all vent is a cough drink that dissolves phlegm and is a bronchodilator. all vent is one of the best bronchodilators that facilitate breathing. It is characterized by being sugar-free, which makes it one of the best cough medicines with phlegm, as all vent works to get rid of phlegm, the natural substances from which it is composed. all vent is the best choice for adults, children and children as well.