Hi. Thanks for your query. Noted the history and understood the concerns. Since your daughter is one and half years old and has started with fever and vomiting followed by loose motions, this looks to be gastroenteritis. The obvious cause can be viral or bacterial and this can be diagnosed by the following ways: Get an opinion of a Pediatrician for clinical evaluation, examination and investigations of stool, blood and urine to get a probable diagnosis so that the cause can be fund out. The symptomatic treatment will be in the form of anti-emetic to stop vomiting, once the vomiting stops then oral rehydration and electrolyte replacement; antipyretic for fever and antibiotic if there is a bacterial infection. Continue the treatment till she is cured. Also watch for the source of infection from food or water source, utensils, watch for baby putting toys or anything in mouth which is a common source of intestinal infection in pediatric age group.