I use it for sinus trouble or when I can`t breathe due to a cold. It`s the original Sudafed (not Sudafed cold etc which have other ingredients). Not recommended if you have high blood pressure though as it`s a vasoconstrictor (constricts the blood vessels)
Jackdaw....both ephedrine AND pseudophedrine act on the bronchioles of the lungs opening them up....as in asthma........but ephedrine is more effective.