Quikhale FB 400 Inhaler is a mix of two medications in one inhaler It relieves the long term symptoms of asthma and COPD making breathing easier It works by inhibiting the release of certain chemical messengers that cause inflammation swelling and relaxes the muscles in the airways Your doctor will tell you how often you need to use your inhaler The effect of this medication may be noticeable after a few days but will only reach its maximum after a few weeks This medication must be utilized regularly to be effective so go on taking it even if you don t have any symptoms That means it s doing its job If you stop taking it your symptoms may get worse This medication should not be utilized to relieve sudden shortness of breath If sudden shortness of breath occurs use your rescue inhaler To get the benefit from this medication you need to make sure you get your inhaler technique right otherwise it does not work as well