Absorption, Distribution and Excretion
The area under the curve (AUC) of ceftolozane-tazobactam after an injected dose of 1 g/0.5 g every 8 hours for 1 day was 172 mcg•h/mL. The Cmax (peak concentration) and AUC are dose-dependent. The Cmax on day one of the above dose of ceftolozane-tazobactam was 69.1 mcg/mL.
Ceftolozane is mainly excreted in the urine.
13.5 L. Tissue distribution of ceftalozone-tazobactam is rapid and shows good penetration into the lung, rendering it an ideal treatment for bacterial pneumonia.
The renal clearance of was measured to be 3.41 – 6.69 L/h after a single dose of ceftolozane-tazobactam. Dose adjustments of this drug are required in patients with impaired renal function with a creatinine clearance of 50 mL/min or below. Consult official labeling for dosing adjustment guidelines.

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Metabolism / Metabolites
Certolozane is not metabolized to any significant extent. The beta-lactam ring of tazobactam, when administered as ceftolozane-tazobactam, is hydrolyzed to form an inactive metabolite.

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Biological Half-Life
2.77 hours on day 1 of treatment on a dose of 1 g/0.5 g every 8 hours. 3.12 hours on day 10 of treatment on a dose of 1 g/0.5 g every 8 hours.

Protein Binding
16% to 21% bound to plasma proteins.

[1] Infections Caused by Resistant Gram-Negative Bacteria: Epidemiology and Management. Pharmacotherapy. 2015 Oct;35(10):949-62.

[2] Ceftolozane/tazobactam for the treatment of complicated intra-abdominal infections. Expert Opin Pharmacother. 2015 Feb;16(2):271-80

Ceftolozane is a semi-synthetic broad-spectrum fifth generation cephalosporin. It was approved by the FDA in 2014 for use in combination with [Tazobactam] for the treatment of serious infections, such as intra-abdominal infections and complicated urinary tract infections. The manufacturer of this drug is Cubist Pharmaceuticals. Most recently, in June 2019, ceftolozane-tazobactam was approved for the treatment of hospital-acquired bacterial pneumonia and ventilator-associated bacterial pneumonia. Hospital-acquired pneumonia and ventilator-associated pneumonia are major causes of morbidity and mortality in hospitalized patients and the use of ceftolozane-tazobactam offers effective activity against various organisms causing these infections, such as Pseudomonas aeruginosa.
Ceftolozane is a semi-synthetic, broad-spectrum, fifth-generation cephalosporin antibiotic with bactericidal activity against certain Gram-negative and Gram-positive bacteria. Upon administration, ceftolozane binds to and inactivates penicillin-binding proteins (PBPs) located on the inner membrane of the bacterial cell wall. This interferes with the final transpeptidation step required to form peptidoglycan chain cross-links, which are a key component of and provide strength and rigidity to the bacterial cell wall. This inhibits bacterial cell wall synthesis and reduces cell wall stability, which weakens the bacterial cell wall and causes bacterial cell lysis.
See also: Ceftolozane (annotation moved to).

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Drug Indication
Ceftolozane is used in combination with [tazobactam] for the treatment of infections caused by designated susceptible microorganisms in adult and pediatric patients: - Complicated Intra-abdominal Infections (cIAI), used in combination with [metronidazole] - Complicated Urinary Tract Infections (cUTI), including pyelonephritis - Hospital-acquired Bacterial Pneumonia and Ventilator-associated Bacterial Pneumonia (HABP/VABP)

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Mechanism of Action
Ceftolozane belongs to the cephalosporin class of antibacterial drugs. Ceftolozane exerts antibacterial effects, preventing the formation of cell walls that protect bacteria from injury and confer resistance to some antibiotics. Its antibacterial activity is also mediated through ceftolozane binding to penicillin-binding proteins (PBPs), which are required for peptidoglycan cross-linking for bacterial cell wall synthesis. As a result of cell wall synthesis inhibition, bacterial cells are killed, treating various infections. Ceftolozane has a particularly high affinity to the penicillin-binding proteins for Pseudomonas aeruginosa and Escherichia coli as well as Klebsiella pneumoniae and other enteric bacteria. In particular, a high affinity has been seen in vitro for penicillin-binding proteins 1b, 1c, 2, and 3 when compared to other antibiotics, ceftazidime and imipenem.

C23H32N12O12S3

764.7684

764.142

936111-69-2

689293-68-3;936111-69-2 (sulfate);

52918380

Typically exists as solid at room temperature

9

20

12

50

1360

2

CC(C)(C(=O)O)O/N=C(/C1=NSC(=N1)N)\C(=O)N[C@H]2[C@@H]3N(C2=O)C(=C(CS3)C[N+]4=CC(=C(N4C)N)NC(=O)NCCN)C(=O)O.OS(=O)(=O)[O-]

UJDQGRLTPBVSFN-TVNHLQOTSA-M

InChI=1S/C23H30N12O8S2.H2O4S/c1-23(2,20(40)41)43-31-11(15-30-21(26)45-32-15)16(36)29-12-17(37)35-13(19(38)39)9(8-44-18(12)35)6-34-7-10(14(25)33(34)3)28-22(42)27-5-4-241-5(2,3)4/h7,12,18,25H,4-6,8,24H2,1-3H3,(H7,26,27,28,29,30,32,36,38,39,40,41,42)(H2,1,2,3,4)/p-1/b31-11-/t12-,18-/m1./s1

mono(5-amino-2-(((6R,7R)-7-((Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(((2-carboxypropan-2-yl)oxy)imino)acetamido)-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl)methyl)-4-(3-(2-aminoethyl)ureido)-1-methyl-1H-pyrazol-2-ium) monosulfate

FR-264205 CXA101FR-264205FR264205CXA-101 Zerbaxa FR264205 FR 264205 Ceftolozane sulfate

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

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Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).

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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)

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Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).

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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders

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Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

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 (Please use freshly prepared in vivo formulations for optimal results.)