Albuterol is a drug used to treat asthma. albuterol and epinephrine are both agonists for a receptor that stimulates the dilation of bronchioles. albuterol and epinephrine are examples of

Bronchodilators: Beta-Adrenergic Agonists

Explanation:

Bronchodilators may be defined as the substance that increases the dilation of bronchi and bronchioles that ultimately increases the airflow to the lungs. They may be used to treat the respiratory problems.

Albuterol and epinephrine are bronchodilators that are beta adrenergic agonist that causes the dilation and relaxation of smooth muscles. They aided the dilation of bronchial passage.

Thus, the answer is bronchodilators: Beta-Adrenergic Agonists.