Abstract: Pharmaceutical compositions are provided containing tert-butyl-{[1-(4-chlorobenzyl)-3-hydroxy-2-oxo-1,2-dihydropyridin-4-yl]methyl}piperazine-1-carboxylate or a pharmaceutically acceptable salt thereof, more particularly to certain orally deliverable immediate release solid pharmaceutical compositions containing a pharmaceutically acceptable salt of tert-butyl-{[1-(4-chlorobenzyl)-3-hydroxy-2-oxo-1,2-dihydropyridin-4-yl]methyl}piperazine-1-carboxylate and orally deliverable delayed release solid pharmaceutical compositions containing tert-butyl-{[1-(4-chlorobenzyl)-3-hydroxy-2-oxo-1,2-dihydropyridin-4-yl]methyl}piperazine-1-carboxylate or a pharmaceutically acceptable salt of. Also provided are methods and uses related to said compositions, as well as processes for the preparation of said compositions, and certain dosage regimens for the administration thereof.