what is pseudoephedrine
Pseudoephedrine (/ËsjuËdoÊ.É¨ËfÉdrÉªn/ or /ËsjuËdoÊËÉfÉ¨driËn/ ; PSE) is a sympathomimetic drug of the phenethylamine and amphetamine chemical classes.It may be used as a nasal/sinus decongestant, as a stimulant, or as a wakefulness-promoting agent.n the outdated d/l system (+)-pseudoephedrine is also referred to as l-pseudoephedrine and (â)-pseudoephedrine as d-pseudoephedrine (in the Fisher projection then the phenyl ring is drawn at bottom). Often the d/l system (with small caps) and the d/l system (with lower-case) are confused.