Question

Beta 2 agonist drugs are preferred over epinephrine alone because

Answer 1

Beta 2 agonist drugs are preferred over epinephrine alone because they have a more specific and selective effect on the beta-2 adrenergic receptors, leading to bronchodilation and relief from asthma symptoms.

Step-by-step explanation:

Beta 2 agonist drugs are preferred over epinephrine alone because they have a more specific and selective effect on the beta-2 adrenergic receptors. Epinephrine binds to both the beta-1 and beta-2 receptors, which can lead to unwanted side effects such as increased heart rate and blood pressure. In contrast, beta 2 agonist drugs primarily target the beta-2 receptors found in the smooth muscle of the airways, leading to bronchodilation and relief from asthma symptoms.

For example, drugs like albuterol and salmeterol are commonly used as beta 2 agonist drugs to treat asthma. These medications specifically bind to the beta-2 receptors in the airway smooth muscle, causing relaxation and opening of the airway passages.

By selectively targeting the beta-2 receptors, beta 2 agonist drugs can provide more focused and effective treatment for conditions like asthma, without the potential side effects associated with non-selective stimulation of both beta-1 and beta-2 receptors.