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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.
Salbutamol (INN) or albuterol (USAN) is a short-acting Î²2-adrenergic receptor agonist used for the relief of bronchospasm in conditions such as asthma and chronic obstructive pulmonary disease (COPD).It is marketed as Ventolin among other brand names.n these forms of delivery, the maximal effect of salbutamol can take place within five to 20 minutes of dosing, though some relief is immediately seen. Mean duration of effect is roughly 2 hours.