Introduction [edit]. A carboxyl group consists of a carbon double-bonded to an oxygen and also bonded to a-OH group. Compounds with carboxyl groups are called carboxylic acids or organic acids. The carboxyl group can act as an acid when by donating a proton (H +) to a solution and becoming ionized.
It therefore makes perfect sense to use the bronchodilator first, wait a few minutes, and then to use the steroid inhaler, after the airways have been opened up and are more relaxed. This way, the steroid can penetrate the lungs more effectively, and get down to decrease inflammation in your smaller airways.
Sometimes these are known as evohalers. The standard MDI is the most widely used inhaler. However, many people do not use it to its best effect. Errors include: 1  Not shaking the inhaler before using it. 2  Inhaling too sharply or at the wrong time. 3  Not holding your breath long enough after breathing in the contents.