Broad-spectrum antimicrobial antidiarrheal useful in infections caused by Gram-positive and Gram-negative microorganisms such as Escherichia coli, Pasteurella spp, Klebsiella spp, Pseudomonas spp, Proteus spp, Campylobacter spp, Vibrio spp, Treponema spp, and Clostridium spp, as well as in some protozoan infections: Trichomonas, Isospora, and Eimeria, mycoplasmas, and rickettsias sensitive to the action of the formula. Specifically used as an adjuvant in the treatment of various diarrheas such as: mechanical viral and bacterial, acute, and in cases where it is desired to reduce intestinal motility.