The present invention provides a gel composition intended for use as a drug delivery device, particularly for use in the sinus cavity. The gel composition can include a gelling agent that includes at least one polysaccharide, a propellant in the form of a sterile gas, and optionally, at least one active ingredient. The polysaccharide can be selected from the group consisting of hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, carrageenans, and combinations thereof.