L-Hyoscyamine sulfate (Daturine sulfate) is a tropane alkaloid that is a secondary metabolite found in certain plants of the solanaceae family. In vitro it has been shown to be an antagonist of mAChR[1].
[1]. Jones JB, et al. Sublingual hyoscyamine sulfate in combination with ketorolac tromethamine for ureteral colic: a randomized, double-blind, controlled trial. Ann Emerg Med. 2001 Feb;37(2):141-6.
















