http://www.medications.com/effect/view/21572 My daughter is 5 years old and has been on singulair for 1 week. i have already noticed a dramatic change in her behavior. she has become irritable, mean, nasty, and emotional. she has had me in tears on a daily basis. she has turned into a monster. we will Tue, 15 May 2007 19:27:43 -0400 http://www.medications.com/effect/view/21572?item=109 My son was also put on singulair last spring at the age of 5 for allergies and asthma, immediately he was having behavior problems, as soon as we stopped the singulair the behavior problems went away. We changed him back to claritin, with no adverse sympt http://www.medications.com/effect/view/21572?item=109 Wed, 16 May 2007 09:19:21 -0400 http://www.medications.com/effect/view/21572?item=119 They could be acting aggressive because Singulair makes you tired.Maybe they're sleepy?My son has taken Singulair for about two years now and he's starting to get nosebleeds.Someone told me it is a blood thinner.Have you heard of this? http://www.medications.com/effect/view/21572?item=119 Wed, 16 May 2007 09:47:43 -0400 http://www.medications.com/effect/view/21572?item=120 be very careful with the medication. My sone was on it for 3 months, his behaviour changed extremely! he became agressive, started having temper tantrums, night mares, frequent urination etc. It was so hard for him and me and my husband. I am so thankful t http://www.medications.com/effect/view/21572?item=120 Thu, 17 May 2007 06:21:48 -0400 http://www.medications.com/effect/view/21572?item=130 I don't think it is due to singulair. I've been on it for 8 years and it hasn't affected my personality at all. I have had no side affects what so ever. My daughter also has a 5 year old and she is acting the same way and doesn't take singulair. She http://www.medications.com/effect/view/21572?item=130 Thu, 17 May 2007 06:28:14 -0400 http://www.medications.com/effect/view/21572?item=131 I forgot to edit this, sorry for this mis-spelling here it is revised I don't think it is due to singulair. I've been on it for 8 years and it hasn't affected my personality at all. I have had no side affects what so ever. My daughter also has a 5 ye http://www.medications.com/effect/view/21572?item=131 Thu, 17 May 2007 19:44:37 -0400 http://www.medications.com/effect/view/21572?item=144 to MRANCH my daughter does not go to any school. she is not in the prescence of ill discliplined children. my child is not normally a child with monster like qualities. there are too many coincidences and everyone reacts to meds differently. adults defi http://www.medications.com/effect/view/21572?item=144 Sat, 19 May 2007 09:48:19 -0400 http://www.medications.com/effect/view/21572?item=152 http://www.medications.com/effect/view/21572?item=152 Sat, 19 May 2007 09:53:30 -0400 http://www.medications.com/effect/view/21572?item=153 my son has been on singulair for 3 yrs and initially i noticed a change in behavior but it worked so well for his allergies/ear infections. my son is going to be seven and he has been in trouble for his behavior in school yet gets all A's in academics. i http://www.medications.com/effect/view/21572?item=153 Mon, 21 May 2007 07:22:55 -0400 http://www.medications.com/effect/view/21572?item=172 My son is four yrs old, he was recently put on this medication. We have always been complimented on how well behaved our son is and how mild mannered. He is very good. I have three kids and I would have to say he is the most passive and mild mannered of http://www.medications.com/effect/view/21572?item=172 Wed, 23 May 2007 06:21:15 -0400 http://www.medications.com/effect/view/21572?item=202 Hi, I read your comment and wante to oppose you - just because you have been on the drug for 8 years with no side effects, unfortuately it doesnot mean there are no side effects! How would you explain the drastic behaviour in kids during Singulair ther http://www.medications.com/effect/view/21572?item=202 Wed, 23 May 2007 06:22:47 -0400 http://www.medications.com/effect/view/21572?item=203 To: vincinikki this is exactly what happened to our 4 year old during 3 months he was udner Singulair. About 2 weeks after we stopped giving him S things went back to normal. It is a scary drug. http://www.medications.com/effect/view/21572?item=203 Sun, 27 May 2007 13:20:33 -0400 http://www.medications.com/effect/view/21572?item=252 I have a 5 year old daughter who has been on Zyrtec now added Singulair with pulmacort too. She started the singulair on April 21 st. She has had nothing but bad reports from pre-K about not setting still and not listening etc etc. I definitely do not c http://www.medications.com/effect/view/21572?item=252 Tue, 29 May 2007 16:07:02 -0400 http://www.medications.com/effect/view/21572?item=278 You know, I am starting to think that this is also happening to my 4 year old son!! As soon as we put him on this medication, he has been very unbearable! You cant even take him out in public anymore! He was on it a couple of years ago and it did the sa http://www.medications.com/effect/view/21572?item=278 Wed, 30 May 2007 18:47:56 -0400 http://www.medications.com/effect/view/21572?item=295 Allie is on Zyrtec, Rhinocort and Albuterol along with the Singulair. I am sure that the Singulair is causing her adverse behavior. I have taken her off of it and she changed dramatically overnight. I haven't had anything but the normal issues since. We ar http://www.medications.com/effect/view/21572?item=295 Wed, 20 Jun 2007 18:48:56 -0400 http://www.medications.com/effect/view/21572?item=481 My son is 3 years old and I give him singulair during the times of the year when his asthma is very bad. It helps a lot. I have noticed no change in his behavior. He is a very good kid. However, I did read the label and it says it contains aspartame wh http://www.medications.com/effect/view/21572?item=481 Mon, 25 Jun 2007 01:18:23 -0400 http://www.medications.com/effect/view/21572?item=535 I have read all of these posts and I do not know why anyone would post their opinion if they haven't shared this experience especially telling concerned parents to squirt vinegar at their children who are taking a medicine prescribed to them that may be ma http://www.medications.com/effect/view/21572?item=535 Fri, 29 Jun 2007 18:40:09 -0400 http://www.medications.com/effect/view/21572?item=590 My daughter (4.5 yrs old) has had unspecified allergies as long as I can remember. At 9 months, she began taking Tannafed (which is pretty much same as Zyrtec but also contains a decongestant). About a year ago, she actually had an anaphylactic reaction- http://www.medications.com/effect/view/21572?item=590 Sun, 29 Jul 2007 18:02:08 -0400 http://www.medications.com/effect/view/21572?item=943 I am suspect of Zyrtec as well. When allergy season is at its peak, my 5-year-old son takes it and has behavioral problems (most of which revolve around not being able to stay still, and he normally has a freakishly long attention span for his age). His http://www.medications.com/effect/view/21572?item=943 Thu, 06 Sep 2007 14:39:29 -0400 http://www.medications.com/effect/view/21572?item=1645 My 5 year old has had some of the same effects. Did you take your off? Did her "normal" disposition return? http://www.medications.com/effect/view/21572?item=1645 Mon, 10 Sep 2007 10:51:33 -0400 http://www.medications.com/effect/view/21572?item=1714 My son was put on Singulair at age 3. Our happy child turned into an anxiety- ridden, aggressive, miserable little boy.His personality changed completely. We began having problems with him at home, daycare, preschool, kindergarten... We went to therapy. http://www.medications.com/effect/view/21572?item=1714 Mon, 01 Oct 2007 07:55:00 -0400 http://www.medications.com/effect/view/21572?item=2159 I am so glad I found this web site. My 5 year old daughter is taking Singulair for about 6 weeks now and was on it about a year ago. I could not remember why I stopped it last year, but now I clearly remember. First and foremost, she wakes up during the http://www.medications.com/effect/view/21572?item=2159 Wed, 07 Nov 2007 20:59:58 -0500 http://www.medications.com/effect/view/21572?item=2789 My daughter is also 5 years old and was on Singulair she also turned into a little monster and had all off the same side effect she was no longer my sweet lovable little girl. I took her off the medicine and called my Doctor and she didn't feel it was the http://www.medications.com/effect/view/21572?item=2789 Thu, 15 Nov 2007 16:26:24 -0500 http://www.medications.com/effect/view/21572?item=2941 My 3 and 1/2 year old boy has been on Singulair for 6 months. The past 2 weeks he has been aggressive, irritable and has had problems with attention span at his pre-school. He has also started bed wetting and complaining of tummy aches, something he has n http://www.medications.com/effect/view/21572?item=2941 Fri, 23 Nov 2007 20:04:31 -0500 http://www.medications.com/effect/view/21572?item=3056 I am so excited to have found this site. My 2 year old daughter was just put on Singulair last week and she is so irritable and emotional and a bit crazed. We kept writing it off on lack of sleep due to asthma coughs, terrible 2s, or some such thing, but http://www.medications.com/effect/view/21572?item=3056 Thu, 06 Dec 2007 15:21:45 -0500 http://www.medications.com/effect/view/21572?item=3290 I know this site is discussing Singular affects... we have not used this drug... we are actually having issues we believe with advair hfa inhaler. We have been using this for my 4.5 year old daughter's allergy induced asthma. She had been taking flovent http://www.medications.com/effect/view/21572?item=3290 Fri, 14 Mar 2008 00:29:24 -0400 http://www.medications.com/effect/view/21572?item=5521 It is important to remember that from a medical stand point children are not just little adults. Medications and substances that our bodies seem to be able to handle affect these little guys very differently. A pediatric nurse talked to me extensively ab http://www.medications.com/effect/view/21572?item=5521 Fri, 28 Mar 2008 07:42:34 -0400 http://www.medications.com/effect/view/21572?item=5965 Just this morning 3/28/08 I read an article in the newspaper consumer section indicating that this drug could be related to suicide. It also went on to say that the FDA is reviewing a " handful of reports involving mood changes, suicidal behavior and suid http://www.medications.com/effect/view/21572?item=5965 Sun, 30 Mar 2008 00:17:12 -0400 http://www.medications.com/effect/view/21572?item=6192 My ten year old just had allergy testing on Wend. It is now Sat. She started Singulair Wend. Eve. She is complaining of the iching of her arms. Still from the skin tests? She has also been moody...to tears at times. I thought it was hormonal changes, becau http://www.medications.com/effect/view/21572?item=6192 Sun, 30 Mar 2008 23:47:18 -0400 http://www.medications.com/effect/view/21572?item=6270 Did you ever figure this out? My son is currently on Singulair and we are experiencing the same problems. I'd love to know what happened with you. Thanks.' Carol http://www.medications.com/effect/view/21572?item=6270 Mon, 31 Mar 2008 18:51:37 -0400 http://www.medications.com/effect/view/21572?item=6318 My 6 yr old has been on Singulair every year during springtime allergies for 3 yrs. It is a season we dread every year for the fear of the behavior issues we face. He is on so many drugs (Flonase, Singulair, Zyrtec, Flovent, Albuterol) that we just assumed http://www.medications.com/effect/view/21572?item=6318 Wed, 02 Apr 2008 16:12:25 -0400 http://www.medications.com/effect/view/21572?item=6500 My child is not on singulair, but my cousin is. He is has been on it for 5 years now. He has been in and out of mental instititions for his temper and aggressive behavior toward everyone around him. He is always saying he is going to kill himself or run aw http://www.medications.com/effect/view/21572?item=6500 Wed, 02 Apr 2008 16:15:24 -0400 http://www.medications.com/effect/view/21572?item=6501 My aunt called the doctor and she was told to go to Merck.com look for the number and call them. Here is the number for people that have not already called and need answers now!! 908-423-1000 http://www.medications.com/effect/view/21572?item=6501 Fri, 04 Apr 2008 13:54:43 -0400 http://www.medications.com/effect/view/21572?item=6653 My son has just turned 2. He has been on Singular for almost a year. He is a very active little boy, does not listen when he is being disciplined . Since his personality has been developing alot over the past year it is hard for me to determine if the S http://www.medications.com/effect/view/21572?item=6653 Sun, 22 Jun 2008 20:40:41 -0400 http://www.medications.com/effect/view/21572?item=9403 I have a 5r-yr. old son on Singulair and has been on it for 2 months. After about the 1st month i noticed a change inhis behavior,(tempertantrums, fisting,etc..). Now it seems to have escalated to him saying nobody loves me, I,m a bad boy, you hate me and http://www.medications.com/effect/view/21572?item=9403 Mon, 15 Sep 2008 20:43:35 -0400 http://www.medications.com/effect/view/21572?item=12379 My son is 4 years old and has been taking Singulair since he was at least 2 years old. Around that same time his little sister was born so I thought that his change in behavior was because of terrible 2's and a new sister to compete with. He is so awful at http://www.medications.com/effect/view/21572?item=12379 Tue, 30 Sep 2008 08:56:22 -0400 http://www.medications.com/effect/view/21572?item=12939 These coincidences are just too uncanny for me to ignore. My ENT put my daughter on Singulair when she was 2.5, after she had tubes put in her ears for repeated ear infections. He said that while it was for asthma, it was proven effective for upper respe http://www.medications.com/effect/view/21572?item=12939 Thu, 02 Oct 2008 01:11:52 -0400 http://www.medications.com/effect/view/21572?item=13021 My daughter is 7. She has had asthma since she was three. The pulmonologist wanted to put her on singular many times but I always refused because of all the side effect I read. In the meantime her asthma got worst, she get sick every other week and in o http://www.medications.com/effect/view/21572?item=13021 Thu, 23 Oct 2008 15:44:51 -0400 http://www.medications.com/effect/view/21572?item=13755 This is really scary! My son was exhibiting behavior issues at school that were beyond me. They were describing him as being very aggressive towards his teachers and having tantrums and not listening and hurting himself by not watching where he was going http://www.medications.com/effect/view/21572?item=13755 Wed, 19 Nov 2008 16:48:28 -0500 http://www.medications.com/effect/view/21572?item=14664 I've stumbled across this site after being at my wit's end with my daughter - she has exactly the same symptoms as all of the other children described on here. She's 5 and has recently completely changed personality. She was on the Monteleukast powder an http://www.medications.com/effect/view/21572?item=14664 Mon, 15 Dec 2008 11:22:19 -0500 http://www.medications.com/effect/view/21572?item=15257 I am so glad I found this site. My daughter is 4 and I give her Zyrtec every day for her allergies. Her Dr. changed her to Singulair to see if it would help her better. She was on Singulair for 1 week. Oh my gosh... It didn't help her at all. It made her s http://www.medications.com/effect/view/21572?item=15257 Fri, 19 Dec 2008 13:59:41 -0500 http://www.medications.com/effect/view/21572?item=15382 My daughter is almost 10 and was placed in this medication the last part of November. She took the Singulair for 13 days when I had to stop it. She went from a happy go-lucky child to a child that couldn't stop crying. She kept telling me she was afraid http://www.medications.com/effect/view/21572?item=15382 Fri, 30 Jan 2009 14:47:13 -0500 http://www.medications.com/effect/view/21572?item=16593 He was placed on Singulair end of Aug/ early Sep. We thought "WOW! This is really helping him". HOWEVER....his personality slowly began to change. He went from this loving, happy little boy that loved school to this very angry, aggressive boy who hated sch http://www.medications.com/effect/view/21572?item=16593 Wed, 04 Feb 2009 23:36:48 -0500 http://www.medications.com/effect/view/21572?item=16769 Thank you to all that are willing to help others that are having problems and suspect the medication. My son has been on Singulair for almost 3 years, with a few breaks at off peak allergy seasons. He always suffered with allergy related issues, it tires http://www.medications.com/effect/view/21572?item=16769 Mon, 13 Apr 2009 21:19:48 -0400 http://www.medications.com/effect/view/21572?item=18854 my daughter took it when she was three for one week and began peeing on herself we took her off of it and she stopped. Then we tried again six months later started peeing on herself again so we took her off again. When she was almost 7 we put her on it aga http://www.medications.com/effect/view/21572?item=18854 Wed, 06 May 2009 23:31:26 -0400 http://www.medications.com/effect/view/21572?item=19578 Wow, I cannot believe I found this site! My son is just 9 months old and has been on Singular for about 3 months now. He has been waking up in the middle of the night screaming for about two weeks now. It breaks my heart because he cannot tell me what's wr http://www.medications.com/effect/view/21572?item=19578