Why is my doctor asking me to switch from an Albuterol inhaler to a flowvent inhaler while I'm pregnant can using Albuterol cause early labor?

The propellant for inhalers is changing and the old CFC propellant ones cannot be sold after December 31, 2008. Probably you will still be taking the same drug, just the delivery system will change. The jury is still out on pros and cons of albuterol during pregnancy.