There are described novel dispersible cimetidine tablets containing 30 to 90 % by weight of one of the polymorphous modifications of cimetidine A, B or C, 5 to 55 % by weight of one or more disintegrationg agents, 0.05 to 5.0 % by weight of a surfactant, such as sodium lauryl sulphate together with other common adjuvants. The process for the manufacture of dispersible cimetidine tablets is effected on the basis of known methods by granulating the ingredients and by compressing the granu-late to ...

There are described novel dispersible cimetidine tablets containing 30 to 90 % by weight of one of the polymorphous modifications of cimetidine A, B or C, 5 to 55 % by weight of one or more disintegrationg agents, 0.05 to 5.0 % by weight of a surfactant, such as sodium lauryl sulphate together with other common adjuvants. The process for the manufacture of dispersible cimetidine tablets is effected on the basis of known methods by granulating the ingredients and by compressing the granulate to t...

A new and simple process for the preparation of crystalline cimetidine (N-cyano-N'-methyl-N''-{2/(5-methyl-1H-imidazole-4-yl)methylthio/ethyl}gu anidine) is described wherein cimetidine is obtained by reacting O-ethyl-S-(4-methylimidazolyl-5-methyl)dithiocarbonate hydrobromide with N-cyano-N'-methyl-N''-(2-chloroethyl)guanidine in an aqueous methylamine solution at a temperature between room temperature and the reflux temperature of the reaction mixture, whereupon the desired compound is separat...

A new, technologically easily feasible process for the preparation of 4(5)-methyl-5(4)-thiomethyl imidazole of the formula and of acid addition salts thereof is described, wherein 4(5)-methyl-5(4)-bromomethyl imidazole hydrobromide is reacted in an aqueous medium at room temperature with potassium O-ethyl dithiocarbonate to the intermediate O-ethyl-S-(4-methylimidazolyl-5-methyl) dithiocarbonate, which is hydrolyzed at the reflux temperature under nitrogen atmosphere with an aqueous HBr ...