Common antibiotic linked to higher risk of death in adults, major study finds - Fox News
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A widely used antibiotic called cefepime has been linked to a higher risk of death in a major new study published in JAMA Network Open. Cefepime is a broad-spectrum antibiotic commonly administered by injection in hospital settings to treat serious bacterial infections, including pneumonia, urinary tract infections, skin infections, and meningitis. The drug is well established in clinical medicine, but new evidence suggests its safety profile may warrant closer scrutiny than previously assumed.
The global study reviewed 110 randomized clinical trials involving more than 22,000 patients who received either cefepime or another beta-lactam antibiotic — a class that includes penicillins and cephalosporins. Patients in the trials were being treated for a range of conditions, including febrile neutropenia, a life-threatening medical emergency characterized by fever and dangerously low white blood cell counts, as well as pneumonia, severe bacterial infections, UTIs, and meningitis.
Across all trials, 778 deaths occurred among 11,726 patients given cefepime, representing 6.6% mortality, compared to 6.2% among those given alternative antibiotics. Using a Bayesian meta-analysis — a statistical method that quantifies the probability of an association — researchers determined a 94.4% probability that cefepime is linked to higher all-cause mortality. When analysis was restricted to 73 peer-reviewed published trials, that probability rose sharply to 98.6%, a striking figure that underscores the robustness of the finding.
The association between cefepime and increased mortality was more pronounced in adult patients than in children, and was especially strong among those treated for febrile neutropenia. Researchers explored several potential explanations, including drug levels insufficient to adequately combat the infection and the possibility of neurotoxicity — a phenomenon already documented in older patients and those with impaired kidney function, for whom cefepime's known side effects include confusion, seizures, and decreased consciousness.
Despite these concerning findings, the researchers stopped short of recommending that clinicians discontinue cefepime, recognizing its value as an effective broad-spectrum antibiotic for hospitalized patients. Instead, they called for updated clinical guidance and further research to clarify the drug's safety profile. The study highlights the importance of ongoing pharmacovigilance — the continuous monitoring of drug safety — and raises broader questions about the assumed safety of antibiotics that have been in widespread use for decades.
Japanische Übersetzung
広く使用されている抗生物質「セフェピム」が、死亡リスクの上昇と関連しているとする大規模研究が、医学誌「JAMA Network Open」に掲載された。セフェピムは入院患者に注射で投与される広域スペクトル抗生物質で、肺炎・尿路感染症・髄膜炎など重篤な細菌感染症の治療に用いられる。臨床医学では確立された薬だが、その安全性が改めて問われている。
この世界規模の研究では、セフェピムまたは他のβ-ラクタム系抗生物質(ペニシリンやセファロスポリンを含む)を投与された2万2,000人以上の患者を対象とした110件の無作為化臨床試験が検証された。対象患者は発熱性好中球減少症、肺炎、重篤な細菌感染症、尿路感染症、髄膜炎などの治療を受けていた。
全試験を通じて、セフェピムを投与された1万1,726人の患者のうち778人(6.6%)が死亡し、他の抗生物質を投与された患者の死亡率6.2%を上回った。ベイズ型メタアナリシスにより、セフェピムが全死因死亡率の上昇と関連する確率は94.4%と算出された。査読済み論文73件に絞ると、この確率は98.6%へと大幅に上昇した。
セフェピムと死亡率上昇の関連は、小児より成人で顕著であり、特に発熱性好中球減少症の治療を受けた患者で強く見られた。研究者らは複数の要因を検討し、感染症を十分に制御できない血中薬物濃度の不足や神経毒性の可能性を挙げた。神経毒性は、腎機能が低下した高齢患者において混乱・けいれん・意識障害として既に報告されている。
こうした懸念すべき結果にもかかわらず、研究者らはセフェピムの使用中止を推奨するには至らなかった。入院患者への有効な広域抗生物質としての価値を認識しているためだ。代わりに、同薬の安全性プロファイルを明確にするための臨床ガイドラインの更新と追加研究を求めた。本研究は、医薬品安全性監視(ファーマコビジランス)の重要性を改めて示すものである。
Schlüsselvokabular
- broad-spectrumadjective
Effective against a wide range of bacteria or other microorganisms, rather than targeting a specific type.
和訳: 広域スペクトルの
Doctors often prescribe broad-spectrum antibiotics when the specific cause of an infection has not yet been identified.
- febrile neutropenianoun
A serious medical condition in which a patient develops fever alongside an abnormally low level of neutrophils, the white blood cells that fight infection, making them highly vulnerable to life-threatening infections.
和訳: 発熱性好中球減少症
Patients undergoing chemotherapy are at heightened risk of febrile neutropenia, which can rapidly become life-threatening.
- neurotoxicitynoun
The capacity of a substance to damage the nervous system, potentially causing symptoms such as confusion, seizures, or impaired consciousness.
和訳: 神経毒性
Certain chemotherapy drugs are known to cause neurotoxicity, leading to memory problems and difficulty concentrating in some patients.
- Bayesian meta-analysisnoun
A statistical approach that combines data from multiple studies and uses probability theory to estimate the likelihood that an observed association is real.














