Someone had take little qantity of insecticide.and he's vomiting frothy.that right to give him some milk?or water is better before going to hospital?

Call poison control: Accidental ingestions of insecticides can vary from mild to life threatening. The decision whether to give milk or water before going to the emergency room is dependent upon the exact insecticide ingested. Your local poison control center can quickly give you the most accurate information. That's the best way to make sure you are helping and not making things worse.