Singulair and Anger: What Users Say

• San...
• Taken for 1 to 6 months
• April 19, 2020

For Allergic Rhinitis "I was given this medication, Singulair, for chronic nasal congestion and rhinitis. After about 2 months, I started to notice my mood changing. I was more argumentative, almost to the point of aggression. When I started to have bizarre dreams, I then researched the side effects of this drug. Here is what was listed: mental/mood changes (such as agitation, aggression, anxiety, trouble sleeping, abnormal dreams, sleep-walking, memory/attention problems, depression, hallucinations, thoughts of harming yourself/suicide). I immediately stopped taking this medication (it wasn't helping that much anyway) and these side effects have stopped completely. PLEASE be mindful of ALL the side effects of any medications you are taking! I never would have believed that something to help with nasal congestion could cause such problems."

• MM ...
• Taken for 5 to 10 years
• October 10, 2018

For Allergic Rhinitis "I am a parent of two children. Both children took Singulair for allergies. Both children had issues while taking Singulair and experienced withdrawal effects once I stopped the medication. My daughter developed tics, tremors, anger, rage, OCD, anxiety, mood swings, and agitation, to name a few side effects. My son developed frequent urination, muscle issues, joint pain, and sadness. Both my children developed a hypersensitivity to all artificial sweeteners, dyes, and all emulsifiers/preservatives as the inactive ingredients are made up of most of these items. Their hypersensitivity to artificial sweeteners, dyes, and emulsifiers/preservatives still continues even though they stopped the medicine."

• MM ...
• Taken for 5 to 10 years
• October 10, 2018

For Allergic Rhinitis "I am a parent of two children. Both children took Singulair for allergies. Both children had issues while taking Singulair and experienced withdrawal effects once I stopped the medication. My daughter developed tics, tremors, anger, rage, OCD, anxiety, mood swings, and agitation, to name a few side effects. My son developed frequent urination, muscle issues, joint pain, and sadness. Both my children developed a hypersensitivity to all artificial sweeteners, dyes, and all emulsifiers/preservatives as the inactive ingredients are made up of most of these items. Their hypersensitivity to artificial sweeteners, dyes, and emulsifiers/preservatives still continues even though they stopped the medicine."

• Anonymous
• January 6, 2010

For Asthma, Maintenance "My 4-year-old son was on this for a year. It worked wonders for his asthma but made him a very violent and aggressive child. We didn't notice the changes in his behavior until he had been on it for over 6 months. His fits of rage became more and more frequent. We finally decided that we would take him off to see if the Singulair was the cause. We noticed changes in him the first day he was off of it. He is back to being my sweet and loving child with no rage and no violence. It is a great drug for those that don't have this side effect."

• Mom...
• October 13, 2010

For Asthma "My son has had asthma from the beginning, he was placed on Singulair at 18 months. It did seem to help, but he has now developed side effects, and we have taken him off of it. He becomes very agitated and aggressive. He is normally a very calm and sweet child. It took a while to put two and two together. We took him off, and his sweet nature came back. Truthfully, it scared me how much this medicine affected his mood. It works great for asthma, but we won't use it anymore."

• MxV...
• September 5, 2011

For Asthma "I recently was on prednisone for over a week because I could barely breathe (in spite of taking 500 mg of Advair 2/day and Maxair several times a day). Towards the end of my steroids, I was still breathing very poorly, but then I started taking Singulair, and immediately my breathing became absolutely normal with not one hint of wheezing or breathing difficulty. Also, my nasal allergies/sinuses have improved considerably since I started Singulair. On the other hand, I have noticed pain in my ear (possible ear infection), and my mood appears to be a bit more aggressive than it was before taking Singulair. Overall, I would highly recommend it."

• Rev...
• Taken for 6 months to 1 year
• May 2, 2016

For Allergic Rhinitis "Singulair causes symptoms in children that look like ADHD or ADD. It causes irritability, aggression, impulsivity, and hyperactivity in children. Before you treat your child for ADHD, try switching to an allergy or asthma medicine that isn't this or a corticosteroid."

• Sca...
• Taken for 1 to 6 months
• August 13, 2021

For Allergic Rhinitis "If I could give no stars, I would. It caused me to have suicidal thoughts, and I put a fork to my throat this morning over something stupid, and my mom talked me out of it. I’m not the suicidal type, and Singulair made me want to take my life. I also have had aggression, worse depression, rage, and not giving a rat's booty on what I say to anyone. I talked to my mom like she was a nobody, and I’m not that kind of person. I even cussed my own husband out a couple of times. I would NEVER talk to anyone like that! I was literally scared of myself. I even broke something of my great-great-grandmother's, and it was one of the last objects my mom had of hers. I’m not the violent type at all. I’m hoping within a few days I can start feeling better."

• Sca...
• Taken for 1 to 6 months
• August 13, 2021

For Allergic Rhinitis "If I could give no stars, I would. It caused me to have suicidal thoughts, and I put a fork to my throat this morning over something stupid, and my mom talked me out of it. I’m not the suicidal type, and Singulair made me want to take my life. I also have had aggression, worse depression, rage, and not giving a rat's booty on what I say to anyone. I talked to my mom like she was a nobody, and I’m not that kind of person. I even cussed my own husband out a couple of times. I would NEVER talk to anyone like that! I was literally scared of myself. I even broke something of my great-great-grandmother's, and it was one of the last objects my mom had of hers. I’m not the violent type at all. I’m hoping within a few days I can start feeling better."

• Sca...
• Taken for 1 to 6 months
• August 13, 2021

For Allergic Rhinitis "If I could give no stars, I would. It caused me to have suicidal thoughts, and I put a fork to my throat this morning over something stupid, and my mom talked me out of it. I’m not the suicidal type, and Singulair made me want to take my life. I also have had aggression, worse depression, rage, and not giving a rat's booty on what I say to anyone. I talked to my mom like she was a nobody, and I’m not that kind of person. I even cussed my own husband out a couple of times. I would NEVER talk to anyone like that! I was literally scared of myself. I even broke something of my great-great-grandmother's, and it was one of the last objects my mom had of hers. I’m not the violent type at all. I’m hoping within a few days I can start feeling better."

• Lor...
• Taken for 6 months to 1 year
• March 21, 2023

"When my doctor prescribed Singulair for my headaches and heaviness in the right side of my head, at first it took my headaches away with one pill a day. I loved it. Then one day I woke up and I felt like I had dementia. I couldn't even go get something to drink because I kept forgetting what I got up for over and over. Then the anger and rage came next, and I got madder than I have ever been in my life over nothing, and I became scared to be alone 'cause I could not control myself from getting so angry. I was so messed up that when I would take a shower, I could not remember what I was doing, so I kept bathing over and over when I meant to wash and condition my hair. After I stopped taking the Singulair, 30 days later, I could not remember how I used to be before I had the anger issues. Today I still deal with anger issues even though I have not taken Singulair in almost 2 years. I'm afraid it will never go away. However, I am grateful that my memory issues have improved."

• Lor...
• Taken for 6 months to 1 year
• March 21, 2023

"When my doctor prescribed Singulair for my headaches and heaviness in the right side of my head, at first it took my headaches away with one pill a day. I loved it. Then one day I woke up and I felt like I had dementia. I couldn't even go get something to drink because I kept forgetting what I got up for over and over. Then the anger and rage came next, and I got madder than I have ever been in my life over nothing, and I became scared to be alone 'cause I could not control myself from getting so angry. I was so messed up that when I would take a shower, I could not remember what I was doing, so I kept bathing over and over when I meant to wash and condition my hair. After I stopped taking the Singulair, 30 days later, I could not remember how I used to be before I had the anger issues. Today I still deal with anger issues even though I have not taken Singulair in almost 2 years. I'm afraid it will never go away. However, I am grateful that my memory issues have improved."

• pre...
• Taken for less than 1 month
• January 21, 2013

For Asthma "Very good for asthma and allergies, but my mood changed for the worse. I woke up angry for no reason and very irritable. Made my anxiety worse too. I stopped it."

• Anonymous
• November 9, 2009

For Asthma "Great for the asthma, bad for the mood. Cleared up the runny nose and the cough. Started to make me think of some very bad things. I was getting angry with everyone over relatively anything."

• Chr...
• Taken for less than 1 month
• June 3, 2023

For Asthma, Maintenance "I only took Singulair for a couple of days because of the terrible side effects. Nightmares, sadness, aggression, feelings of emptiness, heart palpitations, etc. Singulair is poisonous garbage."

• Mik...
• Taken for 2 to 5 years
• April 2, 2017

For Asthma "Caused severe anger and self-control issues in my son."