Other breath-activated inhalers are also called dry powder inhalers. These inhalers do not contain the pressurised inactive gas to propel the medicine. You don't have to push the canister to release a dose. An acute exacerbation is more commonly known as a 'flare-up'. An acute exacerbation of chronic obstructive pulmonary https://escatter11.fullerton.edu/nfs/show_user.php?userid=7325886