Mucinex Insomnia Side Effect Reports


The following Mucinex Insomnia side effect reports were submitted by healthcare professionals and consumers.

This information will help you understand how side effects, such as Insomnia, can occur, and what you can do about them.

A side effect could appear soon after you start Mucinex or it might take time to develop.


Restlessness, Psychomotor Hyperactivity, Tremor, Insomnia, Flatulence

This Insomnia side effect was reported by a consumer or non-health professional from US. A 75-year-old female patient (weight:NA) experienced the following symptoms/conditions: cough. The patient was prescribed Mucinex Dm Maximum Strength (dosage: Patient Last Took On 06-feb-2014), which was started on Feb 05, 2014. Concurrently used drugs: NA. When starting to take Mucinex Dm Maximum Strength the consumer reported the following symptoms:
  • Restlessness
  • Psychomotor Hyperactivity
  • Tremor
  • Insomnia
  • Flatulence
These side effects may potentially be related to Mucinex Dm Maximum Strength.
Agitation, Pruritus, Insomnia, Restlessness

This Insomnia Mucinex D Maximum Strength side effect was reported by a consumer or non-health professional from US on Feb 03, 2014. A Female , 81 years of age, was treated with Mucinex D Maximum Strength. The patient presented the following health conditions:
  • Agitation
  • Pruritus
  • Insomnia
  • Restlessness
. Mucinex D Maximum Strength dosage: NA. Additional drugs used at the same time: NA.
Restlessness, Insomnia, Off Label Use

This is a Mucinex Maximum Strength side effect report of a 44-year-old female patient (weight:NA) from US, suffering from the following symptoms/conditions: influenza, who was treated with Mucinex Maximum Strength (dosage:Patient Took Last Dose At 10:00 P.m. On 09-jan-2014., start time: Jan 08, 2014), combined with: NA., and developed a serious reaction and a Insomnia side effect. The patient presented with:
  • Restlessness
  • Insomnia
  • Off Label Use
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Mucinex Maximum Strength treatment in female patients suffering from influenza, resulting in Insomnia.
Restlessness, Insomnia, Off Label Use

A 47-year-old patient (weight: NA) from US with the following symptoms: sinus disorder,influenza started Mucinex Maximum Strength treatment (dosage: Patient Took Last At 10:00 P.m. On 09-jan-2014.) on Jan 08, 2014. Soon after starting Mucinex Maximum Strength treatment, the consumer experienced several side effects, including:
  • Restlessness
  • Insomnia
  • Off Label Use
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Mucinex Maximum Strength side effects, such as Insomnia.
Restlessness, Insomnia

A female patient from US was prescribed and started Mucinex Fast-max Severe Congestion And Cough on Jan 09, 2014. Patient felt the following Mucinex side effects: restlessness, insomnia Additional patient health information: Female , 66 years of age, The consumer reported the following symptoms: . Mucinex Fast-max Severe Congestion And Cough dosage: Took 20ml Every 4-6 Hours. Concurrently used drugs: NA.
Hallucination, Delirium, Thinking Abnormal, Insomnia

This report suggests a potential Mucinex Maximum Strength Insomnia side effect(s) that can have serious consequences. A 83-year-old patient from US (weight:NA) was diagnosed with the following health condition(s): NA and used Mucinex Maximum Strength (dosage: Took 2 Tablets In Total, 1 Tablet On 19/dec/2013 And 2nd On 20/dec/2013) starting Dec 19, 2013. Soon after starting Mucinex Maximum Strength the patient began experiencing various side effects, including:
  • Hallucination
  • Delirium
  • Thinking Abnormal
  • Insomnia
Drugs used concurrently:NA. Although Mucinex Maximum Strength demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Insomnia, may still occur.
Eye Haemorrhage, Musculoskeletal Chest Pain, Oropharyngeal Pain, Cough, Insomnia

An adverse event was reported by a consumer or non-health professional on Nov 28, 2013 by a Female taking Mucinex Dm (dosage: Took 1 Tablet On 21-nov-2013 At 10pm) . Location: US , 54 years of age, patient began experiencing various side effects, including: Directly after treatment started, patient experienced the unwanted or unexpected Mucinex side effects: eye haemorrhage, musculoskeletal chest pain, oropharyngeal pain, cough, insomnia. Additional medications/treatments:
Agitation, Insomnia, Confusional State

This Insomnia problem was reported by a consumer or non-health professional from US. A 93-year-old female patient (weight: NA) was diagnosed with the following medical condition(s): NA.On Aug 04, 2013 a consumer started treatment with Mucinex Fast-max Dm Max (dosage: Last Used On 06-aug-2013). The following drugs/medications were being taken at the same time: NA. When commencing Mucinex Fast-max Dm Max, the patient experienced the following unwanted symptoms /side effects:
  • Agitation
  • Insomnia
  • Confusional State
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Insomnia, may become evident only after a product is in use by the general population.
Wheezing, Insomnia, Dyspnoea

This is a Mucinex side effect report of a 73-year-old female patient (weight: NA) from US. The patient developed the following symptoms/conditions: NA and was treated with Mucinex (dosage: Took 1 Tablet At 8:00 Pm On 16-jul-2013) starting Jul 16, 2013. Concurrently used drugs:
  • Albuterol
Soon after that, the consumer experienced the following of symptoms:
  • Wheezing
  • Insomnia
  • Dyspnoea
This opens a possibility that Mucinex could cause Insomnia and that some female patients may be more susceptible.
Anxiety, Feeling Jittery, Insomnia, Nervousness, Palpitations

This Insomnia side effect was reported by a consumer or non-health professional from US on May 23, 2013. A female patient from US , 42 years of age, was treated with Mucinex. Directly after treatment started, patient experienced the unwanted or unexpected Mucinex side effects: anxiety, feeling jittery, insomnia, nervousness, palpitations. Mucinex dosage: NA. These side effects may potentially be related to Mucinex.
Ear Infection, Epistaxis, Pharyngeal Haemorrhage, Insomnia

This Insomnia side effect was reported by a consumer or non-health professional from US. A 21-year-old female patient (weight:NA) experienced the following symptoms/conditions: NA. The patient was prescribed Mucinex Fast-max Severe Congestion + Cold Caplets (acetaminophen) (dosage: Took 2 Caplets On 21-mar-2013), which was started on Mar 21, 2013. Concurrently used drugs:
  • Mucinex Fast-max Severe Congestion + Cold Caplets (guaifenesin)
  • Mucinex Fast-max Severe Congestion + Cold Caplets (dextromethorphan)
  • Mucinex Fast-max Severe Congestion + Cold Caplets (phenylephrine)
When starting to take Mucinex Fast-max Severe Congestion + Cold Caplets (acetaminophen) the consumer reported the following symptoms:
  • Ear Infection
  • Epistaxis
  • Pharyngeal Haemorrhage
  • Insomnia
These side effects may potentially be related to Mucinex Fast-max Severe Congestion + Cold Caplets (acetaminophen).
Extrasystoles, Abdominal Pain Upper, Insomnia, Pallor, Constipation, Confusional State, Hypertension, Headache, Diarrhoea

This Insomnia Mucinex Fast Max Adult Congestion + Cough side effect was reported by a consumer or non-health professional from US on Nov 12, 2012. A male , 69 years of age, was treated with Mucinex Fast Max Adult Congestion + Cough. The patient presented the following health conditions:
  • Extrasystoles
  • Abdominal Pain Upper
  • Insomnia
  • Pallor
  • Constipation
  • Confusional State
  • Hypertension
  • Headache
  • Diarrhoea
. Mucinex Fast Max Adult Congestion + Cough dosage: NA. Additional drugs used at the same time: NA.
Heart Rate Irregular, Akathisia, Pyrexia, Insomnia, Restless Legs Syndrome, Muscular Weakness, Pain, Hyperhidrosis, Discomfort

This is a Mucinex D side effect report of a 28-year-old female patient (weight:NA) from US, suffering from the following symptoms/conditions: NA, who was treated with Mucinex D (dosage:NA, start time: Aug 28, 2012), combined with: NA., and developed a serious reaction and a Insomnia side effect. The patient presented with:
  • Heart Rate Irregular
  • Akathisia
  • Pyrexia
  • Insomnia
  • Restless Legs Syndrome
  • Muscular Weakness
  • Pain
  • Hyperhidrosis
  • Discomfort
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Mucinex D treatment in female patients suffering from NA, resulting in Insomnia.
Anxiety, Pallor, Rash, Abdominal Pain Upper, Insomnia, Diarrhoea

A 27-year-old patient (weight: NA) from US with the following symptoms: NA started Mucinex D (guaifenesin) treatment (dosage: Took 2 Tablets On 04-dec-2012 And 06-dec-2012) on Dec 04, 2012. Soon after starting Mucinex D (guaifenesin) treatment, the consumer experienced several side effects, including:
  • Anxiety
  • Pallor
  • Rash
  • Abdominal Pain Upper
  • Insomnia
  • Diarrhoea
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Mucinex D (guaifenesin) side effects, such as Insomnia.
Pharyngeal Oedema, Dyspnoea, Insomnia, Headache, Unevaluable Event

A female patient from US was prescribed and started Mucinex Fast Max Adult Cold + Sinus on Jan 09, 2013. After Mucinex was administered, patient encountered several Mucinex side effects: pharyngeal oedema, dyspnoea, insomnia, headache, unevaluable event Additional patient health information: Female , 66 years of age, The consumer reported the following symptoms: . Mucinex Fast Max Adult Cold + Sinus dosage: NA. Concurrently used drugs:
  • Mucinex Fast Max Adult Cold + Sinus (guaifenesin)
Muscle Spasms, Insomnia

This report suggests a potential Mucinex D Maximum Strength Insomnia side effect(s) that can have serious consequences. A 67-year-old patient from US (weight:NA) was diagnosed with the following health condition(s): NA and used Mucinex D Maximum Strength (dosage: NA) starting Nov 27, 2012. Soon after starting Mucinex D Maximum Strength the patient began experiencing various side effects, including:
  • Muscle Spasms
  • Insomnia
Drugs used concurrently:NA. Although Mucinex D Maximum Strength demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Insomnia, may still occur.
Blood Pressure Increased, Insomnia

An adverse event was reported by a consumer or non-health professional on Feb 28, 2013 by a male taking Mucinex Fast Max Adult Cold, Flu + Sore Throat (acetaminophen) (dosage: 1 Dose Of 2 Caplets) . Location: US , 64 years of age, patient began experiencing various side effects, including: Patient felt the following Mucinex side effects: blood pressure increased, insomnia. Additional medications/treatments:
Multiple prescriptions taken:
  • Mucinex Fast Max Adult Cold, Flu + Sore Throat (dextromethorphan)
  • Mucinex Fast Max Adult Cold, Flu + Sore Throat (guaifenesin)
  • Mucinex Fast Max Adult Cold, Flu + Sore Throat (phenylephrine)
Dyspnoea, Anxiety, Insomnia, Nervousness, Dizziness

This Insomnia problem was reported by a consumer or non-health professional from US. A 53-year-old patient (weight: NA) was diagnosed with the following medical condition(s): NA.On Feb 17, 2013 a consumer started treatment with Mucinex (dosage: Patient Took 1 600 Mg Every 12 Hours Until 19-feb-2013 Morning, Took 2 600 Mg Pills.). The following drugs/medications were being taken at the same time:
  • Allegra-d
When commencing Mucinex, the patient experienced the following unwanted symptoms /side effects:
  • Dyspnoea
  • Anxiety
  • Insomnia
  • Nervousness
  • Dizziness
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Insomnia, may become evident only after a product is in use by the general population.
Asthma, Palpitations, Feeling Of Body Temperature Change, Hyperhidrosis, Insomnia, Headache

This is a Mucinex Fast-max Severe Congestion And Cough side effect report of a 47-year-old female patient (weight: NA) from US. The patient developed the following symptoms/conditions: NA and was treated with Mucinex Fast-max Severe Congestion And Cough (dosage: NA) starting Dec 26, 2012. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Asthma
  • Palpitations
  • Feeling Of Body Temperature Change
  • Hyperhidrosis
  • Insomnia
  • Headache
This opens a possibility that Mucinex Fast-max Severe Congestion And Cough could cause Insomnia and that some female patients may be more susceptible.
Upper Respiratory Tract Infection, Insomnia, Hallucination, Fatigue

This Insomnia side effect was reported by a consumer or non-health professional from US on Jan 08, 2013. A female patient from US , 32 years of age, was diagnosed with and was treated with Mucinex D. Patient felt the following Mucinex side effects: upper respiratory tract infection, insomnia, hallucination, fatigue. Mucinex D dosage: Stopped On 05-dec-2012. These side effects may potentially be related to Mucinex D.
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DISCLAIMER: ALL DATA PROVIDED AS-IS, refer to terms of use for additional information.

Mucinex Insomnia Causes and Reviews


Insomnia is a common sleep disorder. If you have it, you may have trouble falling asleep, staying asleep, or both. As a result, you may get too little sleep or have poor-quality sleep. You may not feel refreshed when you wake up.

Symptoms of Insomnia include:

  • Lying awake for a long time before you fall asleep
  • Sleeping for only short periods
  • Being awake for much of the night
  • Feeling as if you haven't slept at all
  • Waking up too early

Your doctor will diagnose Insomnia based on your medical and sleep histories and a physical exam. He or she also may recommend a sleep study. A sleep study measures how well you sleep and how your body responds to sleep problems. Treatments include good sleep habits, counseling, and medicines.

NIH: National Heart, Lung, and Blood Institute


Mucinex Insomnia Reviews

Tue, 28 Feb 2012

I bought Mucinex 12 hour expectorant with 600mg of guaniffesein. I thought this was suppose to thin out the mucus and help expel the phlegm. Instead I experienced a terrific headache, sinus pressure in my ears , and it dried up all my mucus (like using an antihistamine) that I never had any productive cough or expelling of phlegm! I also drank herbal teas with lemon and honey and homemade vegetable soup during the day and sipped on tea all day long. I was so dried up and headachy that I had to use steam from a boiling pot to help open and moisten sinus airways. After a while I decided to eat a lot of real food to help absorb the potency of this formula. NEVER NEVER take this! I returned it to Walgreen's and got my money back. Instead of helping my cold, Mucinex made my whole day un bearable!

Sat, 17 Mar 2012

Do not take Mucinex if you are allergic to sulfa drugs. My son is highly allergic to sulfa and has had several reactions while taking Mucinex over the last 6 months. We just found out that it was the Mucinex and not any other exposure that was causing his hives/rash/itching/swelling/etc. This last reaction was worse than any other reaction he has had. After the Mucinex was out of his system he began to get better. Now we are warning all our friends and family - Dont take this if you have a sulfa allergy!

Tue, 06 Mar 2012

Had a very bad cold with an unrelenting cough. Took Mucinex DM on pharmacists recommendation. First night was great, slept didn't cough as much. continued with medication.
Second day -Started feeling unusually sleepy/ cold /weird headache loose bowels nausea odd feelings Put it down to the cold getting worse. Second day read box for side effects. NONE I was having. Day three -Now horrible cramping diarrhea, nausea and dehydration though drinking clear fluids non stop. becoming irrational and hypersensitive, face felt slightly numb. Finally checked the internet and found this.Soon as stopped, much better. Still have a cold, but I don't care. Lemon, honey and Irish whiskey working much better for me.

Sat, 27 Oct 2012

I have fibromylgia cannot see any reason to take musinex for it.

Fri, 27 Apr 2012

Mucinex is good but I agree, I used it and got some diziness and fatigue.

Wed, 01 Feb 2012

my urine was also a sickening sweet smell after taking musinex. i had horrible nausea when i took it then the next day the urine smell.

Mon, 16 Apr 2012

great stuff

Thu, 29 Mar 2012

My lungs are failing and I believe its from 3 doses of Muscinex dm. I had Bronchitis and took Muscinex on advice from my Dr. A week before that I had quit smoking, so now that's all anyone pays attention to, but while I smoked I NEVER had any lung problems. I quit because I got tired of the smell around me, not because of any physical problems. I have never had any excess mucus, in fact I have never coughed.
Twice now I have been unable to draw in breath and have had to be hospitalized. One of my nurses agreed that the drug may have glazed my lungs, and that's exactly how they feel now. My voice is raspy and I lose it completely every few days, usually from trying to have a conversation.
I am seeing a pulmonary specialist who has me on Spiriva until tests are finished but neither that, Albuterol or Flovent have any effect on how I feel. I am extremely short of breath when talking on the phone or even walking to the car. I have gained 20 lbs from my inactivity and that doesn't help.
Muscinex has changed my life drastically, and may be what ends it. That stuff needs to be pulled.

Fri, 25 Jan 2013

Thanks everyone for your input! I had sinus infection and was put on antibiotics and Mucinex DM. Had blurry vision and was very dizzy. Thought it was the antibiotics. PCP changed me to a different antibiotics not realizing it was the Mucinex. My last dose of Mucinex was Sunday and my eyes are still dilated.....blurry vision. Mucinex made me so dizzy, I couldn't stand up. I weigh 98 lbs and so the side effects are lasting a lot longer. So glad I found all your comments.....this helps!

Thu, 29 Mar 2012

My husband was taking Mucinex routinely for COPD to thin the heavy mucus, but after about 3 weeks, he began having serious mucusy coughing fits, then had emotional bouts. After reading this site, I had him stop and the problems cleared in about 15 hours.

DISCLAIMER: ALL DATA PROVIDED AS-IS, refer to terms of use for additional information.

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Top Mucinex Side Effects

Dizziness (314)
Blood Pressure Increased (225)
Headache (181)
Epistaxis (168)
Nausea (159)
Feeling Abnormal (153)
Heart Rate Increased (125)
Diarrhoea (124)
Hallucination (119)
Dyspnoea (107)
Anxiety (106)
Insomnia (106)
Vomiting (84)
Hypertension (73)
Confusional State (68)
Loss Of Consciousness (63)
Haemoptysis (62)
Tremor (55)
Asthenia (53)
Somnolence (46)
Palpitations (43)
Nervousness (41)
Off Label Use (38)
Hyperhidrosis (35)
Disorientation (35)
Urticaria (34)
Fatigue (34)
Abdominal Pain Upper (32)
Accidental Overdose (30)
Overdose (30)
Chest Pain (29)
Convulsion (28)
Cough (28)
Malaise (25)
Feeling Jittery (24)
Syncope (24)
Hypoaesthesia (24)
Lip Swelling (23)
Lethargy (23)
Psychomotor Hyperactivity (22)
Hypersensitivity (22)
Pharyngeal Oedema (22)
Faeces Discoloured (22)
Agitation (22)
Rash (21)
Chest Discomfort (21)
Unevaluable Event (21)
Vision Blurred (21)
Mucosal Haemorrhage (20)
Dysphagia (20)

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