Vaxcel Cefobactam

Uses

Cefoperazone is used for the treatment of the following infections when caused by susceptible organisms: Respiratory Tract Infections, Peritonitis & Other Intra-abdominal Infections, Bacterial Septicemia, Skin and Skin Structures Infections, Pelvic Inflammatory Disease, Endometritis & Other Infections of the Female Genital Tract, Urinary Tract Infections, Enterococcal Infections etc.

Sulbactam is an beta-lactamase inhibitor antibiotic combined with other antibiotics to treat a variety of susceptible bacterial infections.

Sulbactam is currently available in combination products with ampicillin. Within this formulation it is indicated for the treatment of infections due to susceptible strains of the designated microorganisms in the conditions listed below. Skin and Skin Structure Infections caused by beta-lactamase producing strains of Staphylococcus aureus, Escherichia coli, Klebsiella spp. (including K. pneumoniae), Proteus mirabilis, Bacteroides fragilis, Enterobacter spp., and Acinetobacter calcoaceticus. Intra-Abdominal Infections caused by beta-lactamase producing strains of Escherichia coli, Klebsiella spp. (including K. pneumoniae), Bacteroides spp. (including B. fragilis), and Enterobacter spp. Gynecological Infections caused by beta-lactamase producing strains of Escherichia coli, and Bacteroides spp. (including B. fragilis).

Vaxcel Cefobactam is also used to associated treatment for these conditions: Bacterial Infections, Bloodstream Infections, Bone and Joint Infections, Intra-Abdominal Infections, Lower Respiratory Tract Infection (LRTI), Meningitis, Peritonitis, Postoperative Infections, Skin and Soft Tissue Infections, Upper Respiratory Tract Infection, Urinary Tract Infection, Genital tract infectionAnimal bite, Bacterial Infections, Bacterial Infections caused by Beta lactamase producing bacteria, Bacterial Sinusitis, Bites, Human, Catheter Related Infections, Community Acquired Pneumonia (CAP), Gynaecological infection, Infective Endocarditis, Intra-Abdominal Infections, Nosocomial Pneumonia, Postoperative Infections, Postoperative Wound Infection, Skin and Subcutaneous Tissue Bacterial Infections, Complicated Bacterial Infections caused by Beta lactamase producing bacteria, Moderate Bacterial Infections, Severe Bacterial Infections

How Vaxcel Cefobactam works

Like all beta-lactam antibiotics, cefoperazone binds to specific penicillin-binding proteins (PBPs) located inside the bacterial cell wall, causing the inhibition of the third and last stage of bacterial cell wall synthesis. Cell lysis is then mediated by bacterial cell wall autolytic enzymes such as autolysins.

Sulbactam is an irreversible inhibitor of β-lactamase; by binding and inhibiting β-lactamase produced by bacterial cells, sulbactam is thereby able to prevent it from reducing antibiotic activity. Although sulbactam alone possesses little useful antibacterial activity, except against the Neisseriaceae, whole organism studies have shown that sulbactam restores ampicillin activity against beta-lactamase producing strains. In particular, sulbactam has good inhibitory activity against the clinically important plasmid mediated beta-lactamases most frequently responsible for transferred drug resistance. The presence of sulbactam in formulations with ampicillin effectively extends the antibacterial spectrum of ampicillin to include many bacteria normally resistant to it and to other beta-lactam antibacterials. Thus, products with ampicillin + sulbactam possess the properties of a broad-spectrum antibacterial and a beta-lactamase inhibitor.

Dosage

Vaxcel Cefobactam dosage

Sterile Cefoperazone Sodium can be administered by IM or IV injection (following dilution).

Adult: 2 to 4 grams per day administered in equally divided doses every 12 hours. In severe infections or infections caused by less sensitive organisms, the total daily dose and/or frequency may be increased. Patients have been successfully treated with a total daily dosage of 6-12 grams divided into 2,3, or 4 administrations ranging from 1.5 to 4 grams per dose. When treating infections caused by Streptococcus pyogenes, therapy should be continued for at least 10 days

Cefoperazone for intravenous or intramuscular use may be initially reconstituted with compatible solution. Solutions should be allowed to stand after reconstitution to allow any foaming to dissipate to permit visual inspection for complete solubilization. Vigorous and prolonged agitation may be necessary to solubilize Cefoperazone in higher concentrations (above 333 mg Cefoperazone/ml). The maximum solubility of Cefoperazone is approximately 475 mg Cefoperazone/ml of compatible diluent.

Side Effects

As with all Cephalosporins, hypersensitivity manifested by skin reactions (1 patient in 45), drug fever (1 in 260), or a change in Coombs' test (1 in 60) has been reported. These reactions are more likely to occur in patients with a history of allergies, particularly to Penicillin.

Toxicity

Symptoms of overdose include blood in the urine, diarrhea, nausea, upper abdominal pain, and vomiting.

Precaution

Cefoperazone is extensively excreted in bile. The serum half-life of Cefoperazone is increased 2-4 fold in patients with hepatic disease and/or biliary obstruction. In general, total daily dosage above 4 gm should not be necessary in such patients. If higher dosages are used, serum concentrations should be monitored.

Volume of Distribution

Penetration of both ampicillin and sulbactam into cerebrospinal fluid in the presence of inflamed meninges has been demonstrated after IV administration.

Elimination Route

Peak serum concentrations are reached almost immediately following a 15-minute intravenous infusion of sulbactam + ampicillin. Mean peak serum levels for sulbactam range from 48 to 88 mcg/mL following intravenous administration of 2000 mg of ampicillin plus 1000 mg sulbactam. After an intramuscular injection of 1000 mg ampicillin plus 500 mg sulbactam, peak sulbactam serum levels ranging from 6 to 24 mcg/mL are attained.

Half Life

The mean serum half-life is approximately 2.0 hours, independent of the route of administration.

~1 hr

Elimination Route

Cefoperazone is excreted mainly in the bile.

Approximately 75 to 85% of both ampicillin and sulbactam are excreted unchanged in the urine during the first 8 hours after administration.

Pregnancy & Breastfeeding use

Pregnancy Category B.This drug should be used during pregnancy only if clearly needed. Only low concentrations of Cefoperazone is excreted in human milk. Although Cefoperazone passes poorly into breast milk of nursing mothers, caution should be exercised when Cefoperazone is administered to a nursing woman.

Contraindication

Cefoperazone is contraindicated in patients with known allergy to the Cephalosporin-class of antibiotics.

Special Warning

Children use: Safety and effectiveness in children have not been established.

Geriatric use: 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.

Storage Condition

Cefoperazone is to be stored in a dry place, below 25°C and protected from light prior to reconstitution. The reconstituted solution may be stored for 24 hours if kept in room temperature (below 25°C).

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