Other breath-activated inhalers are also called dry powder inhalers. These inhalers do hamiş contain the pressurised inactive gas to propel the medicine. You don't have to push the canister to release a dose. At standard inhaled doses, the amount of medicine is small compared with tablets or liquid medicines. Therefore, http://www.stes.tyc.edu.tw/xoops/modules/profile/userinfo.php?uid=2413040