Abstract: A device for providing pharmaceutical doses comprising a container, filed with a pharmaceutical composition including glyceryl trinitrate and 1,1,1,2-tetrafluoroethane, or 1,1,1,2,3,3,3-heptafluoropropane, as a propellant, and a valve arranged for delivering aerosol doses of said pharmaceutical composition to the exterior of the container, wherein at least a portion of the device is formed from a polyester.