etafedrine etafedrine etafedrine (inn) or ethylephedrine is a long-acting bronchodilator and has the brand name nethaprin. it was previously commercially available as both the free base and as the hydrochloride salt from sanofi-aventis (now sanofi) but is now no longer marketed. etafedrineclinical dataatc codenonelegal statuslegal status au: s2 (pharmacy medicine) withdrawn from market identifiers iupac name (1r,2s)-2--1-phenyl-1-propanol cas number48141-64-6 ypubchem cid10734chemspider85308 nunii2y6vqu63e8echa infocard100.051.218 chemical and physical dataformulac12h19nomolar mass193.290 g·mol−13d model (jsmol)interactive image smiles o(c1ccccc1)(n(cc)c)c inchi inchi=1s/c12h19no/c1-4-13(3)10(2)12(14)11-8-6-5-7-9-11/h5-10,12,14h,4h2,1-3h3/t10-,12-/m0/s1 nkey:irvlborjkfzwmi-jqwixifhsa-n n ny (what is this?) (verify) pharmacology unlike ephedrine and tyramine, etafedrine does not induce the release of epinephrine or norepinephrine and instead acts as a selective β2 adrenoreceptor agonist, thereby mediating its bronchodilator effects.