Disclosed is a method of forming a plurality of re-constitutable doses of at least one drug in a plurality of wells, the method including the steps of (i) placing a known amount of said drug in a suitable carrier to form a first composition having a known concentration (ii) placing at least two selected amounts of that first composition into individual wells and (iii) converting the first composition into a transportable form by evaporation of the carrier or by freezing so that the first composition can later be converted into a second composition having a known concentration and (iv) sealing the wells.