Preventer inhalers are usually prescribed if a reliever inhaler such as salbutamol does not suffice to control your asthma symptoms. This may be the case if you are experiencing symptoms at night or if you suffer from asthma symptoms more than three times a week. You may also be prescribed a preventer inhaler if you suffer serious asthma attacks or if you have to use your reliever inhaler several times a week.
Preventer inhalers do not usually provide fast relief from symptoms but when used over a long period of time they prevent symptoms and asthma attacks. Some preventer inhalers, however, can also be used to treat acute symptoms. Your GP will advise you on how and when to use your inhaler when you receive your original prescription.