プソイドエフェドリンMeanings1nounpseudoephedrineA sympathomimetic drug commonly used as a nasal decongestant. The English gloss 'pseudoephidrene' appears to be a misspelling; the standard English term is pseudoephedrine.プソイドエフェドリンは鼻び炎えん薬やくによく含ふくまれている。Pseudoephedrine is often included in rhinitis medications.