administration for example spray drops gel ointment cream powder or suspension using a dispenser or other device as needed a variety of dispensers and delivery vehicles are known in the art including single dose ampules atomizers nebulizers pumps nasal pads nasal sponges nasal capsules and the like more generally the preparation can take a solid semi solid or liquid form in the case of a solid form the components may be mixed together by blending tumble mixing freeze drying solvent evaporation co grinding spray drying and oilier techniques known in the art a semi solid preparation suitable for intranasal administration can take the form of an oil based gel or ointment in a preferred embodiment the nasal preparation is in liquid form which can include an oil solution an oil suspension the liquid preparation is administered as a nasal spray or as nasal drops using devices known in the art including nebulizers capable of delivering selected volumes of formulations as liquid droplet aerosols for example a commercially available spray pump with a delivery volume of 50 u03bcl or 100 u03bcl is available from for example valois congers n y with spray tips in adult size and pediatric size the liquid preparation can be produced by known procedures for example preparation for nasal administration can be produced by mixing l reuteri loaded with reuterin in an oleaginous base such as a pharmaceutically acceptable oil.