Suggest Suitable Treatment For Vomiting And School Sickness

Good morning Doctor, I am kiran, My daughter is 5.5 years old. her school reopened on last monday. she has some school sicknees. she is not taking any fluids/food. she has vomiting sensation. that she started vomiting from the empty stomach in early morning itself the vomiting continues followed by stomach pain. she is very tired. i have given domperidone tablet, but the vomiting wont stops, give me suggestion