Trimium HFA Inhaler is used to treat chronic obstructive pulmonary disease (a lung disorder in which the flow of air to the lungs is blocked). Breathing becomes simpler as a result of the airway muscles being relaxed. Coughing, wheezing, and having trouble breathing are all alleviated.How frequently you should take your inhaler will be determined by your doctor. The impact of this medication may be felt within a few days, but it won't be fully felt for several weeks. Continue taking this medication even if you don't have any side effects because it needs to be taken frequently to be successful. It is thereby fulfilling its purpose. Your COPD could worsen if you stop taking it.Disclaimer:For more information contact your physician.