Pseudoephedrine,based on the chemical structure of ephedrine from the Gnetophyte genus Ephedra,is used as a treatment for:

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Pseudoephedrine is used as a nasal decongestant to relieve symptoms of congestion and sinus pressure caused by allergies, the common cold, or other respiratory illnesses. It constricts blood vessels in the nasal passages, which decreases swelling and allows for easier breathing. It is not used to treat cancer, headache, malaria, or erectile dysfunction.

Pseudoephedrine,based on the Chemical Structure of Ephedrine from the Gnetophyte