Hii dear i read ur son's problem of difficulty in breathing through nose.u also told that he snores at night but not loudly.
U taken two weeks treament for this (monteleukast). First of all u go for some investigation.
1-GBP(GENERAL BLOOD PICTURE)
2-
CXR PA VIEW
3-ESR
TAKE SOME CHANGES IN THE LIFE STYLE-
1-USE ONLY BOIL WATER IN UR SON LIFE STYLE.
2-AVOID
COLD FOOD AND DRINKS ,DONOT TAKE COLD WATER.
3-U CAN GIVE HOT MILK MIXED WITH ZINZER,TULSI EXTRACT(5 DROPS),KALI MIRCH(POWDER). THIS GIVE TWICE IN A DAY.
4-U CAN TAKE GUDUCHI SATVA 250mg With HONEY.
5-U CAN TAKE AYURVEDIC MEDICINE VASAVALEHA HALF TEASPOON WITH MILK.
6-Apply tiel tel mixed with salt (150mg) and lightly heat then apply on chest.
7-u can take chavanprash and makes ur son healthy.
Thanks for query.