Hyoscyamine is an AChR inhibitor with IC50 of 7.5 nM, it is widely used in medicine due to its anticholinergic activity. Hyoscyamine could be used to reduce abdominal discomfort and colonic spasm during a barium enema. (S)-atropine is an atropine with a 2S-configuration. It is functionally related to a (S)-tropic acid. It is a conjugate base of a (S)-atropinium.

Butylscopolamine bromide is an organic bromide salt of butylscopolamine. It is an antispasmodic drug which can relieve painful stomach cramps (including those linked with irritable bowel syndrome), bladder and menstrual cramps. It has a role as a muscarinic antagonist and an antispasmodic drug. It is a quaternary ammonium salt and an organic bromide salt. It contains a butylscopolamine. Scopolamine butylbromide is a competitive antagonist of muscarinic acetylcholine receptor (mAChR) with an IC50 of 55.3 ± 4.3 nM, it possesses anticholinergic, and anti-tumor effects, it used as an abdominal-specific antispasmodic agent. Scopolamine butylbromide is effective in preventing succinylcholine-induced bradycardia in infants and children.

Scopolamine hydrobromide is a competitive muscarinic acetylcholine receptor with an IC50 of 55.3 nM, it also reversibly inhibited the 5-HT3 receptor-responses with an IC50 of 2.09 μM. Sscopolamine hydrobromide nasal gel is a safe and promising therapeutic alternative to existing medications for motion sickness, it and NaHCO3 can be used to treat tetrodotoxin (TTX) poisoning. Scopolamine hydrobromide (anhydrous) is a hydrobromide that is obtained by reaction of scopolamine with hydrogen bromide. It has a role as a muscarinic antagonist. It contains a scopolamine(1+).