Synonyms: [3(S)-ENDO]-8-METHYL-8-AZABICYCLO[3.2.1]OCT-3-YL ESTER, ALPHA-(HYDROXYMETHYL)-BENZENEACETIC ACID SULFATE DIHYDRATE;HYOSCYAMINE SULFATE DIHYDRATE;HYOSCYAMINE SULPHATE;HYOSCYAMINE SULFATE;BENZENEACETIC ACID, ALPHA-(HYDROXYMETHYL)-, 8-METHYL-8-AZABICYCLO[3.2.1]OCT-3-YL ESTER, [3(S)-ENDO]-, SULFATE (2:1), DIHYDRATE;HYOSCYAMINESULFATE,USP;HOSCYAMINE SULFATE USP