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Ceftiaxone-induced neurotoxicity: case report, pharmacokinetic considerations, and literature review.
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MedLine Citation:
PMID:  22969263     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Ceftriaxone is widely used in patients for the treatment of serious gram-negative infections. Ceftriaxone can induce some potential side effects, including neurotoxicity, however, nonconvulsive status epilepticus has rarely been reported. We report a case of acute reversible neurotoxicity associated with ceftriaxone. A 65-yr-old woman with chronic kidney disease developed altered consciousness during ceftriaxone treatment for urinary tract infection. The electroencephalogram demonstrated continuous bursts of generalized, high-voltage, 1 to 2 Hz sharp wave activity. Neurologic symptoms disappeared following withdrawal of ceftriaxone. The possibility of ceftriaxone-induced neurotoxicity should be considered in patients developing neurological impairment during ceftriaxone use, and the discontinuation of the drug could lead to complete neurological improvement.
Authors:
Ki Bae Kim; Sun Moon Kim; Woori Park; Ji Seon Kim; Soon Kil Kwon; Hye-Young Kim
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Publication Detail:
Type:  Case Reports; Journal Article     Date:  2012-08-22
Journal Detail:
Title:  Journal of Korean medical science     Volume:  27     ISSN:  1598-6357     ISO Abbreviation:  J. Korean Med. Sci.     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-09-12     Completed Date:  2013-01-16     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  8703518     Medline TA:  J Korean Med Sci     Country:  Korea (South)    
Other Details:
Languages:  eng     Pagination:  1120-3     Citation Subset:  IM    
Affiliation:
Department of Internal Medicine, Chungbuk National University Hospital, Cheongju, Korea.
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MeSH Terms
Descriptor/Qualifier:
Aged
Anti-Bacterial Agents / adverse effects*,  therapeutic use
Anticoagulants / therapeutic use
Ceftriaxone / adverse effects*,  therapeutic use
Electroencephalography
Female
Humans
Nervous System Diseases / etiology*
Renal Dialysis
Renal Insufficiency, Chronic / pathology
Seizures / etiology
Thrombosis / diagnosis,  drug therapy
Tomography, X-Ray Computed
Urinalysis
Urinary Tract Infections / diagnosis,  drug therapy
Chemical
Reg. No./Substance:
0/Anti-Bacterial Agents; 0/Anticoagulants; 73384-59-5/Ceftriaxone
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Full Text
Journal Information
Journal ID (nlm-ta): J Korean Med Sci
Journal ID (iso-abbrev): J. Korean Med. Sci
Journal ID (publisher-id): JKMS
ISSN: 1011-8934
ISSN: 1598-6357
Publisher: The Korean Academy of Medical Sciences
Article Information
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© 2012 The Korean Academy of Medical Sciences.
open-access:
Received Day: 16 Month: 1 Year: 2012
Accepted Day: 19 Month: 4 Year: 2012
Print publication date: Month: 9 Year: 2012
Electronic publication date: Day: 22 Month: 8 Year: 2012
Volume: 27 Issue: 9
First Page: 1120 Last Page: 1123
ID: 3429834
PubMed Id: 22969263
DOI: 10.3346/jkms.2012.27.9.1120

Ceftiaxone-Induced Neurotoxicity: Case Report, Pharmacokinetic Considerations, and Literature Review
Ki Bae Kim1
Sun Moon Kim1
Woori Park1
Ji Seon Kim2
Soon Kil Kwon13
Hye-Young Kim13
1Department of Internal Medicine, Chungbuk National University Hospital, Cheongju, Korea.
2Department of Neurology, Chungbuk National University College of Medicine, Cheongju, Korea.
3Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea.
Correspondence: Address for Correspondence: Sun Moon Kim, MD. Department of Internal Medicine, Chungbuk National University Hospital, 776 1Sunhwan-ro, Heungdeok-gu, Cheongju 361-711, Korea. Tel: +82.43-269-6351, Fax: +82.43-273-3252, uptoyousm@gmail.com

INTRODUCTION

Ceftriaxone is a third-generation cephalosporin, commonly used in the treatment of serious gram-negative infections due to its broad antimicrobial spectrum, long half-life, and easy penetration into the cerebrospinal fluid (1, 2). Contrary to other cephalosporins, a dose adjustment is not required for ceftriaxone even in the presence of renal insufficiency, thus it is prescribed conveniently for patients with chronic kidney disease (CKD) (3). Neurologic adverse effects of ceftriaxone are infrequent, however, encephalopathy, myoclonus, and seizures may occur as exemplified in other cephalosporins (4-6). Here, we describe a case of ceftriaxone-induced nonconvulsive status epilepticus (NCSE) with characteristic electroencephalogram (EEG) findings and discuss with literature review.


CASE DESCRIPTION

A 65-yr-old woman with CKD was admitted to our hospital because of abdominal pain and poor oral intake on November 18, 2010. She had been diagnosed with idiopathic membranous glomerulonephropathy on renal biopsy six months prior to admission. Her abdominal discomfort began two weeks earlier and was located predominantly in the right lower quadrant, and was associated with lower back discomfort. She described a constant pressure unrelated to food intake that was associated with intermittent nausea and vomiting. Her symptoms were not relieved by the administration of antacid, acetaminophen, or defecation. Laboratory data at patient admission were as follows: serum creatinine 3.2 mg/dL (1.7 mg/dL, 8 weeks before admission), albumin 1.8 g/dL (2.7 g/dL, 8 weeks before admission), and random urine protein-to-creatinine ratio 10.4 g/g (3.3 g/g, 8 weeks before admission), which demonstrated the deterioration of renal function and increase in urinary protein excretion. Gastroscopy exhibited superficial gastritis and the colonoscopy revealed no observable mucosal lesions. To identify other potential causes of abdominal pain and exacerbation of renal insufficiency, such as renal vein thrombosis, computed tomography (CT) scan of abdomen and pelvis was recommended, however she refused further work up being afraid of hemodialysis following CT scan. On day 15 of the hospitalization, she developed a chill, and her temperature rose to 38.5℃. Because she complained of vague urinary symptoms and urinalysis demonstrated pyuria and bacteriuria, ceftriaxone (2 g/day) was administered intravenously for empirical treatment of urinary tract infection. Her temperature returned to normal after three days. On day 20 of the patient's hospitalization, her mental status deteriorated suddenly into stupor and generalized myoclonic jerks were appeared. There was no history of seizures, and no other relevant neurological features observed upon neurological examination. The patient exhibited no fever and the C-reactive protein was 3.2 mg/dL (normal range < 0.3). The serum creatinine level rose to 6.7 mg/dL and the daily urine amount decreased to 300 mL, therefore an emergent hemodialysis was initiated for progressive uremia. Her consciousness did not improve despite 24-hr intensive hemodialysis. A Brain CT demonstrated no abnormalities to explain these neurologic findings. An EEG recording on the next day showed generalized slowing with superimposed almost continuous or periodic bursts of sharp waves or sharp and slow wave activity (Fig. 1A). Under the impression of ceftriaxone-induced NCSE, ceftriaxone was discontinued on day 22 of the hospitalization, and she returned to a completely alert, cooperative, and oriented state within two days of cessation of the drug. The EEG on day 24 showed slowing of the background without epileptiform discharges (Fig. 1B). In addition, the abdomen/pelvis CT revealed extensive thrombosis at the inferior vena cava, both renal veins, right ovarian vein, and both external iliac veins (Fig. 2), thus anticoagulation was started. The patient was discharged on day 58 without any neurologic signs or symptoms.


DISCUSSION

In this report, we described a case of NCSE following the administration of ceftriaxone in a patient with progressive renal impairment. The temporal relationship between the start of ceftriaxone therapy and the manifestation of NCSE as well as the withdrawal of ceftriaxone and the disappearance of the symptom strongly indicated that ceftriaxone was a causative agent. Moreover, hemodialysis did not improve her mental status, and we could not find any other factors that could explain the neurologic symptom observed.

Neurotoxicity has been reported with both third-generation and fourth-generation cephalosporins (7-9). Epileptogenic activity of β-lactam antibiotics was first shown in 1945, when seizures were reported in experimental animals following intraventricular injection of penicillin (10), particularly in the settings of renal failure and excessive dosage (11). The exact mechanism is not fully understood, but it has been proposed to be mediated by competitive antagonism of brain γ-aminobutyric acid (GABA), which is the principal inhibitory neurotransmitter in the brain (12). Inhibition of GABA action could lead to a low neuronal threshold and subsequent excitation. Other authors (13) have proposed that cephalosporins might induce the release of cytokines including tumor necrosis factor-α, which could cause direct cerebral toxicity.

Cephalosporin-induced neurotoxicity may manifest in a variety of clinical presentations, such as encephalopathy or mental status changes, myoclonus, asterixis, and seizures (4-8). The latency of neurotoxicity, the period between the start of cephalosporin treatment and the resulting neurologic manifestations, varied between one and ten days. All reported neurologic symptoms typically resolved within two to seven days after discontinuation of the drug. The ceftriaxone-associated neurologic syndrome observed in our patients was similar to studies previously described in the literature (6-8). Predisposing factors for cephalosporins-induced neurotoxicity include excessive dosage, renal insufficiency, pre-existing central nervous system (CNS) abnormalities, and increased cerebral penetration of the drug (12, 14, 15). Different EEG patterns have been described in association with cephalosporin neurotoxicity. EEG findings include diffuse slow-wave delta activity, semi-periodic triphasic sharp wave activity, or frank periodic discharges (7). These EEG abnormalities serve as evidence supporting the impact of cephalosporins on the CNS. Given that the majority of patients using cephaloporins have co-morbidity associated with mental alteration, EEG could be of benefit in the diagnosis and management of antibiotics-associated neurotoxicity.

The prevention of cephalosporin-induced neurotoxicity in high risk patients, as discussed above, is of the utmost importance. The careful monitoring of medication dosages and serum levels may be helpful in the minimization of this risk (7). As seen in this case report, many symptoms resolved completely only with discontinuation of the drug. Anticonvulsants such as phenytoin or valproate were administered in two previously reported cases, and their symptoms improved five days after stopping ceftriaxone (4). Besides, we did not use any anticonvulsants because of the rapid (< 2 days) clinical improvement after discontinuation of ceftriaxone. Data are still lacking as to whether patients with cephalosporin-induced NCSE require antiepileptic drug therapy or simple cessation of drugs results in improvement. However, some authors recommend that anticonvulsant therapy including lorazepam and/or phenytoin might be considered in NCSE until the patient's mental status returns to normal and periodic discharges or NCSE shown on EEG resolve (7). Since neurotoxicity related to cephalosporins is reversible, it is unlikely that patients would need long-term anticonvulsant therapy.

Ceftriaxone has a distinctive pharmacokinetic property unlike other cephalsporins (3). While most of cephalosporins are highly dialyzable (70% of a given dose over a 3-hr hemodialysis session), ceftriaxone is not dialyzed during hemodialysis (3, 7). Moreover, the pharmacokinetics of ceftriaxone in patients with renal insufficiency differ markedly from those of other cephalosporins. Compared to values in healthy subjects, the half-life of other cephalosporins is prolonged 6- to 8-fold in patients with end-stage renal disease. However, the half-life of ceftriaxone is not greatly affected by a progressive decrease in the renal function (3). Accordingly, dose adjustment of ceftriaxone is not required for CKD patients. These pharmacokinetic characteristics might be related to the characteristics of ceftriaxone neurotoxicity. Only seven cases of ceftriaxone-induced neurotoxicity have been reported to date (Table 1). All the previous cases had renal impairment and 4 cases of those cases were on hemodialysis. There were 4 cases of choreoathetosis, 2 cases of NCSE, and one case of encephalopathy. Notably, there was no case of which the observed neurologic symptoms and signs were improved by dialysis. These findings are compatible with the pharmacokinetic property of ceftriaxone that is not removable by dialysis. Moreover, given that no dose adjustment is required for ceftriaxone in the patient with renal impairment, overdose did not seem to play a role in ceftriaxone-associated neurotoxicity. In the previous reports, the elimination half-life of ceftriaxone was markedly prolonged in some dialysis patients, it might be due to an impaired biliary excretion process that is the alternative pathway of elimination for ceftriaxone in CKD patients (7,16). These might contribute to the development of infrequent ceftriaxone neurotoxicity in patients with renal insufficiency.

Ceftriaxone can cause NCSE in patients with impaired renal function. This neurotoxicity should be considered carefully in patients with reduced renal function or prior CNS abnormalities. In addition, EEG should be performed when a patient receiving ceftriaxone develops neurological symptoms. Early recognition is of the utmost importance because the discontinuation of ceftriaxone reverts the symptoms completely.


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Article Categories:
  • Case Report
    • Neuroscience

Keywords: Ceftriaxone, Cephalosporins, Chronic Kidney Failure, Seizures.

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