Cough and fever pls advise for quick relif…. age 21 month

Patient: Hi need advice for cough and fever,my kid is 21 months old, suffering from fever and cold from last 3 days, we have givencrocin sypalkof junior syp.augmed 225.5 (bottle)Cetrizin sypfor 2 days, today is 3rd day but not much improvement, now he is coughing frequently and having difficulties while sleeping and eating. pls advise some good medicines for instant relief at least from cough

Symptoms: Coughing, light fever.. running nose