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Nafcillin

Pronunciation

Generic Name: Nafcillin sodium
Dosage Form: injection, powder, for solution

Nafcillin for Injection, USP

SAGENT™

Rx only

To reduce the development of drug-resistant bacteria and maintain the effectiveness of Nafcillin for Injection, USP and other antibacterial drugs. Nafcillin for Injection, USP should be used only to treat or prevent infections that are proven or strongly suspected to be caused by bacteria.

DESCRIPTION

Nafcillin for Injection, USP is a semisynthetic antibiotic substance derived from 6-amino-penicillanic acid. It is the sodium salt in a parenteral dosage form. The chemical name of Nafcillin sodium is monosodium (2S,5R,6R) - 6 - (2 - ethoxy - 1 - naphthamido) - 3,3 - dimethyl - 7 - oxo - 4 - thia - 1 - azabicyclo[3.2.0]heptane - 2 - carboxylate monohydrate. It is resistant to inactivation by the enzyme penicillinase (beta-lactamase). The structural formula of Nafcillin sodium is as follows:

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Nafcillin for Injection, USP is a white to yellowish white powder filled in clear glass vials. Dilute solutions are essentially clear and colorless.

Each vial contains Nafcillin sodium as the monohydrate equivalent to 1 gram or 2 grams of Nafcillin. The sodium content is 66.2 mg [2.9 mEq] per gram Nafcillin. This product is buffered with 40 mg of sodium citrate per gram Nafcillin.

CLINICAL PHARMACOLOGY

In a study of five healthy adults administered a single 500 mg dose of Nafcillin by intravenous injection over seven minutes, the mean plasma concentration of the drug was approximately 30 mcg/mL at 5 minutes after injection. The mean area under the plasma concentration-versus-time curve (AUC) for Nafcillin in this study was 18.06 mcg·h/mL.

The serum half-life of Nafcillin administered by the intravenous route ranged from 33 to 61 minutes as measured in three separate studies.

In contrast to the other penicillinase-resistant penicillins, only about 30% of Nafcillin is excreted as unchanged drug in the urine of normal volunteers, and most within the first six hours. Nafcillin is primarily eliminated by nonrenal routes, namely hepatic inactivation and excretion in the bile.

Nafcillin binds to serum proteins, mainly albumin. The degree of protein binding reported for Nafcillin is 89.9 ± 1.5%. Reported values vary with the method of study and the investigator.

The concurrent administration of probenecid with Nafcillin increases and prolongs plasma concentrations of Nafcillin. Probenecid significantly reduces the total body clearance of Nafcillin with renal clearance being decreased to a greater extent than nonrenal clearance.

The penicillinase-resistant penicillins are widely distributed in various body fluids, including bile, pleural, amniotic and synovial fluids. With normal doses insignificant concentrations are found in the aqueous humor of the eye. High Nafcillin CSF levels have been obtained in the presence of inflamed meninges.

Renal failure does not appreciably affect the serum half-life of Nafcillin; therefore, no modification of the usual Nafcillin dosage is necessary in renal failure with or without hemodialysis. Hemodialysis does not accelerate the rate of clearance of Nafcillin from the blood.

A study which assessed the effects of cirrhosis and extrahepatic biliary obstruction in man demonstrated that the plasma clearance of Nafcillin was significantly decreased in patients with hepatic dysfunction. In these patients with cirrhosis and extrahepatic obstruction, Nafcillin excretion in the urine was significantly increased from about 30 to 50% of the administered dose, suggesting that renal disease superimposed on hepatic disease could further decrease Nafcillin clearance.

Microbiology

Penicillinase-resistant penicillins exert a bactericidal action against penicillin-susceptible microorganisms during the state of active multiplication. All penicillins inhibit the biosynthesis of the bacterial cell wall.

Nafcillin sodium has been shown to be active against most strains of the following microorganisms, both in vitro and in clinical infections as described in the INDICATIONS AND USAGE section.

Aerobic Gram-Positive Microorganisms

Staphylococcus aureus

Susceptibility Testing

Susceptibility of staphylococcal isolates to Nafcillin may be inferred by testing penicillin and either oxacillin or cefoxitin2. For staphylococcal isolates, penicillin susceptibility implies susceptibility to other β-lactams agents, and penicillin resistance implies resistance to penicillinase-labile penicillins. Resistance to oxacillin (or cefoxitin) implies resistance to all other β-lactams agents, except newer agents with activity against methicillin-resistant Staphylococcus aureus. Routine testing of Nafcillin is not advised.

Dilution Techniques

Quantitative methods are used to determine antimicrobial minimum inhibitory concentrations (MICs). These MICs provide estimates of the susceptibility of bacteria to antimicrobial compounds. The MICs should be determined using a standardized procedure based on dilution method 1,2 (broth, agar, or microdilution) or equivalent. It has been reported that determination of susceptibility or resistance of a microorganism to all penicillinase-resistant penicillins, including Nafcillin, may be deduced by testing microorganisms against either oxacillin or cefoxitin. 2 For this reason, routine dilution testing of Nafcillin is not advised and susceptibility to Nafcillin should be determined by dilution using standardized inoculum and concentrations of oxacillin according to the criteria in Table 1. 1,2

Table 1: Staphylococcus aureus MIC Susceptibility Test Interpretive Criteria for Oxacillin a
Minimum Inhibitory Oxacillin
Concentrations (mcg/mL)


Pathogen Susceptible (S) Resistant (R)
Staphylococcus aureus ≤ 2 ≥ 4

a Staphylococcus aureus strains found to be “Susceptible” or “Resistant” to oxacillin by dilution testing can be considered to be “Susceptible” or “Resistant” to Nafcillin.

Diffusion Techniques

Quantitative methods that require measurement of zone diameters also provide reproducible estimates of the susceptibility of bacteria to antimicrobial compounds. One such standardized procedure 2,3 requires the use of standardized inoculum concentrations. It has been reported that determination of susceptibility or resistance of a microorganism to all penicillinase-resistant penicillins, including Nafcillin, may be deduced by testing microorganisms against either oxacillin or cefoxitin. 2 Disk diffusion results using cefoxitin have been shown to be more reproducible than those obtained with oxacillin, 4,5 therefore cefoxitin is the preferred reagent for testing Nafcillin susceptibility by diffusion. Reports from the laboratory providing results of the standard single-disk susceptibility test with a 30 microgram cefoxitin disk should be interpreted according to the following criteria in Table 2.

Table 2: Staphylococcus aureus Disk Diffusion Susceptibility Test Interpretive Criteria for Nafcillin Using a 30 mcg Cefoxitin Disk a

a Staphylococcus aureus strains found to be “Susceptible” or “Resistant” to cefoxitin by disk diffusion can be considered to be “Susceptible” or “Resistant” to Nafcillin.

Disk Diffusion Diameters (mm)

Pathogen Susceptible (S) Resistant (R)
Staphylococcus aureus ≥ 22 ≤ 21

A report of “Susceptible” indicates that the pathogen is likely to be inhibited by usually achievable concentrations of the antimicrobial compound in blood. A report of “Resistant” indicates that usually achievable concentrations of the antimicrobial compound in the blood are unlikely to be inhibitory and that other therapy should be selected.

Measurement of MIC or MBC and achieved antimicrobial compound concentrations may be appropriate to guide therapy in some infections. (See CLINICAL PHARMACOLOGY section for further information on drug concentrations achieved in infected body sites and other pharmacokinetic properties of this antimicrobial drug product.)

Quality Control

Standardized susceptibility test procedures require the use of laboratory control microorganisms to monitor and ensure the accuracy and precision of the supplies and reagents used in the assay, and the techniques of the individuals performing the test. Appropriate quality control organisms and acceptable corresponding ranges of oxacillin MICs obtained by the dilution testing or inhibition zones around 30 mcg cefoxitin disks are provided in Table 3.

Table 3: In Vitro Susceptibility Test Quality Control Ranges for Oxacillin and Cefoxitin
Organism (ATCC #) Oxacillin
MIC range
(mcg/mL)
Cefoxitin
disk diffusion
range (mm)
Staphylococcus aureus (29213) 0.12 to 0.5 Not applicable
Staphylococcus aureus (25923) Not applicable 23 to 29

INDICATIONS AND USAGE

Nafcillin is indicated in the treatment of infections caused by penicillinase-producing staphylococci which have demonstrated susceptibility to the drug. Culture and susceptibility tests should be performed initially to determine the causative organism and its susceptibility to the drug (See CLINICAL PHARMACOLOGY – Susceptibility Testing).

Nafcillin may be used to initiate therapy in suspected cases of resistant staphylococcal infections prior to the availability of laboratory test results. The penicillinase-resistant penicillins should not be used in infections caused by organisms susceptible to penicillin G. If the susceptibility tests indicate that the infection is due to an organism other than a resistant staphylococcus, therapy should not be continued with Nafcillin.

To reduce the development of drug-resistant bacteria and maintain the effectiveness of Nafcillin for Injection, USP and other antibacterial drugs, Nafcillin for Injection, USP should be used only to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy.

CONTRAINDICATIONS

A history of a previous hypersensitivity (anaphylactic) reaction to any penicillin is a contraindication.

WARNINGS

Serious and occasionally fatal hypersensitivity (anaphylactic) reactions have been reported in patients on penicillin therapy. These reactions are more likely to occur in individuals with a history of penicillin hypersensitivity and/or a history of sensitivity to multiple allergens. There have been reports of individuals with a history of penicillin hypersensitivity who have experienced severe reactions when treated with cephalosporins. Before initiating therapy with Nafcillin, careful inquiry should be made concerning previous hypersensitivity reactions to penicillins, cephalosporins, or other allergens. If an allergic reaction occurs, Nafcillin should be discontinued and appropriate therapy instituted. Serious anaphylactic reactions require immediate emergency treatment with epinephrine. Oxygen, intravenous steroids, and airway management, including intubation, should also be administered as indicated.

Clostridium difficile associated diarrhea (CDAD) has been reported with use of nearly all antibacterial agents, including Nafcillin for Injection, USP, and may range in severity from mild diarrhea to fatal colitis. Treatment with antibacterial agents alters the normal flora of the colon leading to overgrowth of C. difficile.

C. difficile produces toxins A and B which contribute to the development of CDAD. Hypertoxin producing strains of C. difficile cause increased morbidity and mortality, as these infections can be refractory to antimicrobial therapy and may require colectomy. CDAD must be considered in all patients who present with diarrhea following antibiotic use. Careful medical history is necessary since CDAD has been reported to occur over two months after the administration of antibacterial agents.

If CDAD is suspected or confirmed, ongoing antibiotic use not directed against C. difficile may need to be discontinued. Appropriate fluid and electrolyte management, protein supplementation, antibiotic treatment of C. difficile, and surgical evaluation should be instituted as clinically indicated.

PRECAUTIONS

General

Nafcillin should generally not be administered to patients with a history of sensitivity to any penicillin.

Penicillin should be used with caution in individuals with histories of significant allergies and/or asthma. Whenever allergic reactions occur, penicillin should be withdrawn unless, in the opinion of the physician, the condition being treated is life-threatening and amenable only to penicillin therapy. The use of antibiotics may result in overgrowth of nonsusceptible organisms. If new infections due to bacteria or fungi occur, the drug should be discontinued and appropriate measures taken.

The liver/biliary tract is the primary route of Nafcillin clearance. Caution should be exercised when patients with concomitant hepatic insufficiency and renal dysfunction are treated with Nafcillin. Serum levels should be measured and the dosage adjusted appropriately to avoid possible neurotoxic reactions associated with very high concentrations (see DOSAGE AND ADMINISTRATION).

Prescribing Nafcillin for Injection, USP in the absence of a proven or strongly suspected bacterial infection or a prophylactic indication is unlikely to provide benefit to the patient and increases the risk of the development of drug-resistant bacteria.

Laboratory Tests

Bacteriologic studies to determine the causative organisms and their susceptibility to Nafcillin should be performed. (See CLINICAL PHARMACOLOGY - Microbiology.) In the treatment of suspected staphylococcal infections, therapy should be changed to another active agent if culture tests fail to demonstrate the presence of staphylococci.

Periodic assessment of organ system function including renal, hepatic, and hematopoietic should be made during prolonged therapy with Nafcillin. White blood cell and differential cell counts should be obtained prior to initiation of therapy and periodically during therapy with Nafcillin. Periodic urinalysis, blood urea nitrogen, and creatinine determinations should be performed during therapy with Nafcillin. SGOT and SGPT values should be obtained periodically during therapy to monitor for possible liver function abnormalities.

Drug Interactions

Tetracycline, a bacteriostatic antibiotic, may antagonize the bactericidal effect of penicillin, and concurrent use of these drugs should be avoided.

Nafcillin in high dosage regimens, i.e., 2 grams every 4 hours, has been reported to decrease the effects of warfarin. When Nafcillin and warfarin are used concomitantly, the prothrombin time should be closely monitored and the dose of warfarin adjusted as necessary. This effect may persist for up to 30 days after Nafcillin has been discontinued.

Nafcillin when administered concomitantly with cyclosporine has been reported to result in subtherapeutic cyclosporine levels. The Nafcillin-cyclosporine interaction was documented in a patient during two separate courses of therapy. When cyclosporine and Nafcillin are used concomitantly in organ transplant patients, the cyclosporine levels should be monitored.

Drug/Laboratory Test Interactions

Nafcillin in the urine can cause a false-positive urine reaction for protein when the sulfosalicyclic acid test is used, but not with the dipstick.

Carcinogenesis, Mutagenesis, Impairment of Fertility

No long term animal studies have been conducted with these drugs. Studies on reproduction (Nafcillin) in rats and mice reveal no fetal or maternal abnormalities before conception and continuously through weaning (one generation).

Pregnancy

Teratogenic Effects

Pregnancy Category B

Reproduction studies have been performed in the mouse with oral doses up to 20 times the human dose and orally in the rat at doses up to 40 times the human dose and have revealed no evidence of impaired fertility or harm to the rodent fetus due to Nafcillin. There are, however, no adequate or well-controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, Nafcillin should be used during pregnancy only if clearly needed.

Nursing Mothers

Penicillins are excreted in human milk. Caution should be exercised when penicillins are administered to a nursing woman.

Pediatric Use

The liver/biliary tract is the principal route of Nafcillin elimination. Because of immature hepatic and renal function in pediatric patients, Nafcillin excretion may be impaired, with abnormally high serum levels resulting. Serum levels should be monitored and the dosage adjusted appropriately. There are no approved pediatric patient dosage regimens for intravenous Nafcillin. Safety and effectiveness in pediatric patients have not been established.

Geriatric Use

Clinical studies of Nafcillin for Injection, USP did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.

Nafcillin for Injection, USP contains 66.2 mg (2.9 mEq) of sodium per gram Nafcillin and is buffered with 40 mg of sodium citrate per gram Nafcillin. At the usual recommended doses, patients would receive between 199 and 397 mg/day (8.7 and 17.4 mEq) of sodium. The geriatric population may respond with a blunted natriuresis to salt loading. This may be clinically important with regard to such diseases as congestive heart failure.

Information for Patients

Patients should be counseled that antibacterial drugs including Nafcillin for Injection, USP should only be used to treat bacterial infections. They do not treat viral infections (e.g., the common cold). When Nafcillin for Injection, USP is prescribed to treat a bacterial infection, patients should be told that although it is common to feel better early in the course of therapy, the medication should be taken exactly as directed. Skipping doses or not completing the full course of therapy may (1) decrease the effectiveness of the immediate treatment and (2) increase the likelihood that bacteria will develop resistance and will not be treatable by Nafcillin for Injection, USP or other antibacterial drugs in the future.

Diarrhea is a common problem caused by antibiotics which usually ends when the antibiotic is discontinued. Sometimes after starting treatment with antibiotics, patients can develop watery and bloody stools (with or without stomach cramps and fever) even as late as two or more months after having taken the last dose of the antibiotic. If this occurs, patients should contact their physician as soon as possible.

Adverse Reactions

Body as a Whole

The reported incidence of allergic reactions to penicillin ranges from 0.7 to 10 percent (see WARNINGS). Sensitization is usually the result of treatment, but some individuals have had immediate reactions to penicillin when first treated. In such cases, it is thought that the patients may have had prior exposure to the drug via trace amounts present in milk or vaccines. Two types of allergic reactions to penicillins are noted clinically, immediate and delayed.

Immediate reactions usually occur within 20 minutes of administration and range in severity from urticaria and pruritus to angioneurotic edema, laryngospasm, bronchospasm, hypotension, vascular collapse, and death. Such immediate anaphylactic reactions are very rare (see WARNINGS) and usually occur after parenteral therapy but have occurred in patients receiving oral therapy. Another type of immediate reaction, an accelerated reaction, may occur between 20 minutes and 48 hours after administration and may include urticaria, pruritus, and fever.

Although laryngeal edema, laryngospasm, and hypotension occasionally occur, fatality is uncommon. Delayed allergic reactions to penicillin therapy usually occur after 48 hours and sometimes as late as 2 to 4 weeks after initiation of therapy. Manifestations of this type of reaction include serum sickness-like symptoms (i.e., fever, malaise, urticaria, myalgia, arthralgia, abdominal pain) and various skin rashes. Nausea, vomiting, diarrhea, stomatitis, black or hairy tongue, and other symptoms of gastrointestinal irritation may occur, especially during oral penicillin therapy.

Local Reactions

Pain, swelling, inflammation, phlebitis, thrombophlebitis, and occasional skin sloughing at the injection site have occurred with intravenous administration of Nafcillin. (See DOSAGE AND ADMINISTRATION.) Severe tissue necrosis with sloughing secondary to subcutaneous extravasation of Nafcillin has been reported.

Nervous System Reactions

Neurotoxic reactions similar to those observed with penicillin G could occur with large intravenous or intraventricular doses of Nafcillin especially in patients with concomitant hepatic insufficiency and renal dysfunction. (See PRECAUTIONS).

Urogenital Reactions

Renal tubular damage and interstitial nephritis have been associated infrequently with the administration of Nafcillin. Manifestations of this reaction may include rash, fever, eosinophilia, hematuria, proteinuria, and renal insufficiency.

Gastrointestinal Reactions

Pseudomembranous colitis has been reported with the use of Nafcillin. The onset of pseudomembranous colitis symptoms may occur during or after antibiotic treatment (see WARNINGS).

Metabolic Reactions

Agranulocytosis, neutropenia, and bone marrow depression have been associated with the use of Nafcillin.

To report SUSPECTED ADVERSE REACTIONS, contact Sagent Pharmaceuticals, Inc. at 1-866-625-1618 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch

OVERDOSAGE

Neurotoxic reactions similar to those observed with penicillin G may arise with intravenous doses of Nafcillin especially in patients with concomitant hepatic insufficiency and renal dysfunction (see PRECAUTIONS).

In the case of overdosage, discontinue Nafcillin, treat symptomatically and institute supportive measures as required. Hemodialysis does not increase the rate of clearance of Nafcillin from the blood.

DOSAGE AND ADMINISTRATION

Nafcillin for injection is available for intramuscular and intravenous use.

The penicillinase-resistant penicillins are available for oral administration and for intramuscular and intravenous injection. The sodium salts of methicillin, oxacillin, and Nafcillin may be administered parenterally and the sodium salts of cloxacillin, dicloxacillin, oxacillin, and Nafcillin are available for oral use. The usual IV dosage for adults is 500 mg every 4 hours. For severe infections, 1 g every 4 hours is recommended. Administer slowly over at least 30 to 60 minutes to minimize the risk of vein irritation and extravasation.

RECOMMENDED DOSAGE FOR Nafcillin FOR INJECTION, USP
Drug Adults Infants and Children
<40 kg (88 lbs)
Other
Recommendations
Nafcillin 500 mg IM every
4 to 6 hours
IV every 4 hours
25 mg/kg IM
twice daily
Neonates 10 mg/kg
IM twice daily
Nafcillin 1 gram IM or IV
every 4 hours
(severe infections)

Bacteriologic studies to determine the causative organisms and their susceptibility to Nafcillin should always be performed. Duration of therapy varies with the type and severity of infection as well as the overall condition of the patient, therefore it should be determined by the clinical and bacteriological response of the patient. In severe staphylococcal infections, therapy with Nafcillin should be continued for at least 14 days. Therapy should be continued for at least 48 hours after the patient has become afebrile, asymptomatic, and cultures are negative. The treatment of endocarditis and osteomyelitis may require a longer duration of therapy.

Concurrent administration of the penicillinase-resistant penicillins and probenecid increases and prolongs serum penicillin levels. Probenecid decreased the apparent volume of distribution and slows the rate of excretion by competitively inhibiting renal tubular secretion of penicillin. Nafcillin-probenecid therapy is generally limited to those infections where very high serum levels of Nafcillin are necessary.

No dosage alterations are necessary for patients with renal dysfunction, including those on hemodialysis. Hemodialysis does not accelerate Nafcillin clearance from the blood.

For patients with hepatic insufficiency and renal failure, measurement of Nafcillin serum levels should be performed and dosage adjusted accordingly.

With intravenous administration, particularly in elderly patients, care should be taken because of the possibility of thrombophlebitis.

Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration whenever solution and container permit.

Do not add supplementary medication to Nafcillin.

Oral preparations of the penicillinase-resistant penicillins should not be used as initial therapy in serious, life-threatening infections (see PRECAUTIONS-General). Oral therapy with the penicillinase-resistant penicillins may be used to follow-up the previous use of a parenteral agent as soon as the clinical condition warrants. For intramuscular gluteal injections, care should be taken to avoid sciatic nerve injury. With intravenous administration, particularly in elderly patients, care should be taken because of the possibility of thrombophlebitis.

DIRECTIONS FOR USE

For Intramuscular Use

Reconstitute with Sterile Water for Injection, USP, 0.9% Sodium Chloride Injection, USP or Bacteriostatic Water for Injection, USP (with benzyl alcohol or parabens); add 3.4 mL to the 1 g vial for 4 mL resulting solution; 6.6 mL to the 2 g vial for 8 mL resulting solution. All reconstituted vials have a concentration of 250 mg per mL.

The clear solution should be administered by deep intragluteal injection immediately after reconstitution.

Reconstituted Stability

Reconstitute with the required amount of Sterile Water for Injection, USP, 0.9% Sodium Chloride Injection, USP or Bacteriostatic Water for Injection, USP (with benzyl alcohol or parabens). The resulting solutions are stable for 3 days at room temperature or 7 days under refrigeration and 90 days frozen.

For Direct Intravenous Use

The required amount of drug should be diluted in 15 to 30 mL of Sterile Water for Injection, USP or Sodium Chloride Injection, USP and injected over a 5- to 10- minute period. This may be accomplished through the tubing of an intravenous infusion if desirable.

For Administration by Intravenous Drip

Reconstitute as directed above prior to further dilution.

STABILITY PERIODS FOR Nafcillin FOR INJECTION, USP
Concentration mg/mL Sterile Water for Injection 0.9%
Sodium Chloride
M/6 Molar Sodium Lactate Solution 5% Dextrose
in Water
5% Dextrose in 0.45% NaCl 10% Invert Sugar Lactated Ringers Solution
ROOM TEMPERATURE (25°C)
10 to 200 24 Hrs 24 Hrs
30 24 Hrs
2 to 30 24 Hrs 24 Hrs
10 to 30 24 Hrs 24 Hrs
REFRIGERATION (4°C)
10 to 200 7 Days 7 Days
10 to 30 7 Days 7 Days 7 Days 7 Days 7 Days
FROZEN (-15°C)
250 90 Days 90 Days
10 to 250 90 Days 90 Days 90 Days 90 Days 90 Days

Only those solutions listed above should be used for the intravenous infusion of Nafcillin Sodium, USP. The concentration of the antibiotic should fall within the range specified. The drug concentration and the rate and volume of the infusion should be adjusted so that the total dose of Nafcillin is administered before the drug loses its stability in the solution in use.

There is no clinical experience available on the use of this agent in neonates or infants for this route of administration.

This route of administration should be used for relatively short-term therapy (24 to 48 hours) because of the occasional occurrence of thrombophlebitis particularly in elderly patients.

If another agent is used in conjunction with Nafcillin therapy, it should not be physically mixed with Nafcillin but should be administered separately.

HOW SUPPLIED

Nafcillin for Injection, USP (Nafcillin sodium equivalent to 1 gram or 2 grams Nafcillin per vial) is supplied as follows:

NDC Nafcillin for Injection, USP Package Factor
25021-139-10 1 gram per vial 10 vials per carton
25021-140-10 2 grams per vial 10 vials per carton

Storage Conditions

Prior to reconstitution store dry powder at 20° to 25°C (68° to 77°F). [See USP Controlled Room Temperature.]

Sterile, Nonpyrogenic, Preservative-free.
The container closure is not made with natural rubber latex.

REFERENCES

  1. Clinical and Laboratory Standards Institute. Methods for Dilution Antimicrobial Susceptibility Tests for Bacteria That Grow Aerobically; Approved Standard-Eighth Edition . CLSI Document M07-A8 (ISBN 1-56238-689-1). Clinical and Laboratory Standards Institute, 940 West Valley Road, Suite 1400, Wayne, Pennsylvania 19087-1898 USA, 2009.
  2. Clinical and Laboratory Standards Institute (CLSI). Performance Standards for Antimicrobial Susceptibility Testing; Twenty-third Informational Supplement . CLSI Document M100-S23. Clinical and Laboratory Standards Institute, 950 West Valley Road, Suite 2500, Wayne, Pennsylvania 19087, USA, 2013.
  3. Clinical and Laboratory Standards Institute. Performance Standards for Antimicrobial Disk Susceptibility Tests; Approved Standard-Tenth Edition. CLSI Document M02-A10 (ISBN 1-56238-688-3). Clinical and Laboratory Standards Institute, 940 West Valley Road, Suite 1400, Wayne, Pennsylvania 19087-1898 USA, 2009.
  4. Palazzo ICV, Darini ALC. Evaluation of methods for detecting oxacillin resistance in coagulase-negative staphylococci including cefoxitin disc diffusion. FEMS Microbiol Lett 2006;257:299-305.
  5. Swenson JM, Tenover FC; Cefoxitin Disk Study Group. Results of disk diffusion testing with cefoxitin correlate with presence of mecA in Staphylococcus spp. J Clin Microbiol 2005;43:3818-23.

SAGENT™

Mfd. for SAGENT Pharmaceuticals
Schaumburg, IL 60195 (USA)
Made in India
©2014 Sagent Pharmaceuticals, Inc.

Revised: October 2014

PACKAGE LABEL – PRINCIPAL DISPLAY PANEL – Vial Label

NDC 25021-139-10

Rx only

Nafcillin for Injection, USP

1 gram per vial

Buffered for IV or IM Use

PACKAGE LABEL – PRINCIPAL DISPLAY PANEL – Vial Label

NDC 25021-140-10

Rx only

Nafcillin for Injection, USP

2 grams per vial

Buffered for IV or IM Use

Nafcillin 
Nafcillin sodium injection, powder, for solution
Product Information
Product Type HUMAN PRESCRIPTION DRUG LABEL Item Code (Source) NDC:25021-139
Route of Administration INTRAVENOUS, INTRAMUSCULAR DEA Schedule     
Active Ingredient/Active Moiety
Ingredient Name Basis of Strength Strength
Nafcillin sodium (Nafcillin) Nafcillin 1 g  in 4 mL
Inactive Ingredients
Ingredient Name Strength
sodium citrate  
Packaging
# Item Code Package Description
1 NDC:25021-139-10 10 VIAL in 1 CARTON
1 4 mL in 1 VIAL
Marketing Information
Marketing Category Application Number or Monograph Citation Marketing Start Date Marketing End Date
ANDA ANDA090582 10/25/2012
Nafcillin 
Nafcillin sodium injection, powder, for solution
Product Information
Product Type HUMAN PRESCRIPTION DRUG LABEL Item Code (Source) NDC:25021-140
Route of Administration INTRAVENOUS, INTRAMUSCULAR DEA Schedule     
Active Ingredient/Active Moiety
Ingredient Name Basis of Strength Strength
Nafcillin sodium (Nafcillin) Nafcillin 2 g  in 8 mL
Inactive Ingredients
Ingredient Name Strength
sodium citrate  
Packaging
# Item Code Package Description
1 NDC:25021-140-10 10 VIAL in 1 CARTON
1 8 mL in 1 VIAL
Marketing Information
Marketing Category Application Number or Monograph Citation Marketing Start Date Marketing End Date
ANDA ANDA090582 10/25/2012
Labeler - Sagent Pharmaceuticals (796852890)
Revised: 10/2014
 
Sagent Pharmaceuticals
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