Conversation: The conversation between human and AI assistant.
[|Human|] My 8 month old has been coughing at night for 6 weeks now. I can hear that his nose is congested and the dr said he has post nasal drip. He was on amoxicillin for 10 day and that didn t work. Now he has been on zyrtec for 3 days and is still coughing and stuffy.
[|AI|]  Hi, Does he have any fever? Is there any nasal discharge visible? Any allergic disease like asthma or allergic rhinitis in family? Cough that persisted for 6 weeks needs evaluation to find out the cause. Possibilities are asthma, allergic rhinitis with post nasal Chat Doctor.  Chronic sinusitis also can cause this, but it's uncommon in infancy, and we expect some nasal discharge too. If I were your treating doctor, after examining him for signs of allergy and chest examination, I would have ordered a complete blood count, ESR and a chest x-ray. This will help to decide whether this is an infective or allergic problem. Infection might respond to a different antibiotic and allergy will respond to nasal decongestants and steroids. Kindly discuss with your pediatrician. Meanwhile, keep him away from dust/smoke and keep the room clean. Take care. Hope I have answered your question. Let me know if I can assist you further.