Timepidium bromide (

INN Inns are generally establishments or buildings where travelers can seek lodging, and usually, food and drink. Inns are typically located in the country or along a highway. Before the advent of motorized transportation, they also provided accomm ...

) is an

anticholinergic Anticholinergics (anticholinergic agents) are substances that block the action of the acetylcholine (ACh) neurotransmitter at synapses in the central nervous system, central and peripheral nervous system. These agents inhibit the parasympatheti ...

. It is used in the symptomatic treatment of visceral spasms. It is also used to relieve pain associated with various gastrointestinal disorders. The quaternary nitrogen prevents it from crossing the

blood brain barrier Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells, and transports metabolic waste products away from those same cells. Blood is compo ...

, so it is peripherally acting with no central side effects. The same compound ''sans'' the quaternary methyl group and the methoxy ether is called

tipepidine Tipepidine (International Nonproprietary Name, INN; also known as tipepidine hibenzate (Japanese Accepted Name, JAN); brand names Asverin, Antupex, Asvelik, Asvex, Bitiodin, Cofdenin A, Hustel, Nodal, and Sotal) is a Organic compound#Synthetic co ...

References

Alkene derivatives Bromides Ethers M1 receptor antagonists M2 receptor antagonists M3 receptor antagonists M4 receptor antagonists M5 receptor antagonists Peripherally selective drugs Piperidines Quaternary ammonium compounds Thiophenes {{gastrointestinal-drug-stub