Albuterol. Albuterol is a type of beta-agonist. It acts by activating beta receptors in lungs which results in dilation and easier breathing. It can also speed up the heart rate because of its beta receptor effects. It has no steroidal activity. However, both bronchodilators and steroids are used in treatment of asthma. Albuterol is used by asthmatics both in inhaler and nebulizer form.