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Researchers compared mild asthma patients who were given inhaled albuterol four times daily to those who took the medicine only when they felt they needed it. The study lasted for 16 weeks. No significant differences between the groups were found in asthma symptoms or quality of life, as well as in a number of lung function measurements. But for those patients who do feel better on a regular schedule, they can be assured that it is not harmful to do so. Asthma patients may be able to achieve their best control with less frequent doses.