Ventolin contains albuterol, a short-acting beta2-agonist. Xopenex contains levalbuterol, which is the R-enantiomer of albuterol. This means levalbuterol is a single, more potent isomer of albuterol.
Albuterol’s Action
Albuterol works by binding to beta2-adrenergic receptors in the lungs. This binding triggers a cascade of events leading to relaxation of the airway muscles (bronchodilation). The result is improved airflow and easier breathing.
- It quickly relieves symptoms of bronchospasm. Effects typically last for 4-6 hours.
Levalbuterol’s Action
Levalbuterol, being a single isomer, provides similar bronchodilation as albuterol, but with potentially fewer side effects due to its higher potency and selectivity for beta2-receptors.
It also offers rapid bronchodilation. Duration of action is comparable to albuterol.
Key Differences Summarized
While both medications achieve bronchodilation, levalbuterol offers a potential advantage in potency and potentially reduced side effects compared to albuterol. A doctor can help determine the best choice based on your individual needs.
