Diarrhea is one of the leading cause of child death worldwide. Rotavirus is the main cause of acute childhood diarrhea. Antibiotics are not given for child patients with acute diarrhea except the etiology is bacterial infection. The research aims to know the rationality of antibiotic usage in child patients with acute diarrhea in X private clinic in Pekanbaru on January 1st - December 31st 2015…