I just started using the Teva Albuterol Sulfate HFA Inhaler three weeks ago, and have had breathing problems since the beginning of use. I have bronchitis, which is not getting better on antibiotics and am coughing up huge amounts of phlem. I am also hoarse and that is getting worse. I had only one or two puffs left of my older albuterol inhaler and had relief as long as that lasted. I have had headaches, nausea, stomach upset as well. This is a dangerous product.