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| Clinical data | |
|---|---|
| Trade names | Cefzil, Cefproz, others | 
| Other names | Cefproxil | 
| AHFS/Drugs.com | Monograph | 
| MedlinePlus | a698022 | 
| License data | |
| Routes of administration | Oral | 
| ATC code | |
| Legal status | |
| Legal status | 
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| Pharmacokinetic data | |
| Bioavailability | 95% | 
| Protein binding | 36% | 
| Elimination half-life | 1.3 hours | 
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| CAS Number | |
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| Chemical and physical data | |
| Formula | C18H19N3O5S | 
| Molar mass | 389.43 g·mol−1 | 
| 3D model (JSmol) | |
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Cefprozil is a second-generation cephalosporin antibiotic. [1] Originally discovered in 1983, and approved in 1992, [2] it was sold under the tradename Cefzil by Bristol Meyers Squibb until 2010 when the brand name version was discontinued. [3] It continues to be available from various companies in its generic form. [4] It is used in the treatment of pharyngitis, tonsillitis, ear infections, acute sinusitis, bacterial exacerbation of chronic bronchitis, and skin and skin structure infections. [5] It is currently available as a tablet and as a liquid suspension.
Although there is a widely quoted cross-allergy risk of 10% between cephalosporins and penicillin, research has shown no increased risk for cross-allergy for cefprozil and several other second-generation or later cephalosporins. [6] The most common side effects were increased hepatic lab values (including AST and ALGT), dizziness, eosinophilia, diaper rash and superinfection, genital pruritus, vaginitis, diarrhea, nausea, vomiting, and abdominal pain. [5]
Currently, bacteria like Enterobacter aerogenes , Morganella morganii and Pseudomonas aeruginosa are resistant to cefprozil, while Salmonella enterica serotype Agona and streptococci are susceptible to cefprozil. Some bacteria like Brucella abortus , Moraxella catarrhalis and Streptococcus pneumoniae have developed resistance towards cefprozil in varying degrees. Detailed minimum inhibition concentration information is given by the Cefprozil Susceptibility and Resistance Data sheet. [7]
 
 Displacement of the allylic chloride in intermediate (1) with triphenylphosphine gives the phosphonium salt (2). This functionality is then converted to its ylide; condensation with acetaldehyde then leads to the vinyl derivative (3); deprotection then gives cefprozil. Semisynthetic oral cephalosporin consisting of ~90:10 Z/E isomeric mixture. [12] [13]