Drugs Some drugs & antibiotics can damage the function of hair cells or the auditory nerve. Drugs which can cause damage to the hairlike cells of the cochlea are quinine, aminoglycerides, diuretics, aspirin in large doses and some cancer drugs.
Rupture Rupture of the eardrum can be caused by a blow to the ear, extreme air pressure changes associated with flying or scuba diving, a sharp foreign object used to clean the ears, or from pressure caused by fluid from a middle ear infection. Fever: High fever for a prolonged period of time can harm the inner ear structure.
Injuries Head injuries which cause a reduced blood supply can harm the inner ear structure.