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Effect of the topical application of some newer antibiotics on the cerebral cortex
Abstract:
Five currently used antibiotics--moxalactam, cefotaxime, cefoperazone, metronidazole, and piperacillin--and bacitracin were compared for epileptogenetic effect against penicillin G as a standard when applied directly to cat cerebral cortex. Piperacillin was half as epileptogenic as penicillin. Moxalactam, cefotaxime, and cefoperazone showed epileptogenicity one-fourth to one-eighth that of penicillin on a milligram per cubic centimetre basis. Neither metronidazole nor bacitracin produced any focal seizure activity at the highest concentrations tested. Some of the newer cephalosporin antibiotics may have a significant risk of inducing seizure activity if high concentrations come in direct contact with neocortical tissue.
Insights
Newer cephalosporin antibiotics like moxalactam, cefotaxime, and cefoperazone may increase seizure risk. These drugs showed epileptogenic effects, unlike metronidazole and bacitracin, when applied to cat brain tissue.
Area of Science:
- Neuropharmacology
- Clinical Neurology
- Antibiotic Research
Background:
- Antibiotics are crucial for treating infections.
- Potential neurotoxic side effects of antibiotics require careful evaluation.
- Understanding the epileptogenic potential of antibiotics is vital for patient safety.
Purpose of the Study:
- To compare the epileptogenic effects of commonly used antibiotics directly applied to the feline cerebral cortex.
- To establish a comparative epileptogenicity profile for selected antibiotics against penicillin G.
Main Methods:
- Direct application of antibiotics (moxalactam, cefotaxime, cefoperazone, metronidazole, piperacillin, bacitracin) to the cat cerebral cortex.
- Comparison of epileptogenic activity with penicillin G as a standard.
- Assessment of seizure activity at various concentrations.
Main Results:
- Piperacillin exhibited half the epileptogenicity of penicillin G.
- Moxalactam, cefotaxime, and cefoperazone demonstrated significantly lower epileptogenicity than penicillin G (one-fourth to one-eighth).
- Metronidazole and bacitracin did not induce focal seizure activity at tested concentrations.
Conclusions:
- Certain newer cephalosporins (moxalactam, cefotaxime, cefoperazone) possess epileptogenic potential.
- High concentrations of these cephalosporins in direct contact with neocortical tissue may pose a seizure risk.
- Metronidazole and bacitracin appear to have a lower risk of inducing seizures via direct cortical application.