Singulair 4mg symptoms and conditions

I have two children on singular as of September 07. When my 6 year old was an infant he was always congested, we changed his formula a couple of times until the doctor decided to do a blood test to check for allergies and the results came back as an allergy to milk. He then started to have sinus infections and had to have his tonsils and adenoids removed. The surgeon said the coughing and the snoring would stop after surgery but it didn't. I was having problems with seasonal allergies myself and was put on Allegra and Veramist so I decided to take him to the allergist as well. He was tested and was also found to have seasonal allergies. Within a day or two after taking the Singulair 4mg chewable tablets he started sleeping through the night with no coughing or sneezing in the middle of the night. My friend just recently had a similar problem with her daughter who is around ten years old. She was found to have asthma but the inhalers that she was put on didn't completely work, so the doctor put her on singulair and her mother said the Singulair is the best. My 14 year old son also has food and seasonal allergies and takes Singulair but not on a daily basis only as needed and he doesn't have any problems.