what is the difference between levalbuterol and budesonide?
They are essentially cousins due to their chemical similarities. Levalbuterol contains the active form of albuterol, known as R-albuterol, while albuterol contains a 50:50 mixture of R-albuterol and S-albuterol. S-albuterol is known to be an inactive form of albuterol that still contributes to side effects.