Suggest Home Remedy For Diarrhea

Hi sir, My son is 16 months old, from yesterday morning he is suffering from loose motion, he passed 4 times ( watery) yesterday . Today from morning he passed motion 4 times ( watery). Yesterday we went to doctor, Doctor preciscribed the tablet ONDANSETRON 4 mg ODT TAB MYLAN , one - half tablet in mouth, three times daily as needed. Please say me some home remedies, what food & juice we can give it to him?