Hello To me it seems to be primarily Gastroenteritis might be associated with gallbladder disease. Treatment seems okay to me, only thing i would like to change is sompraz 40 or pan 40 instead of sompraz-D. If dehydration take plenty of liquids orally and add ORS Powder or electrol powder If severe dehydration which can be judged clinically, you might need iv fluid. Get your BP and pulse checked And get an ultrasound abdomen done.