Abstract: The invention relates to an aqueous ionic solution, particularly for nasal use, including: at least one seawater solution having an osmolality of between 290 mOsm/kg and 400 mOsm/kg in a weight proportion of between about 30 and 98 wt % relative to the total weight of the composition; at least one cationic phospholipid of natural origin in a weight proportion of between about 0.01 and 5 wt % relative to the total weight of the composition; and at least one compound, which is originally immiscible with said seawater solution, in a weight proportion of between 0.01 and 10 wt % relative to the total weight of the composition.

Abstract: A method of using a seawater-based isoosmotic ionic solution for manufacturing a medical device for administering said solution by nasal spray or mist to patients in the remission phase of the common cold or flu syndrome, or to patients suffering from the common cold or flu syndrome, to prevent and/or treat complications of the common cold or flu syndrome is described.

Abstract: The invention relates to a single-dose container fitted with a spray tip comprising a generally cylindrical nozzle, the upper end of which comprises a spray opening and the opposite end of which is extended by a plunger of smaller diameter, the free end of which is mechanically reinforced, the nozzle and the plunger being crossed along their longitudinal axis by a traversing cavity, said traversing cavity having at the nozzle a means of creating droplets; it also relates to the actual tip and to a spray kit comprising said nozzle and a pre-filled single-dose bottle.