Thank you everyone for your experiences w/ Singulair. I just took my son (11years) to the doctor today for his allergies and asked about a possible new medication because Zrytec has not been working all that great for him. Well, he gave me samples of Singulair and my son took his first and LAST dose today. He doesn't have asthma but suffers from airborne allergies which are a huge problem here in Texas. I am just going to give him Claritin or another over-the-counter allergy medication. Thank you so much everyone! Oh! With one pill, my son's stomach was really hurting him....never again Singulair!!