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Best Answer: Inhaler therapy for asthma can be slightly confusing. It is important that you understand what your different inhalers contain, how they work and when to use them. A blue inhaler contains a short-acting reliever of symptoms (most commonly salbutamol).Salbutamol acts on beta-receptors of the bronchial airways of your lungs.These airways constrict during an asthma attack.ow to your purple inhaler. Purple inhalers are combination inhalers. They contain a long-acting reliever (like salmeterol) and a steroid preventer (like fluticasone propionate). The long acting reliever acts on the same receptors that salbutamol acts on, but they bind for much longer.
Usually blue, short-acting reliever inhalers contain medicine that relaxes the airways and makes it easier for you to breathe. Metered dose inhalers (MDIs) give the medicine in a spray form (aerosol), for example Ventolin, Airomir and Salamol.