Hi, Dr. My son, 2 years and 9 months, is having cough for over a week. Not the whole day, but after sunset. No sign of fever. Based on the past treatment, we use asthalin nebulizer solution twice, 2 dose each time. After each nebulization, the child do stop coughing. We also consult a doctor and he prescribed some cough syrup and an antibiotic. But all these are not helping. What should we do now?