My daughter, now 6, has taken Singulair on and off for the last 2...

My daughter, now 6, has taken Singulair on and off for the last 2-3 years for asthma. It works but the side effects are not worth it. My daughter has had encoupresis (severe constipation causing accidents) since starting the drug, as well as mood swings. Because she has also had to take Flovent (also Advair, Pulmicort) and Albuterol we have never been sure which drug was the culprit. We took her off Singulair at the end of the summer in 2006 and kept her on the Flovent and Albuterol (as needed). We got the encoupresis under control and her mood dramatically improved. This January 2007 she started having allergic reactions everyday at school and was going to the school nurse to get Benydryl. We decided to put her back on the Singulair a couple of weeks ago. The encoupresis symptoms have returned and the moodiness is horrible. We are stopping the medicine from now on, does anyone know of an alternative that helps with food, grass and animal allergies??? Thanks for your help.