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Drug-induced ototoxicity. Pathogenesis and prevention
Medical Toxicology and Adverse Drug Experience
|November 1, 1989
Summary
Ototoxicity, a hearing loss side effect from drugs like antibiotics and chemotherapy, remains poorly understood. Further research is needed to establish molecular mechanisms and develop preventive strategies for ototoxic drug therapies.
Area of Science:
- Pharmacology
- Toxicology
- Otolaryngology
Background:
- Ototoxicity is a significant adverse effect of common medications, including diuretics, anti-inflammatory agents, antineoplastic agents, and aminoglycoside antibiotics.
- Drug-induced hearing loss can be acute and reversible (e.g., with diuretics) or delayed and irreversible (e.g., with antineoplastics and aminoglycosides), affecting both auditory and vestibular functions.
- Concurrent use of ototoxic agents or exposure to loud noise can exacerbate hearing damage.
Purpose of the Study:
- To review the clinical and experimental features of ototoxicity induced by various drug classes.
- To emphasize current knowledge regarding the mechanisms of ototoxicity.
- To explore potential strategies for the prevention of drug-induced ototoxicity.
Main Methods:
- Review of clinical and experimental literature on ototoxicity.
- Analysis of drug classes associated with hearing and vestibular impairment.
- Focus on molecular mechanisms and structure-toxicity relationships.
Main Results:
- Ototoxic drugs impair auditory sensory cells in the organ of Corti, leading to hearing loss and tinnitus.
- Mechanisms of ototoxicity are not fully elucidated for most drugs, hindering prediction and prevention.
- Synergistic effects and potentiation by noise contribute to hearing loss.
Conclusions:
- Understanding the molecular basis of ototoxicity is crucial for predicting drug risks.
- Development of rational prevention strategies for ototoxic therapies is lacking.
- Further research into drug-induced ototoxicity mechanisms is essential for patient safety.