Abstract: Use of adamantane derivatives of the formula ##STR1## in which R1 and R2 are identical or different and can be hydrogen or straight-chained or branched alkyl groups having 1 to 6 carbon atoms, ortogether with the nitrogen atom can represent a heterocyclic group having 5 or 6 ring atoms,in which R3 and R4 are identical or different and can be hydrogen, straight-chained or branched alkyl groups having between 1 and 6 carbon atoms, cycloalkyl groups having 5 or 6 carbon atoms or a phenyl group, and in which R5 is hydrogen or a straight-chained or branched alkyl group having between 1 and 6 carbon atoms for treating diseases of the inner ear.

Abstract: An apparatus (1) comprising a cassette holder (5) which has a bottom wall (6) and into which, at option, a larger first cassette (7) or at least one smaller further cassette (8) can be inserted, and comprising at least one positioning device (37, 38, 39) for the smaller further cassette (8) and a blocking device (54, 55, 56) for the positioning device (37, 38, 39), which locking device serves for blocking the positioning device (37, 38, 39) in its positioning position, the positioning device (37, 38, 39) and the blocking device (54, 55, 56) have been arranged on the cassette holder (5) in the area of the bottom wall (13), and the blocking device (54, 55, 56) and the positioning device (37, 38, 39) are movable into the non-blocking position and into the non-positioning position, respectively, by the larger first cassette (7) when it is inserted into the cassette holder (5).