Ephedrine exhibits optical isomerism and has two chiral centres. By Conference the enantiomers with reverse stereochemistry across the chiral centres are specified ephedrine, when pseudoephedrine has identical stereochemistry around the chiral carbons. Ephedrine should not be used along with certain antidepressants, specifically SNRIs (Selective norepinephrine re-uptake inhibitors), a... http://3-fmc02233.aioblogs.com/20110787/5-easy-facts-about-benzocaine-described