No, zafirlukast (generic name for Accolate) is not a steroid. It belongs to a different class of medications called antileukotrienes. Steroids, such as inhaled corticosteroids (e.g., fluticasone, budesonide) or oral corticosteroids (e.g., prednisone), are another type of medication commonly used in asthma treatment. They reduce inflammation in the airways. Zafirlukast (Accolate) works differently by blocking the effects of leukotrienes, while steroids primarily target and reduce airway inflammation.