Mucinex DM User Reviews & Ratings

• HKa...
• Taken for less than 1 month
• March 29, 2018

For Expectoration "I wasn't feeling well, and it was recommended that I try Mucinex DM. I took one 12-hour pill and started to feel better, or so I thought. Halfway through the 12-hour dose, I started to have blurry vision, and I could feel something covering my eye. I went to look at my eye, and I had green mucus coming out of it. First, it was one eye, then it was both. I thought I might have conjunctivitis (pink eye), but once I stopped taking the Mucinex DM, the issue went away. I will never again take this product. Just doesn't work for everyone."

• Jon...
• Taken for less than 1 month
• February 21, 2022

"A guy on here said it made his heart race, which made him use his inhaler? Asthma inhalers can make you jittery, so you literally did the opposite of what you should have done. Another person said something about a flu shot and them telling him the flu symptoms were not related? Come on, the vaccine is a weakened version of the flu, so of course it causes flu symptoms. I wouldn't expect it to do much in that situation, but usually, when experiencing coughing at night, the suppressant is good, and with congested sinuses during the day, the expectorant is good. Check for possible interactions with other meds, hydrate PLENTY, don't just start by taking the highest recommended dosage. This is not a cure for COVID or other viruses, but it can help clear out phlegm. Definitely not for everyone but works for most."

• sus...
• May 1, 2013

For Cough "Took Mucinex at 5 in the afternoon. Around 8, took my night meds. Next morning, stumbling around, body felt like it was flooded with heat-chest and arm pains. Had myself checked out and was ok. Pulled up the website to get a complete list of medicines not to take it with and found my answer there. If you have access to the internet, I would put the OTC medicine in and get a complete list of what not to take it with."

• CJa...
• Taken for less than 1 month
• December 2, 2020

For Expectoration "215 lb. male with head cold/chest cold and extreme congestion. Only used Mucinex for two days during daytime with lots of H2O. Broke all congestion loose, resulting in sinus drainage and productive cough. Great stuff. Made me feel kind of 'buzzy.' I would not recommend mixing with other meds (e.g., Nyquil). This would likely cause adverse reactions. Very important to overhydrate when taking!"

• Sar...
• Taken for less than 1 month
• December 30, 2023

For Expectoration "This medication combines both Dextromethorphan (suppression) and Guaifenenesin (thins mucus). As a result, the ingredients work against one another to a certain extent. Those using it and experiencing adverse effects (dizziness, racing heart rate, panic, etc.) were likely reacting to the Dextro, which triggers many of the issues that are being complained about. So my suggestion is to use Mucinex (plain basic type) first thing in the morning. It lasts for 12 hours and allows your chest to cough up the mucus and clear your lungs. Then at night, use a cough suppressant (not including Guaifenesin) medication that will allow you to sleep and bring the other benefits you seek. Do not blame a product when you have not done your homework! You should consult with the pharmacist if you have any health issues or are likely to experience any drug interactions. Also, do not take the maximum dose unless you discover you need it. Remember dosage levels relate to body weight too!"

• 129...
• November 5, 2014

For Cough "Medicine works very well for the specified 12 hours, but wow, it is very strong. I weigh 105 pounds, and taking an entire pill will have me falling over and seeing double, very shaky also, but giving it a seven because at least I can breathe now, and this is the only medication that works for that, my inhaler won't even help me anymore."

• Mar...
• Taken for less than 1 month
• December 9, 2013

For Cough "I'm nursing a 7-month-old baby. Had a bad sore throat, congested nose. Took Mucinex DM, only 4 doses, and it worked well. No side effects on the baby. I like it and recommend it. The 1st dose made my eyes watery, but then everything went okay."

• Ast...
• Taken for less than 1 month
• September 21, 2016

For Cough "Took Mucinex DM for the onset of cough. The Mucinex the first day I noticed an improvement but had slight trouble sleeping. The second day no improvement from the Mucinex and zero sleep. In combination with my other asthma meds, it made my heart race, which made me have to take a rescue inhaler. I recommend going to the doctor before taking this with asthma patients."

• Bad...
• Taken for less than 1 month
• January 27, 2022

For Cough "(51F) I took two pills of MucinexDM for Covid symptoms, and it didn’t touch my cough or congestion. But, my eyes swelled shut and started leaking copious amounts of green goo, and my pulse was over 100 even at rest. Not a good first experience!"

• Sas...
• Taken for less than 1 month
• November 1, 2019

For Expectoration "While taking Mucinex DM 600mg, twice a day for 7 days, I hadn't realized why I was itching something fierce. Until my 7th day when I looked up the side effects. Absolutely nothing helped to ease the itch all over but scratching. Other than that, my congestion has eased significantly."

• cur...
• October 12, 2019

For Cough "I had flu symptoms after a flu shot. They came on immediately but the pharmacist at Walgreens said that the connection was impossible and recommended Mucinex. It does absolutely nothing to relieve the cough, runny nose or anything. She said that the Nyquil I intended to buy wouldn't work. No more Walgeens or Mucinex for me."

• Ms ...
• Taken for less than 1 month
• January 2, 2022

For Cough "Had chest congestion, stuffy nose and sore throat the instructions recommended 1 or 2 tablets it worked very well. However I'm spitting aqua blue/green saliva??? can't find any reference in my research indicating this being one of the side effects ..."

• Nic...
• Taken for less than 1 month
• May 29, 2023

For Cough "I have a cold with a cough, some post nasal drip, and congestion. I took this before bed hoping to calm the cough and get some of the stuck mucus out of my chest. It did help me suppress the cough, but also made me wake up at 4 am with a panic attack. Fingers tingling, face numb, heart beating crazy fast, and feeling nauseous and dizzy. Unable to fall back asleep. I have had a similar reaction with dextromethorphan before, but not since I was a kid. I don't recommend taking this if you have adverse reactions to sleep medicines or other sedating medication. I often have the opposite effect with those meds, and this was no different."

• Ang...
• Taken for less than 1 month
• November 20, 2024

For Cough "My Dr. prescribed a Z-pack for my head cold. This usually kicks it by day 2. The night before taking my last dose, it returned with a vengeance. My Dr. suggested Mucinex DM. First dose stopped the coughing, by day 2, no more pressure or runny nose. Thanks, Mucinex, for curing my ick!!!"

• Jac...
• October 6, 2019

For Cough "The directions say to take 1 or 2 pills every 12 hours. I took 2 pills and landed in the ER. Very strong meds!"

• kac...
• January 9, 2016

For Expectoration "Horrible side effects. Felt like I was having an anxiety attack."

• Lar...
• Taken for less than 1 month
• April 19, 2021

For Expectoration "Had very bad anxiety during the whole night. Was confused. Heart rate was very high. Palpitation was abnormal. Chest tightness. Cannot sleep. Stomach upset."

• Cec...
• October 20, 2019

For Cough "All this pill does for me is make me really lightheaded and numb all day. I’m never taking Mucinex DM ever again."

• Anonymous
• Taken for less than 1 month
• February 28, 2015

For Cough "This medicine definitely reduced congestion in my nose. I had not been able to breathe out of the right nostril for several days."

• Anonymous
• Taken for less than 1 month
• July 19, 2016

For Expectoration "Inflames BPH, prostate enlargement, raises blood pressure about 20%."

• Daw...
• Taken for 2 to 5 years
• December 28, 2022

For Cough "Fantastic! I panic if I don’t have these in the house. I get a terrible cough 2-3 times a year and this suppresses cough so I can sleep and thins mucus at same time"

• Cyn...
• Taken for less than 1 month
• December 25, 2021

For Cough "Muncinex DX did not work for my son and I. Instead of controlling our cough, we coughed for hours. It did not loosen our mucus as stated on the box. I would not recommend this product."