Pharmaceutical compositions are provided comprising one or more orally deliverable dose units, each comprising a selective cyclooxygenase-2 inhibitory drug of low water solubility, for example celecoxib, in an immediate-release fraction and a controlled-release, slow-release, programmed-release, timed-release, pulse-release, sustained-release or extended-release fraction. The compositions are useful in treatment or prophylaxis of cyclooxygenase-2 mediated conditions and disorders.