Episode Of Diverticulitis. Was Administered 1 Shot Of Rocephin Daily

episode of diverticulitis. was administered 1 shot of rocephin daily for three days. after seven days developed frequent bowel movements. bm consisted of few loose stools. urge to defecate frequent especially after food consumption. no fever. abdominal pain absent (minor bloating in mid abdomen). no gross blood present in loose stools.
drug of choice for relieving diarrhea ? thank you doctor for your point of view.