A nasal fluid dispenser assembly comprising: - a first reservoir containing a plurality of doses of a fluid, a metering pump being mounted on said first reservoir so as to dispense a dose of said fluid each time said dispenser assembly is actuated, said metering pump including a piston that is movable axially along a longitudinal axis, - a compressed gas flow generator system for dispensing a flow of compressed gas each time said dispenser assembly is actuated, - a nasal endpiece comprising a connection portion and a nasal insertion element, said connection portion being fastened at one end to the outlet of said metering pump, and at the other end to the outlet of said compressed gas flow generator system, said connection portion including a fluid chamber that, each time said dispenser assembly is actuated, receives the dose of fluid dispensed by said metering pump, and the flow of compressed gas dispensed by said compressed gas flow generator system, said nasal insertion element comprising an elongate body for inserting into a user's nostril, said elongate body extending longitudinally along an axis and containing a dispenser channel that is connected at one end to said fluid chamber, and that is provided at the other end with a dispenser orifice through which said dose of fluid and said flow of compressed gas are dispensed, said axis forming an angle (α) relative to said longitudinal axis, wherein, said dispenser assembly comprises means for actuating said metering pump before said compressed gas flow generator system, such that said dose of fluid is initially dispensed into said fluid chamber, and then said dose of fluid is expelled under pressure by said flow of compressed gas out from said fluid chamber, through said dispenser channel, and through said dispenser orifice, characterized in that said dose of fluid combines with said compressed gas flow in said nostril, wherein said compressed gas flow generator system includes locking means that are released after said dose of fluid has been dispensed by said metering pump, said locking means prevent said compressed gas flow generator system from being actuated and/or said compressed gas flow from being dispensed. - a first reservoir containing a plurality of doses of a fluid, a metering pump being mounted on said first reservoir so as to dispense a dose of said fluid each time said dispenser assembly is actuated, said metering pump including a piston that is movable axially along a longitudinal axis, - a compressed gas flow generator system for dispensing a flow of compressed gas each time said dispenser assembly is actuated, - a nasal endpiece comprising a connection portion and a nasal insertion element, said connection portion being fastened at one end to the outlet of said metering pump, and at the other end to the outlet of said compressed gas flow generator system, said connection portion including a fluid chamber that, each time said dispenser assembly is actuated, receives the dose of fluid dispensed by said metering pump, and the flow of compressed gas dispensed by said compressed gas flow generator system, said nasal insertion element comprising an elongate body for inserting into a user's nostril, said elongate body extending longitudinally along an axis and containing a dispenser channel that is connected at one end to said fluid chamber, and that is provided at the other end with a dispenser orifice through which said dose of fluid and said flow of compressed gas are dispensed, said axis forming an angle (α) relative to said longitudinal axis,