Singulair and family history

My eight year old son, who has asthma and has been taking Singulair since he was three, has been off Singulair for four days and is becoming a completely different little boy! He has always been a "difficult child" with intense emotional reactions to things, anxiety, oppositional behavior, a short fuse and bad temper. He has also displayed obsessive/compulsive behavior. His father and I never thought that his behaviors and symptoms were caused by Singulair. His pediatrician never suggested it. With a family history of anxiety, we just assumed it was the way he was. At four, his preschool requested he be tested for ADHD. The testing revealed a short attention span but not a diagnosis of ADHD. As he got older his symptoms grew more intense. Last year we considered taking him to a psychiatrist but decided to "wait it out" one more year to see if maturity would bring an end to some of the behaviors. It didn't and in fact they grew worse. He became aggressive, explosive and depressed.

I recently began taking Singulair for another medical condition and had noticed that it made me a little moody. Last week, on the verge of making an appointment for my son with a psychiatrist, I started to wonder if maybe he was reacting in a similar, yet more intense way to the Singulair. I reviewed the patient information on line (I had read the patient info for Singulair when my son started taking it, but had not done so in years. I learned a tough lesson: check the information that accompanies prescriptions each and every time I get a refill.) When I read what the "less common side effects" were I was convinced that my son was reacting to his medicine. Then I found this website. We stopped his Singulair immediately and within two days began seeing a dramatic change in our son. He was less high strung, defiant, and explosive. Yesterday we had a cookout with some friends and he played with other kids all day without fighting for the first time in his life! He even cooperated when we asked him to help us get ready for company.

I strongly believe that this medicine should not be given to children and teens. I am so upset that when I asked my son's pediatricians about his behavior TWICE last year, they never mentioned that Singulair could be the problem. I called today to tell them he wasn't taking it anymore and the nurse said that she would note that he is "allergic" to it in his chart!

We are exploring alternate and natural ways to treat our son's asthma. I will NEVER give him Singulair again!

FYI: the labeling for his albuterol inhaler states that "safety and efficacy have not been established in patients under 12 years old". His pediatrician has been prescribing albuterol inhalers since he was three!

Does anyone have information about herbal inhalers and naturopathic treatment of asthma? If so I would like to hear.

I have stated many times that I am not an expert. I just post what I find. This has been a mind boggling journey for me. This is way over my head but I struggle to read and understand. Finding answers to why children are suffering from neuro-psychiatric side effects is worth the effort.

I have made the following observations.

1. Some quinoline are known to be able to cross the blood brain barrier.
2. Molecules that ionize are known to be more likely to be able to cross cell membranes. So if montelukast ionizes as a result of change in blood pH to sufficient acid conditions that it ionizes, then it could be possible or maybe like that it does in fact cross the blood brain barrier.
3. We know that there are cysLT1 receptors in the brain.
4. We know that researchers believe that montelukast may bind at the arginine of the cysLT1 receptor.
5. We know that arginine contains four nitrogens. And montelukast contains one.
6. We don't know what happens to those nitrogens.
7. We do know what macrophages create nitric oxide as I posted.
8. We do know that if something cause excessive nitric oxide to build in the brain that there would be damage to the neurons.

Some people may remember when I got stuck at the astrocytes, the cysLT1 receptors and glutamate. I keep looking for research reports that may shed more light on this.

Titre du document / Document title
Nitric oxide causes glutamate release from brain synaptosomes
Auteur(s) / Author(s)
MCNAUGHT K. S. P. (1) ; BROWN G. C. (1) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) Department of Biochemistry, University of Cambridge, Cambridge, ROYAUME-UNI
Résumé / Abstract
We determined the ability of pathological levels of nitric oxide (NO) to cause glutamate release from isolated rat brain nerve terminals using a fluorometric assay. It was found that NO (0.7 and 2 μM) produced (4 and 10 nmol/mg of synaptosomal protein) Ca2+-independent glutamate release from synaptosomes (after 1 min of exposure). Spermine/NO complex (spermine NONOate; a slow NO donor) and potassium cyanide (an inhibitor of cytochrome oxidase) also caused Ca2+-independent glutamate release. Preincubation of synaptosomes with 5 μM 1H- oxadiazole quinoxalin-1-one (an inhibitor of soluble guanylyl cyclase) had no effect on NO-induced Ca2+-independent glutamate release. Ca2+-independent glutamate release produced by NO was greater in a low-oxygen medium. NO, spermine NONOate, and potassium cyanide inhibited synaptosomal respiration with a similar order of potency with respect to their ability to cause glutamate release. Because NO has been shown previously to inhibit reversibly cytochrome oxidase in competition with oxygen, our findings in this study suggest that NO (and cyanide) causes glutamate release following inhibition of mitochondrial respiration at the level of cytochrome oxidase. Thus, elevated NO production leading to mitochondrial dysfunction, glutamate release, and excitotoxicty may contribute to neuronal death in neurological diseases.
Revue / Journal Title
Journal of neurochemistry ISSN 0022-3042 CODEN JONRA9
Source / Source
1998, vol. 70, no4, pp. 1541-1546 (29 ref.)

INIST-CNRS, Cote INIST : 4037, 35400007527188.0230

Unfortunately my lawyer told me that they do not want to take our case because of the lack of evidence that Singulair has caused our daughters problems. :(

Does anyone out there have a pending class action lawsuit that We may be able to get in on? I have tons of proof that Singulair has caused our daughters problems and loss of almost 5 years of her elementary school career!

My phone number is *** and my email is ****** if You email me please put "Singulair" in Your subject line so I know it pertains to this posting.

Thank You in advance,
Chuck & Brenda
Jamestown New York

Our son started taking Singulair when he was 2 for severe allergic rhinitis and cough variant asthma (in addition to Zyrtec, which didn’t control all of his symptoms). He is 5 now. For the last three years, he has been an increasingly violent, difficult, defiant, argumentative, volatile child who has intense mood swings--one minute he’s laughing uncontrollably, the next he’s weeping over nothing. His doctor and therapist recommended that we see a psychiatrist to have him evaluated for bipolar disorder, which used to be unknown in children. Because he has such chronic sleep problems, the doctor also suggested we take him off Singulair (and increase his Zyrtec dose) to see if it improved his sleep issues. Within a week, he was sleeping much better and was a calmer, happier, gentler boy. He suddenly could take “no” for an answer without flipping out and trying to hurt me. We thought that we were just in an unusual, calm window that would shift either to mania or intense sadness or both, any minute. We also thought that his behavior change might be due to sleeping better. We were enjoying the rare reprieve. Over the last weekend, his springtime allergies really flared up. We gave him Singulair on Monday and by noon, he was completely out of control. I had to strap him into his car seat at one point to keep him from hurting either me or himself. It finally occurred to me that Singulair might be causing his “bipolar” disorder. Of course, we stopped the Singulair. After two days he was a new boy. Yesterday, I Googled “Singulair bipolar children” and got a few hits. I am stunned to read how similar other families’ experiences have been to ours and I feel sick that we gave this drug to our child for three years.

I noticed a lot of postings about weight gain on Singulair, which is nowhere listed by Merck as a possible side effect. My 15 y.o. daughter experienced sudden weight gain at the age of 9 when she was actually underweight (BMI went from 17 to 21). To make a long story short, after being off Singulair for over a year, she is now over-weight, and diet/exercise have never made a big difference (gymnastics, swim team, figure skating, trampoline, etc.) Extensive labwork is always normal & there is no family history of obesity. It's a shame the quality of life of a child is RUINED by a drug that is deemed to have "no side effects", and the many drs. & specialists out there take it very lightly. We continually worry about our daughter's self-esteem, risk of diabetes, and other complications from weight gain which is not hereditary and goes on unexplained by the drug co. Reversing this weight gain has been nearly impossible. Everytime I hear a news report about our children being overweight and obese, it makes me angry because I think about the many kids that are taking this highly prescribed drug (for even the mildest allergy or asthma) and who knows how many parents don't make the connection!

I think that I can get my head around certain things and try to explain to you that medications do not work for all people or affect all people the same way. Well, that sounds simple enough to say - DUH. But, it is actually quite complicated chemically. Human beings are not chemically the same because we have variations in our genes. Would you be surprised to learn that about 60% of adverse drug reactions involve certain chemicals (in some cases enzymes) that we already know what these chemicals or enzymes are and what the variants are among populations groups? Some times we can predict who would have an adverse reaction to what medications if we knew what gene subgroup the patient was part of. We could also predict whether the patient would metabolize a drug at the same speed as others or not. Metabolize means utilize the drug and then discard the by-products--mostly the liver is the recycling center of chemical waste. Anything that the liver cannot re-use, the kidneys gets rid of in the urine. Speed of metabolism is a very important thing because people who are slow metabolizers might actually experience over-dose. There are other differences caused by genes that can cause different reactions according to the individual person.

I am interesting in following this site because I am wondering if the concept is flawed meaning that other parts of the body were ignored at the expense of controlling asthma and allergies of the nasal passages and lungs. OR - is there just a problem that relates to genetic differences in something such as enzymes and certain populations groups do just fine on Singulair with no problems and other people have some awful problems?

This isn't my area. But, sadly, if I can spend two weeks looking at this and come up with at least a road map of what I am looking for to answer some important questions then people who do this for Merck already know the answers. Why do I say that? Because, the adverse side effects (major categories) correspond to important areas of leukotriene receptor location and activity. Maybe not necessarily this receptor but part of a chemical process that involves this receptor.

The bottom line is that Singulair is the wrong medication for anyone that has adverse reactions. OR, there is a problem regarding the dosage that involves how fast the patient metabolizes the medication. Considering that there is a link to psychiatric adverse drugs reactions in Singulair and some medications for depression are linked to differences in metabolism due to enzymes, then there could be possibly something important to be learned from Singulair adverse drug reactions.

The biggest problem is that pharmaceutical companies are not properly communicating with the doctors who prescribe their medications. Why not communicate to doctors to look out for side effects and be aware that there are gene variations among people that are directly linked to how the patient might respond to the medication?

What happens if the patient belongs to the gene group that will have problems? If the pharm company does not tell the doctor to be on the alert, then the doctor tells the patient that it is not the drug that is causing the problem. Then the gene groups with the problems, go on the war path.

Hi All! So glad to read of all the "happiness" since off of singulair. My 2 sons and I are off for a week now and what a difference. My 6 year old is back to his old self. He is much happier and is laughing a lot and not throwing angry tantrums. My 8 year old feels much better as well. He is much calmer and has had only one outburst in a week compared to daily. I can't wait to see if he can come off of ADHD meds too. I feel much more laid back. I thought my mood swings were hormonal but since I have had a hysterectomy, I thought they should subside. My estrogen level seems good but I just thought I was being female! I can tell a difference now and I feel better. I am getting along with just my asmanex for now. I wonder if the singulair really even helped me at all. I had a little tightness the first few days but now I feel just like I did on the singulair. To me this med is just not worth the risk. We have no family history of ADHD or depression so I wondered why my boys had the thoughts and symptoms they did. Singulair was the only drug my youngest was on so I know his symptoms came from that. Good luck to everyone and thanks for the posts!

I'm 22 years old. I've been on Singulair for about 5 years. I have stomach pains and mood swings frequently. As soon as I heard the news about depression and suicide I stopped taking it. I have a family history of depression and suicide so I don't need anything helping it out. I thought the mood swings were just from my hormones... guess not. I have not felt much of a change yet. I've been off the med sinceThursday.

IA huge thanks to you guys for putting this info out there, because I'm sure the Singulair website wouldn't go into detail about this, and tell about side effects it has: FYI -->

This was what I found on the Singulair website, no more, no less (see post below this one please)

'm really sad to hear that these things happened to you guys and your children.

My 8yr old (55 lbs) son got a cough that ended up lasting about 4 weeks, so i finally took him to his pediatrician. He gave him a breathing treatment and hinted at him having asthma- but he wasn't sure. We have no family history of asthma and in my mind i thought it was pretty far fetched, but we continued the breathing treatment for about 2 weeks and my son cleared right up.

We came back in the Friday after Thanksgiving for a check up and his doctor said that my son sounded much better. The doctor said that looking over my son's medical history (not much of anything) he said he could have asthma-but he wanted to put him on Singulair for the next 3 months until the winter is over.

He said it would be a preventative measure to keep my son's symptoms from "flaring" up. The doctors said " This is not a steroid, and there are NO side effects. Its a once daily chew able for children." I thought-hmmm that's a first, a drug with no side effects. Then I was thinking" "What symptoms was the doctor referring to?" He had a really bad cough he got while visiting his dad's family (bug going around). But I held my tongue and just nodded. He wrote out the prescription, and I left. I heisted as I pulled out in front of the pharmacy and then kept driving.

I felt uneasy about the whole thing. Giving him a daily medication for a condition (asthma) I doubted my son had. Glad I did my homework, I decided to not fill the prescription. I don't feel the least bit guilty for not giving him the meds.

My 8yo son has been on Singulair for his asthma for about 2 weeks and he has complained of a 'sick tummy' regularly, ending up in tears because he can't do things. We have had a long run of this, perhaps due to the 8 lots of penicillin for tonsillitis, and some tummy bugs going around the schools I work in. The doctor has been suggesting irritable bowel syndrome so we didn't think of the Singulair side effects until it has got so bad that he is not going to school.He has been unusually clingy and almost paranoid about small things that don't usually worry him over the past couple of weeks. We were trying these tablets as he has been on steroid based preventer since he was 3 and we wanted to get him off the cortisone stuff. After reading here he is off the Singulair today and we will report the side effects to the paediatrician.

This is all very interesting, but it's all anecdotal! Can you PROVE that Singulair is responsible for all this stuff?

What other meds are you all taking? In what doses? Under what conditions? Do you have a family history of ? Are you under stress? Or are at least SOME of you just hypochondriacs who, reading this stuff, say to yourself, "Say, I get headaches -- sure, it's gotta be the Singulair!" C'mon, now -- hair loss?!

I've been taking Singulair for over 10 months, and if I'd been as damaged as you all, I think I'd know it.

Without rigourous medical studies to show what is REALLY going on, you lot are just gossipping.

This site is obviously trolling for a class-action suit.