"Fantastic, the mentholated one is great &amp; really soothes painful inflammation soreness which accompany COPD flareups. When having worsening asthma attacks I use it to ward off serious complications including pneumonia. I take two inhalations of my fast acting then two hits of the Aerobid-M every 8 -10 hrs &amp; is nearly always effective although can take as long as a week for severe inflammations to subside. But it is costly."