Organic chemical compounds based upon the urea molecule are disclosed which have potent gastric secretion inhibitory properties. The urea is substituted with a heterocyclic ring which may be substituted with one or more loweralkyl groups. The urea is also substituted with loweralkyl and a lower-alkylamino loweralkyl group. The compounds have profound effects on the inhibition of gastric secretions in the gastro-intestinal tract, and compositions for such uses are also disclosed.