Thanks for your information and service. It is very helpful to us by all means. I need a favour from all of you. I have a son, 4 years old. He has cough for long time. Even I did check up with doctor, it couldn't help. They said it may be allergy(Not exactly). They prescribed Zyrtec for allergy. It tried too. But I am sure, He doesn't have any allergy at all. he has cough more than 6 months, not continuously, weekly once or every 2 weeks once, he used cough, it long last upto 30 minutes, once he did vomit, He will be ok. Initially I thought because of winter he used to have that. But still in summer he has cough. I noticed that he vomit everything with white mucus, not cold mucus(chali - read in tamil) with foam. I couldn't find the reason. Even tried honey, peppar, turmeric in milk. It doesn't work. Please anyone help me to find out the treatment(Home remedy) to him. I can not tolerate his cough. I feel guilty too. Thanks in advance. Waiting for your answers.