Orbitals symptoms and conditions

Update.... well my 6yr old son came off Singulair on 3-29. His sinuses drained finally (only waiting past year for that to happen) 9 days after coming off. His sinus problems have been gradually going away. He is now only taking claritin and sudafed when absolutely needed. BUT he started with sore throats. He never had a problem with tonsils only adenoids which they took out in Feb. Now since stopping the Singulair his tonsils have become constantly infected and twice the size so he will be having them removed in July. Some of the antibiotic don't seem to be working as he has been on them so much over past year. Im wondering if the Singulair was hiding the fact there was a problem with the tonsils as well.