmacokinetic studies in hepatically impaired patients have not been conducted. Due to the limited extent of levofloxacin metabolism, the pharmacokinetics of levofloxacin are not expected to be affected by hepatic impairment.

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Preparation and administration

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Administration Instructions Levofloxacin Injection Caution: Rapid or bolus intravenous infusion of levofloxacin injection has been associated with hypotension and must be avoided. Levofloxacin Injection should be infused intravenously slowly over a period of not less than 60 or 90 minutes, depending on the dosage. Levofloxacin injection should be administered only by intravenous infusion.

It is not for intramuscular, intrathecal, intraperitoneal, or subcutaneous administration. Hydration for Patients Receiving Levofloxacin Injection Adequate hydration of patients receiving intravenous levofloxacin injection should be maintained to prevent the formation of highly concentrated urine. Crystalluria and cylindruria have been reported with quinolones [see Adverse Reactions and Patient Counseling Information ].

Preparation of Intravenous Product Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. Because only limited data are available on the compatibility of levofloxacin injection with other intravenous substances, additives or other medications should not be added to levofloxacin injection Premix in single-dose flexible containers, or infused simultaneously through the same intravenous line.

If the same intravenous line is used for sequential infusion of several different drugs, the line should be flushed before and after infusion of levofloxacin injection with an infusion solution compatible with levofloxacin injection and with any other drug(s) administered via this common line. Levofloxacin Injection Premix in Single-dose Flexible Containers (5 mg/mL) Levofloxacin Injection is supplied in flexible containers within a foil overwrap.

These contain a premixed, ready to use levofloxacin solution in 5% dextrose (D5W) for single-dose. The 100 mL premixed flexible containers contain either 250 mg/50 mL or 500 mg/100 mL of levofloxacin solution. The 150 mL flexible container contains 750 mg/150 mL of levofloxacin solution. The concentration of each container is 5 mg/mL.

No further dilution of these preparations is necessary. Because the premix flexible containers are for single-dose only, any unused portion should be discarded. Instructions for the Use of Levofloxacin Injection Premix in Flexible Containers: 1. Tear outer wrap at the notch and remove solution container. 2. Check the container for minute leaks by squeezing the inner bag firmly.

If leaks are found, or if the seal is not intact, discard the solution, as the sterility may be compromised. 3. Do not use if the solution is cloudy or a precipitate is present. 4. Use sterile equipment. 5. WARNING: Do not use flexible containers in series connections. Such use could result in air embolism due to residual air being drawn from the primary container before administration of the fluid from the secondary container is complete.

Preparation for Administration: 1. Close flow control clamp of administration set. 2. Remove cover from port at bottom of container. 3. Insert piercing pin of administration set into port with a twisting motion until the pin is firmly seated. NOTE: See full directions on administration set carton. 4. Suspend container from hanger. 5.

Squeeze and release drip chamber to establish proper fluid level in chamber during infusion of Levofloxacin Injection Premix in Flexible Containers. 6. Open flow control clamp to expel air from set. Close clamp. 7. Regulate rate of administration with flow control clamp.

Drug interactions

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  • Levofloxacin intravenous
Label text (13 paragraphs)

Interacting Drug Interaction Multivalent cation-containing products including antacids, metal cations or didanosine Do not co-administer the intravenous formulation in the same IV line with a multivalent cation, e.g., magnesium ( 2.4 , 7.1 ) Warfarin Effect may be enhanced. Monitor prothrombin time, INR, watch for bleeding ( 7.2 ) Antidiabetic agents Carefully monitor blood glucose ( 5.13 , 7.3 )

7.1 Chelation Agents: Antacids, Sucralfate, Metal Cations, Multivitamins Levofloxacin Injection There are no data concerning an interaction of intravenous fluoroquinolones with oral antacids, sucralfate, multivitamins, didanosine, or metal cations. However, no fluoroquinolone should be co-administered with any solution containing multivalent cations, e.g., magnesium, through the same intravenous line [see Dosage and Administration (2.5) ].

7.2 Warfarin No significant effect of levofloxacin on the peak plasma concentrations, 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. However, 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, International Normalized Ratio (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 [see Adverse Reactions (6.3); Patient Counseling Information (17) ].

7.3 Antidiabetic Agents Disturbances of blood glucose, including hyperglycemia and hypoglycemia, have been reported in patients treated concomitantly with fluoroquinolones and an antidiabetic agent. Therefore, careful monitoring of blood glucose is recommended when these agents are co-administered [see Warnings and Precautions (5.13) ; Adverse Reactions (6.2) , Patient Counseling Information (17) ].

7.4 Non-Steroidal Anti-Inflammatory Drugs The concomitant administration of a non-steroidal anti-inflammatory drug with a fluoroquinolone, including Levofloxacin, may increase the risk of CNS stimulation and convulsive seizures [see Warnings and Precautions (5.4) ].

7.5 Theophylline No significant effect of levofloxacin on the plasma concentrations, AUC, and other disposition parameters for theophylline was detected in a clinical study involving healthy volunteers. Similarly, no apparent effect of theophylline on levofloxacin absorption and disposition was observed. However, concomitant administration of other fluoroquinolones 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 [see Warnings and Precautions (5.4) ].

7.6 Cyclosporine No significant effect of Levofloxacin on the peak plasma concentrations, 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 fluoroquinolones. Levofloxacin C max and k e were slightly lower while T max and t ½ 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.

7.7 Digoxin No significant effect of Levofloxacin on the peak plasma concentrations, 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.

7.8 Probenecid and Cimetidine No significant effect of probenecid or cimetidine on the C max of levofloxacin was observed in a clinical study involving healthy volunteers. The AUC and t ½ of levofloxacin were higher while CL/F and CL R were lower during concomitant treatment of Levofloxacin with probenecid or cimetidine compared to Levofloxacin alone. However, these changes do not warrant dosage adjustment for Levofloxacin when probenecid or cimetidine is co-administered.

7.9 Interactions with Laboratory or Diagnostic Testing Some fluoroquinolones, including Levofloxacin, may produce false-positive urine screening results for opiates using commercially available immunoassay kits. Confirmation of positive opiate screens by more specific methods may be necessary.

Supplement interactions

Dietary supplement interactions

3 noted
  • CalciumQuinolone antibiotics
    Simultaneous use of calcium supplements and quinolone antibiotics—such as ciprofloxacin (Cipro), gemifloxacin (Factive), and moxifloxacin (Avelox)—can reduce the absorption of quinolones. Taking the antibiotic 2 hours before or 2 hours after calcium supplements prevents this effect.
    Fact sheet, updated Jun 22, 2026
  • MagnesiumAntibiotics
    Magnesium can form insoluble complexes with tetracyclines, such as demeclocycline (Declomycin) and doxycycline (Vibramycin), and with quinolone antibiotics, such as ciprofloxacin (Cipro) and levofloxacin (Levaquin). These antibiotics should be taken at least 2 hours before or 4 to 6 hours after a magnesium-containing supplement.
    Fact sheet, updated Jan 6, 2026
  • ZincAntibiotics
    Both quinolone antibiotics (such as Cipro) and tetracycline antibiotics (such as Achromycin and Sumycin) might interact with zinc in the gastrointestinal tract, which could inhibit the absorption of both zinc and the antibiotic if they are taken at the same time. Taking the antibiotic at least 2 hours before or 4 to 6 hours after the zinc supplement minimizes this interaction.
    Fact sheet, updated Jan 6, 2026

Contraindications

Levofloxacin injection is contraindicated in persons with known hypersensitivity to levofloxacin, or other quinolone antibacterials [see Warnings and Precautions (5.3) ]. Known hypersensitivity to Levofloxacin or other quinolones ( 4 , 5.7 )

Safety data

Reported adverse events (FAERS)

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Source: FDA Adverse Event Reporting System via openFDA

Liver injury (LiverTox)

A

Likelihood score A: Well established cause of clinically apparent liver injury.

Levofloxacin is a third generation fluoroquinolone that is widely used in the treatment of mild-to-moderate respiratory and urinary tract infections due to sensitive organisms. Levofloxacin has been linked to rare instances of clinically apparent hepatic injury marked by a short latency period and a hepatocellular pattern of enzyme elevations, similar to what has been described with ciprofloxacin.

ABCDEA: well known cause; E: unlikely cause. [HD]: high doses only.

Source: LiverTox: Levofloxacin (NIDDK, public domain)Chapter updated Mar 10, 2020

Pregnancy and lactation

Pregnancy

8.1 Pregnancy Pregnancy Category C. Levofloxacin was not teratogenic in rats at oral doses as high as 810 mg/kg/day which corresponds to 9.4 times the highest recommended human dose based upon relative body surface area, or at intravenous doses as high as 160 mg/kg/day corresponding to 1.9 times the highest recommended human dose based upon relative body surface area. The oral dose of 810 mg/kg/day to rats caused decreased fetal body weight and increased fetal mortality.

No teratogenicity was observed when rabbits were dosed orally as high as 50 mg/kg/day which corresponds to 1.1 times the highest recommended human dose based upon relative body surface area, or when dosed intravenously as high as 25 mg/kg/day, corresponding to 0.5 times the highest recommended human dose based upon relative body surface area. There are, however, no adequate and well-controlled studies in pregnant women. Levofloxacin should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

Lactation

8.3 Nursing Mothers Based on data on other fluoroquinolones and very limited data on Levofloxacin, it can be presumed that levofloxacin will be excreted in human milk. Because of the potential for serious adverse reactions from Levofloxacin in nursing infants, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.

Breastfeeding (LactMed)

Levofloxacin amounts in breastmilk appear to be considerably lower than the infant dose and would not be expected to cause any serious adverse effects in breastfed infants. Fluoroquinolones such as levofloxacin have traditionally not been used in infants because of concern about adverse effects on the infants' developing joints. However, more recent studies indicate little risk. The calcium in milk might prevent absorption of the small amounts of fluoroquinolones in milk, but insufficient data exist to prove or disprove this assertion. Use of levofloxacin is acceptable in nursing mothers with monitoring of the infant for possible effects on the gastrointestinal flora, such as diarrhea or candidiasis (thrush, diaper rash).

Alternatives LactMed suggests considering:
Source: LactMed: Levofloxacin (NICHD, public domain)Revised Dec 15, 2025

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