My 3 year old son has had many sinus problems over the past two y...

My 3 year old son has had many sinus problems over the past two years. He had his tonsils out last August along with tubes in his ears and removal of his adenoids. He still has constant drainage from his eyes and nose so he has been on Zyrtec for about a year without any side effects. About 3 weeks ago his ENT suggested singulair to help with all the sinus drainage that just won't go away. I just related it to a number of problems he has experienced in the past 3 weeks. My son has delayed speach and does not communicate well. He kept complaining of a tummy ache and we went to our family practitioner and "it's just a stomach bug". I also noticed that he has been waking up during the night and getting into bed with us. I know he has been having more dreams, but He is not able to tell us if they are nightmares. Just tonight when I was putting him in the bathI noticed a rash around the base of his penis and he would scream if we tried to examine him. I am sure that it is Candida Albicans and that is when I googled Singulair and Candidiasis and found all the other side affects that are on this site and others.