What Are Hydrofluoroalkane Inhalers Or HFAs And How Do They Work?

- Aug 29, 2019-


Hydrofluoroalkane inhalers(using Hfa-134A Pharma Grade as propellant) or HFAs (formerly called meter does inhalers) provide the drug through a small, handheld aerosol canister. They work like a spray can. You push the inhaler, it sprays out the medicine, and you breathe it in. A tube-like gadget called a spacer can help kids or people with trouble breathing use an HFA more easily.

Hydrofluoroalkane inhalers(using Hfa-134A Pharma


What do we need to Know about Metered-Dose Inhalers and the HFA Propellant

There are a number of ways to deliver inhaled medication. They include:

  • Metered-dose inhaler (MDI)

  • Metered-dose inhaler with spacer/holding chamber

  • Dry powder devices

  • Soft-mist device

  • Nebulizer

This information will focus on the metered-dose inhalers. The metered-dose inhalers contain an HFA propellant (hydrofluoroalkane propellant) propellant. The table below is a current list of metered-dose inhalers with the HFA propellant.


            hydrofluoroalkane propellant