Algin 50 ml Syrup is an antispasmodic medication containing Tiemonium Methylsulphate, a synthetic quaternary ammonium compound. It acts as a competitive antagonist of acetylcholine and histamine, strengthening calcium bonds with membrane phospholipids and proteins. This mechanism inhibits intracellular contractile proteins in visceral cells, leading to the relaxation of smooth muscles and alleviating visceral spasms and associated pain