Cefoxitin

Cefoxitin
Names
Trade namesMefoxin, Renoxitin, others[1]
Other namesCephoxitin cefoxitin sodium
IUPAC name
  • (6R,7S)-3-(carbamoyloxymethyl)-7-methoxy-
    8-oxo-7-[(2-thiophen-2-ylacetyl)amino]-5-thia-
    1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
Clinical data
Drug classCephamycin[2]
Main usesKidney infections, bone infections, pelvic inflammatory disease, intra abdominal infections, pneumonia, sepsis[3][4]
Side effectsAllergic reactions, pain at the site of injection, diarrhea[4]
WHO AWaReUnlinkedWikibase error: ⧼unlinkedwikibase-error-statements-entity-not-set⧽
Pregnancy
category
  • AU: B1
  • US: N (Not classified yet)
    Routes of
    use    		Intravenous
    Typical dose2 gram q 4-6 hr[3]
    External links
    AHFS/Drugs.comMonograph
    MedlinePlusa682737
    Legal
    License data
    Legal status
    • AU: S4 (Prescription only)
    • UK: POM (Prescription only)
    • US: ℞-only [5]
    Pharmacokinetics
    Metabolismminimal
    Elimination half-life41-59 min
    Excretion85% urine
    Chemical and physical data
    FormulaC16H17N3O7S2
    Molar mass427.45 g·mol−1
    3D model (JSmol)
    Melting point149 to 150 °C (300 to 302 °F) (dec.)
    SMILES
    • O=C2N1/C(=C(\CS[C@@H]1[C@]2(OC)NC(=O)Cc3sccc3)COC(=O)N)C(=O)O
    InChI
    • InChI=1S/C16H17N3O7S2/c1-25-16(18-10(20)5-9-3-2-4-27-9)13(23)19-11(12(21)22)8(6-26-15(17)24)7-28-14(16)19/h2-4,14H,5-7H2,1H3,(H2,17,24)(H,18,20)(H,21,22)/t14-,16+/m1/s1 checkY
    • Key:WZOZEZRFJCJXNZ-ZBFHGGJFSA-N checkY

    Cefoxitin, sold under the brand name Mefoxin, is an antibiotic, used to treat kidney infections, bone infections, pelvic inflammatory disease, intra abdominal infections, pneumonia, and sepsis.[3][4] It is given slowly by injection into a vein.[3]

    Common side effects include allergic reactions, pain at the site of injection, and diarrhea.[4] Other side effects may include Clostridioides difficile infection and bone marrow failure.[4][3] It is not known to be harmful in pregnancy and may be used when breastfeeding.[3] A lower dose may be needed in those with kidney problems.[4] It is a cephamycin; though often grouped with the second-generation cephalosporins.[2][4]

    Cefoxitin was discovered in 1972 and approved for medical use in the United States in 1978.[4][2] It is available as a generic medication.[6][7] In the United Kingdom, ten doses of 2 grams cost the NHS just less than £300, as of 2021.[3] This amount in the United States costs about 110 USD.[8]

    Medical uses

    Cefoxitin is sold in three major IV doses, 1g, 2g, and 10g.[9] It is usually given to adults every six to eight hours in 1g or 2g doses.[10] Cefoxitin may interfere with tests detecting urine glucose and result in a false positive.[11] As with any antibiotic, it should not be given to patients who are allergic to it.[11]

    Cefoxitin is used to treat:[12][13][14][15]

    • Skin infections, primarily due to Staphylococcus
    • Urinary tract infections
    • Bronchitis
    • Tonsillitis
    • Ear infections
    • Bacterial pneumonia
    • Sepsis
    • Bone and joint infections
    • Abdominal infections and abscesses
    • Perineum injuries
    • Pelvic inflammatory disease
    • Gonorrhea
    • Infections caused by susceptible bacteria mentioned earlier

    Cefoxitin has many other uses; it may be given prior to surgery to prevent the development of surgical wound infections,[16] and when used in third and fourth degree perineal injuries in women after giving vaginal birth, cefoxitin decreases infection rate at two and six weeks.[17] However, the earlier and more times a child is exposed to cefoxitin, as with early and multiple exposure to many antibiotics, the greater the likelihood of developing inflammatory bowel disease later in life. This may be due in part to a decreased variety of microorganisms in the digestive system.[18]

    It is also used to treat pelvic inflammatory disease, because it is a broad spectrum antibiotic. For outpatient treatment, oral antibiotics or those with less frequent dosing may be prescribed.[19] As an effective alternative to penicilin and spectinomycin, and replacement for methicillin, cefoxitin is used to treat gonorrhea in both men and women with few side effects.[20]

    Spectrum of activity

    Cefoxitin's spectrum of in vitro antimicrobial activity includes a broad range of gram-negative and gram-positive bacteria, including anaerobes. It is inactive against most strains of Pseudomonas aeruginosa and many strains of Enterobacter cloacae. Staphylococci that are resistant to methicillin and oxacillin should also be considered clinically resistant to cefoxitin even if they test susceptible by in vitro methods.[5]

    Major bacterial strains susceptible to cefoxitin include:[21]

    Major bacteria resistant to cefoxitin include:[21]

    Substitution

    In a 2005 study, Fernandes et al. determined that cefoxitin serves as an appropriate replacement for methicillin in determining if some bacteria display methicillin resistance.[22] Likewise, Funsun et al. found in a 2009 study that cefoxitin disk assays correctly identified all 60 mecA-positive Staphylococcus aureus, or MRSA isolates, to be resistant to cefoxitin.[23]

    Due, in part, to the unavailability of methicillin in the United States, cefoxitin has replaced methicillin for disk diffusion tests, which determine the sensitivity of a bacterial specimen to a given antibiotic.[24] Cefoxitin also yields more accurate results for disk diffusion tests.[24] Interpretive criteria for determining susceptibility to cefoxitin via disk diffusion are greater than or equal to 22mm resulting in a "susceptible" result for Staphylococcus aureus and greater than or equal to 25mm for coagulase-negative staphylococci to be considered susceptible.[24]

    The following are susceptibility data for several medically significant microorganisms, measured by minimum inhibitory concentration, which is an alternative, liquid medium test for susceptibility.

    • Escherichia coli: 0.2 μg/ml – 64 μg/ml
    • Haemophilus influenzae: 0.5 μg/ml – 12.5 μg/ml
    • Streptococcus pneumoniae: 0.2 μg/ml – 1 μg/ml[25]

    Resistance

    In the presence of cefoxitin, bacteria that make beta-lactamases will increase their production and secretion to cleave the beta lactam ring. As a cephamycin, cefoxitin is highly resistant to hydrolysis by some beta-lactamases, in part due to the presence of the 7-alpha-methoxy functional group (see skeletal formula above).[21][26][27][28]

    Another more efficient form of resistance to cefoxitin is provided by the mecA gene in bacteria. This gene codes for an alternative penicillin binding protein, PBP2a. This PBP has a lower binding affinity for penicillin-based antibiotics such as cefoxitin and will continue to cross-link the peptidoglycan layers of the cell wall even in the presence of the beta-lactam antibiotics. MRSA, or methicillin-resistant Staphylococcus aureus is a strain that has acquired resistance to cefoxitin via this gene.[29] For the purposes of detecting bacterial strains with the mecC gene, which like mecA codes for a different PBP, cefoxitin is more reliable than oxacillin because mecC does not correlate as strongly with oxacillin resistance.[30]

    Dosage

    The typical dose is 2 gram every 4-6 hours.[3]

    Side effects

    Side effects for cefoxitin are regarded as mild.[20] Common side effects include:

    • local tenderness or pain at the site of injection
    • skin color change, mild diarrhea
    • mild nausea
    • headache
    • loss of appetite
    • vaginal discharge and itching
    • swelling of feet or legs.[31][15][10]

    While cefoxitin has not been associated with alcohol incompatibility like other members of the second generation cephalosporins class, it has been with a higher risk of coagulopathy, a bleeding disorder.[32]

    This is not a comprehensive list and not intended to provide medical advice. If any of the previous side effects are severe, or if an allergic reaction takes place immediately contact your doctor.

    Contraindications

    A contraindication means that the drug in question should not be used under particular circumstances. For cefoxitin, this includes patients who are hypersensitive to cephalosporin antibiotics.[33][34]

    Patients with colitis, kidney disease, or liver disease are also advised not to take cefoxitin.[35] However, some drug databases will considers the diseases means for caution rather than contraindications.[36]

    Interactions

    Major

    Aside from the above-mentioned contraindications and diseases which require monitoring by a doctor, the live cholera and live typhoid vaccines are known to have a severe interaction with cefoxitin.[37][38]

    Individuals on a low sodium diet, undergoing dialysis, or who have experienced seizures, particularly following antibiotic therapy, should also consult their physician prior to taking cefoxitin.[39]

    Moderate

    Only take additional antibiotics, anticoagulants and blood thinners under doctor supervision.[38] Cefoxitin may decrease the effectiveness of hormonal birth control. This increases the risk for pregnancy and a medical consult will help determine whether backup birth control methods should be used.[40]

    Minor

    Minor drug interactions do not usually require a change in treatment. Your doctor may monitor specific events, such as bleeding, while taking cefoxitin. Two such minor interactions occur between cefoxitin and heparin[41] as well as genistein.[42]

    Mechanism of action

    Cefoxitin is a beta-lactam antibiotic which binds to penicillin binding proteins, or transpeptidases. By binding to PBPs, cefoxitin prevents the PBPs from forming the cross-linkages between the peptidoglycan layers that make up the bacterial cell wall, thereby interfering with cell wall synthesis. It is a strong beta-lactamase inducer, as are certain other antibiotics (such as imipenem). However, cefoxitin is a better substrate than imipenem for beta-lactamases.[43]

    Pharmacology

    Pharmocokinetic and pharmacodynamic data for cefoxitin are, as of 2013, considered limited and outdated. A few relatively recent studies have attempted to remedy that.

    One such study was by the Hôpitaux de Paris in collaboration with the French Ministry of Health.[44] However, while the clinical trials were completed in 2015, no study data have been published.[45] The expected results from using cefoxitin over carbapenems, another type of antibiotic with a wider bacterial spectrum, included effective treatment of E. coli produce extended spectrum beta-lactamase, less selective pressure on the GI tract which better maintains balanced flora, and a lower treatment cost.[44]

    This followed a 2012 French study on the same E. coli strain with CTX-M-15 extended release beta-lactamase.[46] Lepeule et al. determined that in mice, the ideal pharmacodynamic target of fT>MIC=33%, where MIC is the minimum inhibitory concentration, was obtained with 200 mg/kg every four hours.[47] The fT>MIC (%) was increased by 11% when the administration frequency was increased from every four hours to every three hours.[47] This implied that increasing the frequency might yield similar results in humans. The study also found no significant difference between the effectiveness of carbapenems and cefoxitin and suggested that cefoxitin can be used as an alternative treatment for CTX-M producing E. coli to carbapenems such as imipenem and ertapenem.[46]

    History

    It was made from cephamycin C in the year following its discovery, 1972. It was synthesized in order to create an antibiotic with a broader spectrum.[48]

    Groups of researchers at Merck and Lilly discovered Cephamycin C while looking at penicillin-producing bacteria. This followed their discovery of erythromycin, another antibiotic.[32] Cephamycin C was the first cephem discovered but while it was highly resistant to several beta-lactamases, as is its derivative cefoxitin, it was almost only effective against Gram negative bacteria.[32] The scientists used chemically modified the compound to give cefoxitin, so titled due to its semi-synthetic nature. This new modification broadened its spectrum to include Gram positive bacteria. More than 300 modifications were made to it and tested on the cephalosporin base with methoxy groups at the 7-alpha position. Yet only cefoxitin retained its previous effectiveness against Gram negative bacteria, developed effectiveness against Gram positive bacteria, and resisted breakdown by beta-lactamase.[49]

    Cefoxitin, and the cephamycin family as a whole, served as a branching point and impulsed the discovery of more classes of beta-lactams. This is in part due to their primary and early discovery in the broths studied.[32]

    References

    1. ↑ "Cefoxitin International". Drugs.com. 2 November 2020. Archived from the original on 1 March 2016. Retrieved 8 November 2020.
    2. 1 2 3 Levy SB (2013-11-11). The Antibiotic Paradox: How Miracle Drugs Are Destroying the Miracle. Springer. ISBN 9781489960429. Archived from the original on 2021-11-01. Retrieved 2021-07-06.
    3. 1 2 3 4 5 6 7 8 "5. Infection". British National Formulary (BNF) (82 ed.). London: BMJ Group and the Pharmaceutical Press. September 2021 – March 2022. p. 560. ISBN 978-0-85711-413-6.{{cite book}}: CS1 maint: date format (link)
    4. 1 2 3 4 5 6 7 8 "CefOXitin Monograph for Professionals". Drugs.com. Archived from the original on 19 January 2021. Retrieved 30 December 2021.
    5. 1 2 "Cefoxitin- cefoxitin sodium powder, for solution". DailyMed. 10 June 2020. Archived from the original on 18 January 2021. Retrieved 8 November 2020.
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    8. ↑ "Cefoxitin Prices, Coupons & Patient Assistance Programs". Drugs.com. Archived from the original on 15 April 2021. Retrieved 30 December 2021.
    9. ↑ "Mefoxin Drug Information, Indications & Other Medicaments". www.catalog.md. Archived from the original on 2021-11-01. Retrieved 2017-04-28.
    10. 1 2 Cunha J. "Common Side Effects of Mefoxin (Cefoxitin) Drug Center - RxList". RxList. Archived from the original on 2017-05-05. Retrieved 2017-05-02.
    11. 1 2 "Mefoxin tablet :: Generic, Side effects, Interchangeable drugs, etc." edudrugs.com. Archived from the original on 2017-02-07. Retrieved 2017-04-28.
    12. ↑ "Mefoxin Indication, Action of Mefoxin, Interactions." edudrugs.com. Retrieved 2017-04-28.{{cite web}}: CS1 maint: url-status (link)
    13. ↑ "Cefoxitin Mefoxitin 1g". Marzan Pharma Corporation. Retrieved 2017-04-28.{{cite web}}: CS1 maint: url-status (link)
    14. ↑ "Méfoxin generic. Price of méfoxin. Uses, Indications and Description". ndrugs. Archived from the original on 2021-11-01. Retrieved 2017-04-28.
    15. 1 2 "Cefoxitin (By injection) - National Library of Medicine". PubMed Health. U.S. National Library of Medicine. 1 April 2017. Retrieved 2017-04-28.
    16. ↑ Bratzler DW, Houck PM (April 2005). "Antimicrobial prophylaxis for surgery: an advisory statement from the National Surgical Infection Prevention Project". American Journal of Surgery. 189 (4): 395–404. doi:10.1016/j.amjsurg.2005.01.015. PMID 15820449.
    17. ↑ Buppasiri P, Lumbiganon P, Thinkhamrop J, Thinkhamrop B (October 2014). "Antibiotic prophylaxis for third- and fourth-degree perineal tear during vaginal birth". The Cochrane Database of Systematic Reviews (10): CD005125. doi:10.1002/14651858.CD005125.pub4. PMID 25289960. Archived from the original on 2013-08-01. Retrieved 2021-07-06.
    18. ↑ Kronman MP, Zaoutis TE, Haynes K, Feng R, Coffin SE (October 2012). "Antibiotic exposure and IBD development among children: a population-based cohort study". Pediatrics. 130 (4): e794-803. doi:10.1542/peds.2011-3886. PMC 4074626. PMID 23008454.
    19. ↑ Sexually transmitted diseases :treatment guidelines. Atlanta, GA: U.S. Department of Health and Human Services. hdl:2027/uiug.30112023431809.
    20. 1 2 Survey of research on sexually transmitted diseases /. Atlanta, Ga. 1985-01-01. hdl:2027/umn.31951000325661b.
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    36. ↑ "cefoxitin Contraindications and Cautions - Epocrates Online". online.epocrates.com. Archived from the original on 2006-11-18. Retrieved 2017-05-29.
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    38. 1 2 "Cefoxitin Vial Interactions with Other Medication". WebMD. Archived from the original on 2021-11-01. Retrieved 2017-05-29.
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    40. ↑ "Camrese and cefoxitin Drug Interactions". Drugs.com. Retrieved 2017-05-29.
    41. ↑ "Cefoxitin and heparin Drug Interactions". Drugs.com. Retrieved 2017-05-29.
    42. ↑ "Cefoxitin and cholecalciferol / genistein / zinc chelazome Drug Interactions". Drugs.com. Retrieved 2017-05-29.
    43. ↑ Phillips I, Shannon K (1993). "Importance of beta-lactamase induction". European Journal of Clinical Microbiology & Infectious Diseases. 12 Suppl 1: S19-26. doi:10.1007/bf02389873. PMID 8477758. S2CID 22945967.
    44. 1 2 "Efficacy and Pharmacokinetic/Pharmacodynamic Parameters of Cefoxitin in Women With Acute Pyelonephritis Without Severity Symptoms Due to Extended-spectrum β-lactamase Producing Escherichia Coli". ICH GCP - Clinical Trials Registry. Archived from the original on 2018-01-24. Retrieved 2017-05-29.
    45. ↑ Clinical trial number NCT01820793 for "Efficacy and Pharmacokinetic/Pharmacodynamic Parameters of Cefoxitin in Women With Acute Pyelonephritis Without Severity Symptoms Due to Extended-spectrum β-lactamase Producing Escherichia Coli" at ClinicalTrials.gov
    46. 1 2 Lepeule R, Ruppé E, Le P, Massias L, Chau F, Nucci A, et al. (March 2012). "Cefoxitin as an alternative to carbapenems in a murine model of urinary tract infection due to Escherichia coli harboring CTX-M-15-type extended-spectrum β-lactamase". Antimicrobial Agents and Chemotherapy. 56 (3): 1376–81. doi:10.1128/AAC.06233-11. PMC 3294923. PMID 22214774.
    47. 1 2 Lepeule R, Ruppé E, Le P, Massias L, Chau F, Nucci A, et al. (March 2012). "Cefoxitin as an alternative to carbapenems in a murine model of urinary tract infection due to Escherichia coli harboring CTX-M-15-type extended-spectrum β-lactamase". Antimicrobial Agents and Chemotherapy. 56 (3): 1376–81. doi:10.1128/AAC.06233-11. PMC 3294923. PMID 22214774.
    48. ↑ Gootz TD (January 1990). "Discovery and development of new antimicrobial agents". Clinical Microbiology Reviews. 3 (1): 13–31. doi:10.1128/cmr.3.1.13. PMC 358138. PMID 2404566.
    49. ↑ Sneader W (2005-06-23). Drug Discovery: A History. John Wiley & Sons. ISBN 9780471899792. Archived from the original on 2021-11-01. Retrieved 2021-07-06.
    Identifiers:
    • "Cefoxitin". Drug Information Portal. U.S. National Library of Medicine. Archived from the original on 2021-05-22. Retrieved 2021-07-06.
    • "Cefoxitin sodium". Drug Information Portal. U.S. National Library of Medicine. Archived from the original on 2021-11-01. Retrieved 2021-07-06.
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