If you cannot locate this herb you
should try Brigham or Mormon Tea: Ephedra nevadensis. It is a much more mild version that grows in the deserts of the American West. I have had good success with it for a variety of sinus and bronchial issues.
Strangely enough, I get less result when I try to use too large of a dose. I typically use 15 to 20 drops of tincture that I make.