Drug Ratings for SINGULAIR

Average Rating: 2.1 (1145 Ratings)

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    Charts & graphs: Reviews Summary for SINGULAIR  | Top 10 Adverse Effects (reported to FDA)

RATING  REASONSIDE EFFECTS FOR SINGULAIRCOMMENTSSEXAGEDURATION/
DOSAGE
DATE ADDED
sort down sort up F  M  
 2  Environmental Allergies Facial and vocal tics. My daughter first used montelukast on and off for a year and then continuously everyday for a month and a half. First, we noticed blinking, then nodding. Then when she was using the meds everyday for about 45 days, she developed horrendously grotesque mouth contortions and hard eye blinking. It was disturbing and alarming to watch. We thought she had tourets syndrome. We did not make the connection until we ran out of meds and didn't refill the script for almost 2 months over the summer. Her tics went away. Most recently, our daughter's allergies flared up again and so on Monday we began giving her the montelukast again. Today, she started with the nodding and blinking tics once again. It has to be this medication. F 10 4 days
1 tablet/d
10/1/2014

 4  Asthma Sleepy, dizzy. Transient. I was told to take this drug at bedtime for those reasons. I haven't noticed anxiety, depression. Or any more nightmares than my usual, what I do experience is the tightness in my chest disappears within about an hour. The inhaled steroid beclomethasone doesn't seem to do much for me. I'm told to use it anyway, which I do. I'm 60, working nurse, have cats and a dog. I walk every day in the woods near me. So, my experience with singulair has been pos! I use albuterol once a month. Montelukast has been kind of a miracle drug for me. F 2 years
10 1X D
9/23/2014

 2  Allergies, Asthma Anxiety, depression, irritability, bloating/swelling of abdominal area, loss of appetite, RLS, insomnia This is my second round of trying Singulair (trying to replace Claritin and steroid nasal sprays...Just "because"). This is my LAST time trying Singulair. I am a grown woman, albeit quite petite, and two days after my first dose I was angry, depressed, my moods were all over the place - I'm ashamed to say that I even contemplated suicide. BEWARE!!! For me, the cons absolutely outweigh the pros. I'll keep on using an antihistamine and Nasonex, thank you very much. F 40 6 days
30mg 1X D
9/10/2014

 2  Asthma and allergies Helped with asthma and found it had more impact than regular steroid inhalers for me. But I started having terrible night terrors where I would wake up in a fright and sometimes find myself on the other side of the bedroom. I stopped taking the singulair and they stopped. I can't say for sure whether the two were linked but they seemed to be. I would like to take it again to help my asthma but the night terrors were too bad. F 35 2 months
10mg
8/25/2014

 1  middle ear fluid, allergies Mood altering, disconnected with world, depressed, unable to focus, lightheadedness My doctor added Singulair to my allergy regimen as I complained of lightheadedness and middle ear fluid. I took this for just over a month with NO success in helping my lightheadedness. If anything, it INCREASED it and then affected my mood. Before taking Singulair, I scoffed at the idea that a medicine for something like allergies could really affect your mood/way you thought. Boy was I wrong. This drug really altered my state my mind, to that point where I cried in front of mirror screaming "what is F*ing wrong with me! Why can't I snap out of this! I can't go on like this!" I was SO scary. I didn't connect the mood change with the drug until I read about the side effects. My doctor NEVER told me about any mood side effects. The bottle does state this, but again, I was a believer that it was probably so rare that I shouldn't worry. :( PLEASE, if you took this medicine and your state of mind is dramatically different than normal, tell your Doctor and stop taking. Within two days, I felt much better, though my ears are still clogged daily. F 28 45 days
1X D
8/9/2014
Email
 5  severe asthma none without this medication, i don't get enough oxygen to stay alert, always yawning, can't speak or do any physical activity without breathing hard; have to take my emergency inhaler multiple times a day (which is ineffective), and the damage that was being caused to my lungs from constant wheezing was always increasing. This medicine gave me my life back 13 years ago and today I can run half marathons, play wind instruments----etc do whatever I like with no problems or fear of not being able to breathe. Any day i miss a pill the terrible inability to breathe comes back. I attribute my life as I know it, and being able to do the things I love to do, to this pill. F 22 13 years
1X D
8/1/2014

 1  asthma/allergies My son had been complaining of night mares, very scared at night when left alone in the bedroom to the extent I or my husband will put him to sleep every night, very disturbed sleep,very sensitive,cries for every little thing, lately expressed that he will die first than us his parents,very restless when sitting on a chair he will keep moving his legs or arms and said cant help himself and lots of stomach aches. It just donned on me now when I put everything together what Ive seen in my son and reading all the comments. It just scare me to death that I'm putting my son in this situation. Definitely, I will be stopping this medicine not to let my son take it. I will let his allergist know tomorrow. It is so sad that nothing has been mentioned in the leaflet with regards to this drug side effects. M 8 4 years
5mg 1X D
7/27/2014

 1  Allergies My daughter's personality changed completely starting at about the 2nd month. She became hostile, easily angered, stopped playing and would cry about every little think. She had terrible fear of everything and anxiety attacks. She would fear when I left the house and would no longer stay overnight at her grandmas house which was always her favorite thing to do. It was so worrisome. Then I looked up the side effects of singular and took her off it immediately. You need to also go to the FDA sight and make a complaint. Never give your child this medicine. She also had daily headaches and hot flashes. F 10 3 months
2mg 1X D
7/23/2014
Email
 4  Asthma & allergies Joint pain in my knees and ankles, disconcerting dreams (odd dreams not scary), light headache, mild neck and back pain (could be attributed to tension in sleep due to the unusual dreams). Felt the effect of my bronchial airways opening up 30 minutes after I took my first pill and was astounded and thrilled - an hour after I took the pill I could not stay awake and that night I had my first odd dream (odd dreams each of the 5 nights on 10mg). The meds also alleviated my allergies and was able to smell (sinuses opened) but I was dizzy the next day and very tired. Three days later started feeling achy in my knees. Two days later (5 days on the pills total) having problems going up and down stairs due to my knee joint pain, also have aches begin in my ankles plus mild head ache and light neck/back pain. At this point I halved my dose to 5mg. So far the joint paint is almost negligible (14 days total), dreams less odd still mild neck/back pain which is slowly lessening but I still find within an hour of taking my pill I am tranquilized and want to sleep; however, now I can fight it and stay awake and it does pass after about 10 minutes (at 10 mg was not able to stay awake). I take my pill at night so I just take it 30 minutes before bed so I don't have to fight the drowsiness it brings. My bronchial airways are still open and my sinuses are better than when on an antihistamine and cortisol steroid inhaler combo regimen. I am a bit tired during the day but I can accept this, the odd dreams, and the minor aches and pains since I can breathe again. I have not had to use my rescue inhaler once in the last 2 weeks. F 48 14 days
10mg 1X D
7/8/2014
Email
 5  Asthma Twitching eye lids every day. Insomnia for the first few days, but this has now passed. Singulair (or Montelukast Sodium as we call it in New Zealand) has given me my life back. For the past year I have had a cough and wheezing that would not go away. I have been on steroid tablets and three different puffers just to be able to breathe - and all I have done is breathe since any activity caused me to have really bad attacks. My Dr prescribed me Singluair as a last resort since every time I was due to have a Saline Challenge for a proper diagnosis, I would get some sort of chest infection and so a diagnosis was just impossible. Within a few days of starting my cough just stopped. Another couple of days and my wheeze stopped. I no longer feel like someone is permanently holding my chest in a vice. I can live with the twitching because breathing is far more important to me and I can not tell you how good it is to be able to go outside and play with my kids again. F 42 14 days
10mg 1X D
6/25/2014
Email
 2  Costochrondritis/Asthma Insomnia, acid reflux, stomach pain I am a person who has had trouble taking the steroids for asthma. The doctor knows I have trouble with stomach pain from drugs, since I have GERD, which I treat by avoiding some trigger foods and sleeping on a wedge. I took my first dose last night, and it took 1 hour to fall asleep. No weird dreams, but in the morning, I woke up 1.5 hours early because of the pain. Even antacids could not take the pain away. It seems that Singulair is yet another drug to add to the long list of drugs I cannot use. Judging by the side effects I read here, that may not be an entirely bad thing. While I took it, I didn't notice any improvement. Found it rather tough to breath, and my nose felt stuffy. F 40 1 days
10 1X D
6/19/2014

 1   Singulair Generic Name: montelukast Montelukast is a CysLT1 antagonist; it blocks the action of leukotriene D4 (and secondary ligands LTC4 and LTE4) on the cysteinyl leukotriene receptor CysLT1 in the lungs and bronchial tubes by binding to it. The cysteinyl leukotrienes LTC4, LTD4, and LTE4 are important mediators of human bronchial asthma. Leukotriene D4 is one of the leukotrienes. Its functions in the body are bronchoconstriction, vasoconstriction, contraction of smooth muscle, and increasing vascular permeability. Other leukotrienes that function in a similar manner are leukotrienes C4 and E4. Studies have suggested that LTE4 works through its own distinct receptor, and although one has not yet been discovered, research is ongoing to isolated and characterize an LTE4-specific receptor.[ Why would you allow a receptor to be Blocked when we don't even know what it is ? DON"T USE THIS DRUG Singulair Generic Name: montelukast Montelukast is a CysLT1 antagonist; it blocks the action of leukotriene D4 (and secondary ligands LTC4 and LTE4) on the cysteinyl leukotriene receptor CysLT1 in the lungs and bronchial tubes by binding to it. The cysteinyl leukotrienes LTC4, LTD4, and LTE4 are important mediators of human bronchial asthma. Leukotriene D4 is one of the leukotrienes. Its functions in the body are bronchoconstriction, vasoconstriction, contraction of smooth muscle, and increasing vascular permeability. Other leukotrienes that function in a similar manner are leukotrienes C4 and E4. Studies have suggested that LTE4 works through its own distinct receptor, and although one has not yet been discovered, research is ongoing to isolated and characterize an LTE4-specific receptor.[ Why would you allow a receptor to be Blocked when we don't even know what it is ? M 17
1X D
6/6/2014

 1  Allergy/tingling cheeks DO NOT TAKE THIS &#!@. Cant believe this crap is out there. I developed uncontrollable muscle twitching and pins an needles all over my body an aches everywhere not taking anymor of this crap. Twitching as I type this. M 26 2 weeks
10mg
6/5/2014
Email
 3  allergies and sinus infection Initially I went to sleep but awakened and couldn't sleep for hours F 51 4 days
6/3/2014

 1  allergies loss of appetite, nausea, stomach pains, insomnia, interrupted sleep, anxiety, pain and weakness in arm, fatigue, headaches, feeling disconnected, heat flashes, dizziness, aggression, deppression It's working wonders for my allergies, but with my side effects and seeing all these negative reviews I think I'll see about switching to something else! F 20 6 days
10 mg 1X D
5/21/2014
Email
 4  Asthma I am taking the generic of Singular, (Montelukast). Initially it seemed to be working OK, but for the past few weeks have had muscle pain in my lower back that made it hard to walk, but eventually that weakened and was better. I thought that this was the Magic Bullet for Asthma, since initially all my Asthma symptoms disappeared. It was only after taking it for somewhat over a month that these lower back pains surfaced. I bought a massage pad to help alleviate the problem, but it keeps recurring. I am on the verge of discontinuing since it causes pain each and every day especially in morning. I am taking Aleve twice a day and that seems to help. I was taking Statins in the past, and that also caused serious muscle aches that went away after I stopped. Hope the pain goes away after I stop taking Montelukast. M 80 50 days
10 MG 1X D
5/13/2014
Email
 1  Asthma and allergies Gross edema (swelling) pain, Uncoordination and tremors. Mainly swelling. Still having it 5 days after stopping. It's significant though slightly better today (I've been taking Lasix to get rid of the swelling). I had a major work project (show) during this and I was swollen everywhere. Only had swelling twice in my life, both from allergic reactions. Three drs said this is not an allergic reaction but a side effect F 41 4 days
Once a day
5/1/2014
Email
 1  allergies vocal and motor tics its a horrible drug and they dont mention tics when they perscribe it and the bottle does not say anything about ticks and guess what neather does the paperwork you get with the medicine its crazy there trying to make this otc i wish someone/allot of people would get together and file a suit against them for selling something and not labeling it the dr had no clue but the hospital was like oh yeah she's on sigulair thats a possible side effect stop taking it well my now 9 year old still has the tics cant go to a movie gets bitched at by teachers and guides on fieldtrips etc i took her off the meds and the tics have gotten a lil better but its still a daily problem for her and just sad that she didnt have this problem and now she does and the company who makes the drug takes no responsibility 9
1X D
4/30/2014
Email
 1  Asthma This is the second time I tried this medication with the results of immediate depression and anxiety. Nightmare last night was it for me. Will not take it again F 60 3 days
30 mg
4/30/2014

 1  Allergies Not sure if it was due to singulair but my daughter took 1 dose, that night I researched the drug as I always do when Dr. Prescribes something for my children, after reading about side effects I decided not worth keeping her on it to see if she would get them, day or so after the dose she suddenly wanted to quit gymnastics team she's been on for three years, when asked why she would say I don't know and start crying, one dose seems very small to cause symptoms but I really am wondering if possible, it's been about a week since she has taken it and yesterday she seemed happy after gymnastics class, anyone else notice symptoms after only 1 dose? F 12 1 days
5mg
4/27/2014
Email
 3  Asthma, Allergies, MCS Over the last several years I had been experiencing lower back and hip pain, which I attributed to age. I have also over the last two years tried to reduce the medication I am on during the winter (I live in the north east) while allergens are low. I have stopped taking singulair over the winter two years in a row and stopped and started recently to test my theory, While I am not taking sinuglair I have no lower back or hip pain it is only when I return to taking it does my lower back and hip pain return. I also have noticed I experience muscle aches and spasms in my lower legs in the morning while I am taking singulair. Unfortunately I will have to stop taking it for these reasons. It did seem to help my allergies and asthma in the past but the side effects of the pain doesn't warrant my continuing it. No Additional comments F 50 16 years
10 1X D
4/26/2014
Email
 3  Allergies and asthma Oddly, my son has episodes of night terrors as well. I never thought of it possibly being related to the singulair until reading the other posts! M 9 10 days
30 mg
4/22/2014
Email
 1  Asthma I definitely urge parents not to take this medicine. My daughter is 3 years old and was given this occasionally when she had asthma. Maybe like 3 times year, for a short duration of 4 days. Recently, the doctor gave her this again for 4 days. Today is the 5th day that she has withdrawn from the medicine yet it has changed her personality completely. She has become aggressive and screams that she wants to throw out her favourite teddy bear in the garbage. It's scary. As you can see no kid in the right state of mind would ever suggest this. She was not joking, she was serious about it. My worst experience are the night terrors. At first she will kick and scream about opening the door for 10 minutes, now her episodes last for 30 minutes. It is very frightening to watch. I don't know when the side effects will wear off. I miss having a sweet and happy kid. F 3 4 days
4mg
4/10/2014

 1  seasonal allergies, rhinitis anxiety, depression, insomnia, isolation, panic attacks, She did take this for two years with no issues but once put back on it a year later things took a scary turn. I am posting this on behalf of my then 10 year old daughter who began taking Singulair (brand) at about age 7 until age 9 and then put her back on it at age 10 for about 16 days. After about three weeks, my daughter came home a completely different person. It was as if a light switch had gone on or off. She had anxiety at a level I've never experienced, panic attacks, feelings of throat tightening which I believe was a byproduct of the anxiety. Since, this was so sudden and not gradual I had to ask myself what had changed. I realized that she had just began taking the generic Singulair and stopped immediately and took her to the pediatrician for confirmation that it was the right thing to do (honestly, I would have done it with or without the doctors permission) This occurred on June 13, 2013 and within about 3 weeks we saw marked improvement and also had began seeing a counselor and doing a LOT of cognitive behavior therapy on a minute by minute basis. This was a happy go lucky, goofy, playful, funny, smart, outgoing child that retreated to her room and was in a panic when I was not near here. I literally slept in her room for 2 weeks. She would cry for no reason and stopped eating - lost about 7 pounds. It was quite possibly the most frightening time in my life and obviously hers. She has rebounded well but I do see some residual effects quite possibly because of the memory of how she felt. I would NEVER recommend taking this medication and especially not fo F 10 2 years
5mg 1X D
4/2/2014
Email
 1  asthma mental tics, depression, anxiety, high blood pressure, stomach pain, back pain, itching, inability to focus, insomnia, headaches, diarrhea, obsessions Within days of stopping the montelukast, my negative side effects began to rapidly go away. M 22 10 months
10 1X D
3/26/2014

 2  Asthma & mast cell activation disor Ear pain, upper back & chest pain (quite strong), sour stomache, sneezing fits, itchiness. F 49 4 days
10 mg
3/25/2014
Email
 2  allergies The worst insomnia imaginable(it's 5:01 as I write this and I've been trying to sleep since 10:30p), and a fatigue headache to match. Pretty much unbearable. Have noticed slight reduction in allergies but not enough to rival the sleep loss. Oh well. Might also mention I am taking the generic form of the drug. F 21 6 months
10mg
3/24/2014

 1  recurrent chest infections My 2y old son went from being normal 2yr old with the usual moods to a child with no interest in playing, aggressive `I'm cross and angry`, 3hr tantrums. He was like a different child.He no longer needed steroids but did still need ventolin. We got to a point when we couldn't cope and stopped montelukast. Within 3 days our happy playful little boy was back - singing and not being cross. Now is a normal 2yr old having tantrums still but 10mins not 3hrs. He's not going back on it. We felt awful for having put him through it. He couldn't express what was wrong so we don't know if it was psychological or physical. M 2 6 weeks
3/10/2014

 1  Asthma Non stop headaches, feeling faint, suicidal thoughts and a little itching Doctor though i had asthma so i was perscribed Montelkulast ( singulair) i have chronic phlegm that i have had for 2 years and i have bad panic attacks... im 17 and on the 3rd day i experience itching and a non stop headache that hasnt left since... my suicidal thoughts have included jumping out of the window or over dosing on medication.. I wont commit suicide or want to at all so i find it weird to have such dark thoughts... M 17 4 days
2 x 5mg 2X D
3/9/2014
Email
 1  Acute rhinitis Depression, thoughts about death, anxiety, sweats, heart pounding to just name a few! I know it is this drug as I didn't have ANY of these symptoms before I took that one pill. I am so glad I found this site. I thought I was loosing my mind. I will never take it again. F 44 1 days
3/9/2014

 3  Severe Allergies I never had any side effects while taking Singulair but since CVS/Caremark changed to the generic brand Montelukast, I have had many symptoms. Depression, suicidal thoughts, mood swings, anxiety which I have never had in my life, crying, night sweats, dizziness, frustration, trouble concentrating and numbness. I thought the symptoms were due to me being pre menopause but my suicidal thoughts are so bad I think it may be from the generic brand. I stopped taking it last night and I'm going to see what happens. I'm nervous about my allergies now because Singulair helped me for years, but I can't put my family through these mood swings anymore. F 47 5 years
10mg 1X D
3/8/2014
Email
 2  Allergies/chronic sinusitis After hearing from friends this drug did wonders for allergies, I decided to consult with my dr and began taking singulair. The first few days I noticed runny nose (which wasn't a usual symptom and sore throat). I have ulcerative colitis and receive remicade immune suppressing infusion every 8 weeks. Since having an immune disease and chronic sisusitus I wasn't surprised by the immediate onset of a sinus cold, but noticed the unusual runny nose. Shortly after I felt much better. Then I soon realized I had mistakenly left singulair out of my pill container upon refilling....i didn't notice until 5 or so missed doses. So I went back on it thinking it was unrelated and the symptoms immediately returned and worsened. I've noticed insomnia is also an issue (it is 2:30 am as I write this). My throat pain is immense and head hurts soooo bad and now it seems I have the onset of an ear infection. Not happy and stopped taking this drug 2 nights ago. I also noticed some red itchy blotches early today. Not fun. Would definitely not recommend it to anyone with non related heath issues. Thankfully no signs of depression. F 38 1 weeks
1
3/8/2014

 2  Asthma Nightmares/ night terrors, insomnia, depression, anxiety, irritability, suicidal thoughts, cramps, tremors, dry mouth, sore throat, headache, It did do wonders for my asthma, so I stopped and restarted it several times. When I stopped, the side effects went away, but returned as soon as I restarted. F 44 1 years
10mg 1X D
2/12/2014

 5  Asthma/Allergies None Completely unblocked my nose so I could breathe again. Asthma issues were gone, never had to use rescue inhaler. Helped tremendously with allergy issues. F 25 1 years
10MG 1X D
1/18/2014

 1  Allergies/Asthma I'm a sound sleeper ordinarily, and I had horrible violent night terrors that would jolt me out of bed. My doctor suggested adjusting the time of the day that I was taking it, and it didn't help. I came across these pills last night and decided to try one, not remembering if this was the medicine that caused the nightmares (I've tried a lot of different asthma meds), and I had night terrors once again. I could see the bad dreams leading to poor sleep habits and fatigue. And I see on this site folks talking about tingling hands and feet; that's indicative of hyperventilation from anxiety. I'm not taking this anymore. We have a drop box for unused prescription meds here in my town, and that's where this bottle is headed. F 38 2 weeks
10 MG
1/2/2014

 1  allergies My 4 year old daughter took this medicine. Sleeplessness, nightmares, complaining of monsters in her bedroom, extreme anxiety, mood swings, glazed disconnected look in her eyes at times, anger, aggression, destructiveness. It was like she was possessed. She's been off this for two months. The symptoms have almost all disappeared. This drug needs to be banned. These dangerous side effects are ruining children and families. This was the only drug my daughter was on. She had no control over her behavior and was diagnosed as having a mood disorder. She was put on antipsychotic medicine at the age of 4! I stopped those medicines shortly after I stopped the Singulair. The behaviors have almost all disappeared. F 49 11 months
4 mg 1X D
12/10/2013

 2  Allergies Did give me some relief with the internal swelling in my head and chest. Until the muscular cramping started. M 41 5 days
30 1X D
12/3/2013

 4  astma chronic coughing He has less coughing, sleepyness, he ha been using it since he was two. Without it it is non stop coughing. M 8 1 days
4mg
11/24/2013

 1  Severe allergies Worked great on allergies from the 1st day Wow I thought great than the ball dropped Severe severe leg and foot and thigh cramps sleep interrupted and nausea Would handle the sleep and the nausea Can NOT handle the cramping F 70 10 days
10
10/26/2013

 3  Asthma Symptoms of allergies and asthma have abated, which is good. However, depression and crying and thoughts of dying or never even being born have come up frequently. This last time has been the most severe and my son will not be taking another dose. Weighing benefits and side effects is up to the individual. A 9 year old is not mentally strong enough to fight depression. M 9 3 months
5mg 1X D
10/7/2013
Email
 1  Allergies My daughter is 3, after 1 week of taking this, she began bed wetting which she had never done, was seeing people who were not there, woke up screaming from nightmares that she said a man was trying to take her away, and worst of all last night she woke up screaming hysterically and was like this 4 hours, saying get them off spiders and other things were crawling on her and were getting her, she is. Ow scared of the dark, won't sleep. Even all day has said things were crawling on her. Scary to think our next 2 weeks may be like this paranoia schizophrenia episodes. And wonder the lasting mental scars it will leave for such a young child. My daughter has taken Singulair for the last 2 weeks and it has helped her symptoms of allergies greatly, it does not offset the extreme side effects it caused. F 3 2 weeks
4mg 1X D
9/25/2013

 1  Asthma Mood swing, depressed, severe joint pain, tendonitis, irritability, easily angered, crazy dreams, insomona, unable to function at times. F 26 3 years
10
9/24/2013
Email
 5  rhinitis Sleeplessness and vivid dreams, switched from night to morning dosing and side effects eliminated probably due to peak serum effect occurring during the day instead at night. Allergies well controlled and sleeping much improved due to a reduction of sleep apnea snoring. M 75 60 days
10 mg 1X D
9/12/2013

 1  Asthma Extreme aggression. On behalf of my son. He stopped this drug nearly 2 years ago, but is still very aggressive. Before singulair, there was no aggression at all. He is being checked out for residual damage from singulair. M 8 6 months
5mg 1X D
9/8/2013

 1  Itchy eyelids, skin allergies Within 1 hour of taking 1 pill I became extremely nauseous. It lasted about 2 hours. I was pleased to find this website, but greatly concerned about all the effects others are reporting. I will NOT be taking this drug again. F 45 1 days
1xD
9/5/2013
Email
 4  Asthma Works well for my asthma. Recently switched to the generic. Was fine with Teva generic and now experiencing headaches with the Glenmark generic. Don't know what could be different but I get cluster headaches within an hour of the dosage. Want regular Singulair back. F 28 7 years
10 mg
9/4/2013

 1  Allergies I experienced weight gain, libido loss, depression, anxiety, suicidal thoughts(which I've never had before), apathy, angst, distraction, forgetfulness, hate and anger. It severely messed with my marriage and ability to be a good mother. I became unable to function normally. This is the drug from hell. F 37 3 months
10 mg
8/31/2013
Email
 1  Rhinitis I am in the UK and was given this drugby my allergist. After taking it for 4 weeks, I began to feel very depressed and asked my allergist if I could stop it. She was quite bullying and insisted I stay on it, which I did. The last 5 months have been sheer hell! I needed emergency care from my GP after becoming suicidal (so bad that I was almost institutionalised for my safety), and was also now having varicella spots breaking out on my arms and side. My GP told me to stop the drug IMMEDIATELY! No amount of rhinitis symptom relief is worth the sheer hell I. have been through on this drug! F 44 5 months
10mg
8/19/2013

 1  Allergies/Asthma After 4 days I felt as if I became extremely aggressive, agitated at everything and everyone, verge of losing patience at everyone, for no reason at all. This is not how I behave at all. Scary. Scary. Stay away from this drug. Also had insomnia, and even with a prescription sleeping pill had trouble sleeping, heart racing. awful. This drug is the worse drug I have ever been prescribed. Awful experience. F 44 4 days
10 1X D
8/11/2013
Email
 5  asthma and nasal congestion None Took the drug for asthma. After taking it for a couple weeks I suddenly noticed I could smell again, chronic nasal congestion was significantly reduced. Use of asthma inhalers reduced dramatically -- I now use an inhaler about a dozen times a year or less. M 65 6 years
10 mg 1X D
7/24/2013

 5  seasonal allergies none wonder drug for me, for my whole life i stayed inside during the late summer until it frosted. singulair is the ONLY medication i have ever taken that has worked for me M 63 5 years
1X D
6/2/2013

 5  Asthma None on Brand Singulair. Once switched to generic all symptoms returned. Told by pharmacy that the manufacturer has quit making brand since losing patent. Very frustrating F 55 6 years
10 mg 1X D
5/28/2013

 5  Seasonal asthma None Wonderful medicine. Totally erased my seasonal asthma. I can now breathe! M 64 1 months
10 MG 1X D
5/25/2013
Email
 2  allergy & exercise induced asthma Dreams, interrupted sleep, concentration problems, feeling gloomy, feeling disconnected, lack of caring, thoughts of dying, muscle and joint pain. Though my breathing difficulties and chest tightness did improve with this medication, the side effects started right away and worsened quickly each day. I was willing to keep taking it to see if side effects might subside, but on day 4 the muscle and joint pain during and after exercising was excruciating. I apparently just cannot tolerate this drug. F 52 4 days
10mg 1X D
5/20/2013

 1  COPD and Asthma Extreme Anger all the time. Was never able to stop feeling mad., became abusive towards my wife, which is totally opposite for me. felt like I had hate in my heart and also became very selfish. Blood pressure ALWAYS higher than before. Insomnia that even sleeping pills couldn't cure. M 52 9 months
5/15/2013

 1  Severe Asthma Bed Wetting Night Sweats Bad Dreams Depression Anger Wants to be alone Not Social Cries that I will leave him for good Lashes out for no reason Somedays no emotion Spacey Lost *** this all started in the last 7 months Bad Moody swings my son is not himself I don't know if its this med or Zyrtec but I'm removing him from this med. I've questioned it 3 yrs ago when a friend told me her daughter was being suicidal M 5 3 years
4mg
5/14/2013

 1  severe allergies insomnia Claritin and Veramyst used to control my allergies. But this year pollen was so bad I developed bronchitis. So the doctor gave me an inhaler and singulair. After the second sleepless night I started reading this site. I have no desire to find out if I will develop other side effects and I am discontinuing. F 43 2 days
10 mg 1X D
5/9/2013

 1  Sinus Night mares , crying , mood changes , crying a lot M 2 2 weeks
Granuals
5/7/2013

 1  Allergies I began having sternum pain. Then my elbows, knees, back, and hips started hurting. I thought I was getting arthritis or fibromyalgia. Finally, I realized I had just started a new medication. Pain subsided less than a week after I stopped taking the medicine. F 32 3 weeks
5/4/2013

 4  Severe allergies Absence of stuffy nose. Yay!! F 30 2 weeks
10mg
4/26/2013

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