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.
What is a hydrofluoroalkane inhaler with a spacer? Inhaled asthma medications are often delivered by using a device called an hydrofluoroalkane inhaler or HFA. The HFA used to be called a metered dose inhaler or MDI. The inhaler is a small aerosol canister in a plastic holder that delivers a puff of medication to the lungs. To help make it easier for your child to use the HFA and ensure the medication gets into the lungs, your child may use a spacer chamber (with or without a mask) with the inhaler.