Oseltamivir phosphate containing pharmaceutical composition

The present invention is a pharmaceutical composition containing one or more excipients, and oseltamivir phosphate equilibrium moisture content at a relative humidity of 70% at 25 ° C. is selected from sugars and sugar alcohols is less than 1 wt% Te, the content of glucose and mannose are contained as impurities in the sugar and in the sugar alcohol to provide a pharmaceutical composition is respectively 0.01 wt% or less with respect to the sugar or sugar alcohol.