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Ototoxicity is the property of being toxic to the ear (oto-), specifically the cochlea or auditory nerve and sometimes the vestibular system, for example, as a side effect of a drug. The effects of ototoxicity can be reversible and temporary, or irreversible and permanent. It has been recognized since the 19th century. [1]
Ototoxicity is defined as the toxic effect on the functioning of the inner ear, which may lead to temporary or permanent hearing loss (cochleotoxic) and balancing problems (vestibulotoxic). [1] Drugs or pharmaceutical agents inducing ototoxicity are regarded as ototoxic medications .
Nephrotoxicity is toxicity in the kidneys. It is a poisonous effect of some substances, both toxic chemicals and medications, on kidney function. [1] There are various forms, [2] and some drugs may affect kidney function in more than one way. Nephrotoxins are substances displaying nephrotoxicity.
Another serious and disabling side effect of aminoglycoside use is vestibular ototoxicity. [19] This leads to oscillopsia (gaze instability) and balance impairments that impact all aspects of an individual's antigravity function. This loss is permanent and can happen at any dose. [21] [22] [23] [24]
Nephrotoxicity, nausea and vomiting (30-100%), myelosuppression, electrolyte anomalies, peripheral neuropathy, ototoxicity and anaphylaxis, haemolytic anaemia (rare), optic neuritis (rare), reversible posterior leucoencephalopathy syndrome (rare), seizures (rare), ECG changes (rare) and heart failure (rare).
Kidney damage (nephrotoxicity) Ear disorders (ototoxicity) Nephrotoxicity and ototoxicity are thought to be dose related with higher doses causing greater chance of toxicity. [14] These two toxicities may have delayed presentation, sometimes not appearing until after completing treatment. [14]
Amikacin can cause neurotoxicity if used at a higher dose or for longer than recommended. The resulting effects of neurotoxicity include vertigo, numbness, tingling of the skin (paresthesia), muscle twitching, and seizures. [9] Its toxic effect on the 8th cranial nerve causes ototoxicity, resulting in loss of balance and, more commonly, hearing ...
Loop diuretics usually have a ceiling effect whereby doses greater than a certain maximum amount will not increase the clinical effect of the drug. Also, there is a threshold minimum concentration of loop diuretics that needs to be achieved at the thick ascending limb to enable the onset of abrupt diuresis.