[Chiral switch: pure enantiomers of drugs instead of racemic mixtures].

Chirality of drugs, particularly the comparison of efficacy of enantiomers and their racemic mixtures, has become an object of serious interest of pharmaceutical researchers in recent ten or fifteen years. Advances in chemical technologies connected with the synthesis, separation, and analysis of pure enantiomers from racemates, together with administrative regulatory measures, have resulted in an…