Asthma is an inflammatory disease of the lungs often triggered by an allergy or intolerance. Symptoms range from mild, such as an irritable cough, to severe, such as heavy wheezing, productive cough and shortness of breath that requires hospitalization. In conventional medicine, asthma is treated with a progressive approach which involves the use of reliever inhalers, preventer inhalers, and various chemical blockers such as histamine and cytokines. Inhalers are steroid-based. In acute situations, inhalers can be life-saving, however their prolonged use can cause unwanted side effects.