How is action of epherdine and pseudoepherdine?

Ephedrine (α1, α2, β1, β2 releasing agent) Ephedrine produces a mild stimulation of the CNS. This increases alertness, decreases fatigue, and prevents sleep. It also improves athletic performance. Ephedrine has been used to treat asthma, as a nasal decongestant (due to its local vasoconstrictor action), and to raise blood pressure Pseudoephedrine is primarily used to treat nasal and sinus congestion.