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A carbapenem is a broad-spectrum beta-lactam antibiotic used to treat serious bacterial infections. Carbapenems kill susceptible bacteria by preventing proper construction of the cell wall. Examples include meropenem, imipenem with cilastatin, ertapenem, and doripenem. These medicines are commonly reserved for complicated infections or bacteria resistant to other antibiotics.
read more about carbapenem ...Carbapenems can treat selected severe abdominal, urinary tract, lung, skin, bone, joint, bloodstream, and central nervous system infections. They are particularly useful against many bacteria that produce extended-spectrum beta-lactamases or other enzymes that disable common antibiotics. The antibacterial coverage differs among individual carbapenems. Culture and susceptibility results help clinicians determine whether a carbapenem is needed and which one is appropriate.
Carbapenems bind to penicillin-binding proteins that bacteria use to build and maintain their cell walls. This blocks peptidoglycan cross-linking, weakens the wall, and causes susceptible bacteria to die. Their chemical structure protects them from breakdown by many common beta-lactamases, but not all resistance enzymes. Carbapenemase production, altered targets, reduced membrane entry, and efflux pumps can make bacteria resistant.
Carbapenems used for serious systemic infections are usually given through a vein, although administration options differ by product and location. The dose and schedule depend on the infection, kidney function, body size, and specific medicine. Some regimens use prolonged infusions to keep drug concentrations above the level needed to inhibit the bacteria. Treatment can be narrowed to a more targeted antibiotic when test results and the patient's condition allow it.
Common side effects include nausea, diarrhea, headache, rash, and reactions at the injection site. Serious risks include severe allergy, Clostridioides difficile infection, seizures, blood-cell changes, and liver or kidney test abnormalities. Carbapenems can sharply lower valproic acid levels and increase the risk of breakthrough seizures. Careful prescribing helps slow the spread of carbapenem-resistant bacteria and preserve these antibiotics for infections that need them.
Yes. Carbapenems and penicillins are separate groups within the beta-lactam antibiotic family. People with a history of a severe beta-lactam reaction need an individualized allergy assessment before treatment.
Carbapenems commonly used for serious systemic infections are generally administered by injection. Availability of specific products and formulations can differ among countries.
Carbapenems can treat many infections caused by bacteria resistant to other beta-lactam antibiotics, including selected extended-spectrum beta-lactamase-producing organisms. They do not work against bacteria that have effective carbapenem-resistance mechanisms.
They are frequently reserved for severe or multidrug-resistant infections because unnecessary use encourages resistance. Losing carbapenem effectiveness can leave clinicians with fewer and more toxic treatment options.
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Carbapenems: Past, Present, and Future. Clinical Microbiology Reviews (PubMed Central). https://pmc.ncbi.nlm.nih.gov/articles/PMC3195018/. Date Accessed August 5, 2026.
Meropenem for Injection: Prescribing Information. DailyMed. https://dailymed.nlm.nih.gov/dailymed/fda/fdaDrugXsl.cfm?setid=ca5f501c-6520-4d09-aae2-4f5db74d468f&type=display. Date Accessed August 5, 2026.
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