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+).