The invention relates to the use of a chemical substance selected from the
group consisting of N-'2-hydroxy-3-(1-piperidinyl)-propoxyl
!-pyridine-1-oxide-3-carboximidoyl chloride, the optically active
enantiomers and the mixtures of enantiomers thereof and pharmaceutically
acceptable salts of the racemic and optically active compounds in the
preparation of a pharmaceutical composition for the treatment or
prevention of neurodegenerative diseases.