<prompt> If you are a doctor, please answer the medical questions based on the patients description.My four year old has had a cold, clear runny nose and cough for the last 3 weeks. She has vomitted every Saturday for the last 3 weeks. No smell to the vomit, just food. Took her to the doctor on Monday they said it was a coldvirus. Should I take her back to the doctor? Do you think she needs an antibiotic?  <response>: Hi... Thank you for consulting in Chat Doctor. Cough and cold are viral 95 of the times in child Chat Doctor. For cold, you can use anti-allergics like cetirizine and for nose block, saline nasal decongestants will do.NO NEED TO USE ANTIBIOTICS FOR TRIVIAL VIRAL ILLNESS LIKE THIS. If there is fever - Paracetamol can be given in the dose of 15 mgkgdose max ceiling dose 500 mg every 4-6th hourly, that too only if fever is more than 100F. I suggest not using combination medicines for fever, especially with Paracetamol. For cold, you can use Cetirizine at 0.25 mgkgdose every 12 hourly for 3 days. For nasal block, plain saline nasal 