The present invention relates to a pharmaceutical composition comprising a carboxylic acid or a pharmaceutically acceptable salt thereof as active ingredient for use in treating and/or alleviating and/or preventing nasal congestion, a viral infectious disease of the respiratory tract or an inflammation of the throat. Furthermore, the present invention relates to a method for treating and/or alleviating and/or preventing nasal congestion, viral infections of the respiratory tract and/or inflammation of the throat in. a patient, comprising administering an effective amount of a carboxylic acid or a pharmaceutically acceptable salt thereof or a pharmaceutical composition comprising a carboxylic acid or a pharmaceutically acceptable salt thereof to a patient in need thereof. In addition, the present invention relates to a method for alleviating the symptoms associated with nasal congestion, viral infections of the respiratory tract and/or inflammation of the throat comprising administering an effective amount of a carboxylic acid or a pharmaceutically acceptable salt thereof or a pharmaceutical composition comprising a carboxylic acid or a pharmaceutically acceptable salt thereof to a patient in need thereof.La presente invención se refiere a una composición farmacéutica que comprende un ácido carboxílico o una sal farmacéuticamente aceptable del mismo como ingrediente activo para usar en el tratamiento y/o alivio y/o prevención de una congestión nasal, una enfermedad infecciosa viral del tracto respiratorio o una inflamación de la garganta. Además, la presente invención se refiere a un método para tratar y/o aliviar y/o prevenir congestión nasal, infecciones virales del tracto respiratorio y/o inflamación de la garganta en un paciente, que comprende administrar una cantidad efectiva de un ácido carboxílico o una sal farmacéuticamente aceptable del mismo o una composición farmacéutica que comprende un ácido carboxílico o una sal farmacéuticamente aceptable del mismo a u
