Patient Info > HFA vs CFC Inhalers: What to Expect

There are some simple but important differences between the new HFA inhalers and the old CFC ones. It's important that you understand what these differences are so that you can get the most benefit from your new inhaler.

The spray from an HFA inhaler (also called the plume) is different from the spray of a CFC inhaler.

• The spray from an HFA inhaler may feel softer than that from a CFC inhaler. This doesn't mean you aren't getting the same amount of medicine with your HFA inhaler; it just has a more gentle delivery.
• The spray from an HFA inhaler may taste different than the spray from a CFC inhaler. This is because HFAs and CFCs are developed from different substances.
• The spray from an HFA inhaler may feel warmer than the spray from a CFC inhaler. This is because it is sent out of the MDI canister with less force than that of CFC inhalers, and therefore at a warmer temperature.

HFA inhalers may clog easier than CFC inhalers, so it's especially important that you clean your inhaler regularly.

• Rinse the mouthpiece of your inhaler under warm running water at least once a week.
• Be sure to shake off any excess water and let your inhaler dry completely after washing it.

HFA inhalers should be "primed" at appropriate times.

• Priming an inhaler involves spraying it into the air a number of times before use.
• You will need to prime your inhaler before you use it for the first time, if you haven't used it in 2 weeks, or if you've dropped it.
• Carefully follow the instructions for priming that come with your specific HFA inhaler.

Always be sure to follow your healthcare provider's instructions for using and caring for your HFA inhaler, as well as the directions in the package insert (information leaflet) that come with it.