(+) - alpha- (2,3-dimetoxifenil) -1- (2- (4-fluorophenyl) ethyl) -4-piperidinmethanol or its profarmaco to treat dementia or cognitive disability.

The use of (+) - a- (2,3-dimethoxyphenyl) -1- [2- (4-fluorophenyl) ethyl] -4-piperidinemethanol, or a pharmaceutically acceptable salt thereof; or of a prodrug, its stereoisomer or a pharmaceutically acceptable salt thereof, wherein the prodrug is a compound of formula II (See formula) wherein R is C1-C20 alkyl, for the preparation of a medicament for the treatment of dementia .