Butorphanol (INN) is a morphinan-type synthetic opioid analgesic. Brand name Stadol was recently discontinued by the manufacturer. It is now only available in its generic formulations, manufactured by Novex, Mylan, Apotex and Roxane. Butorphanol is most closely structurally related to levorphanol. Butorphanol is available only as butorphanol tartrate in injectable and intranasal spray formulations
Is this it? I remember using it for preop patients many years ago. I think they use other drugs now, don't know one beginning with an "S"