Doctors, what is the difference between xopenex (levalbuterol) and albuterol (nebulizer meds.)?

Same chem'l structur. They are both bronchodilators and chemically the same structure. Xopenex (levalbuterol) has been called the son of albuterol and many physicians prefer it as it generally has les of the side effects associated with Albuterol.