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Mucinex Somnolence Side Effects

Mucinex Somnolence Side Effect Reports


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

This information will help you understand how side effects, such as Somnolence, 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.



Loss Of Consciousness, Somnolence, Dizziness

This Somnolence side effect was reported by a consumer or non-health professional from US. A 64-year-old female patient (weight:NA) experienced the following symptoms/conditions: NA. The patient was prescribed Mucinex Dm (dosage: 2 Tablets Every 12 Hours), which was started on Jan 10, 2014. Concurrently used drugs: NA. When starting to take Mucinex Dm the consumer reported the following symptoms:
  • Loss Of Consciousness
  • Somnolence
  • Dizziness
These side effects may potentially be related to Mucinex Dm.
Hypersensitivity, Loss Of Consciousness, Hypertension, Throat Tightness, Swollen Tongue, Confusional State, Dyspnoea, Somnolence, Urticaria

This Somnolence Mucinex Sinus Max Severe Congestion Caplet side effect was reported by a consumer or non-health professional from US on Jan 17, 2014. A male , 65 years of age, was treated with Mucinex Sinus Max Severe Congestion Caplet. The patient presented the following health conditions:
  • Hypersensitivity
  • Loss Of Consciousness
  • Hypertension
  • Throat Tightness
  • Swollen Tongue
  • Confusional State
  • Dyspnoea
  • Somnolence
  • Urticaria
. Mucinex Sinus Max Severe Congestion Caplet dosage: One Caplet. Last Used On 28-dec-2013. Additional drugs used at the same time: NA. The patient was hospitalized.
Hallucination, Agitation, Abasia, Mydriasis, Nervousness, Somnolence, Dizziness, Nausea

This is a Mucinex Dm Maximum Strength side effect report of a 21-year-old female patient (weight:NA) from US, suffering from the following symptoms/conditions: NA, who was treated with Mucinex Dm Maximum Strength (dosage:Took 1 Tablet On 29-nov-2013, start time: Nov 29, 2013), combined with: NA., and developed a serious reaction and a Somnolence side effect. The patient presented with:
  • Hallucination
  • Agitation
  • Abasia
  • Mydriasis
  • Nervousness
  • Somnolence
  • Dizziness
  • Nausea
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Mucinex Dm Maximum Strength treatment in female patients suffering from NA, resulting in Somnolence.

Convulsion, Speech Disorder, Amnesia, Headache, Somnolence, Unevaluable Event, Chest Pain, Neck Pain

A 31-year-old female patient (weight: NA) from US with the following symptoms: NA started Mucinex treatment (dosage: Patient Took Last Dose On 20-nov-2013) on Nov 20, 2013. Soon after starting Mucinex treatment, the consumer experienced several side effects, including:
  • Convulsion
  • Speech Disorder
  • Amnesia
  • Headache
  • Somnolence
  • Unevaluable Event
  • Chest Pain
  • Neck Pain
. Concurrently used drugs:
  • Ibuprofen (Patient Took Half Of 800 Mg Tablet On 20-nov-2013)
  • Cough Syrup
  • Cough Syrup
  • Lisinopril
  • Ropinirole
This finding indicates that some patients can be more vulnerable to developing Mucinex side effects, such as Somnolence.
Feeling Abnormal, Confusional State, Somnolence, Dizziness

A female patient from US was prescribed and started Mucinex Dm Maximum Strength on Nov 26, 2013. Patient felt the following Mucinex side effects: feeling abnormal, confusional state, somnolence, dizziness Additional patient health information: Female , 57 years of age, The consumer reported the following symptoms: . Mucinex Dm Maximum Strength dosage: Last Used On 18-nov-2013.. Concurrently used drugs:
  • Bupropion
  • Vitamin D
Dysarthria, Accidental Overdose, Somnolence, Confusional State

This report suggests a potential Mucinex Dm Maximum Strength Somnolence side effect(s) that can have serious consequences. A 79-year-old female patient from US (weight:NA) was diagnosed with the following health condition(s): NA and used Mucinex Dm Maximum Strength (dosage: NA) starting Oct 19, 2013. Soon after starting Mucinex Dm Maximum Strength the patient began experiencing various side effects, including:
  • Dysarthria
  • Accidental Overdose
  • Somnolence
  • Confusional State
Drugs used concurrently:
  • Ativan
  • Exelon Patch
  • Potassium Chloride
Although Mucinex Dm Maximum Strength demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Somnolence, may still occur.
Hallucination, Hypersomnia, Somnolence

An adverse event was reported by a consumer or non-health professional on Sep 30, 2013 by a Female taking Mucinex Dm (dosage: NA) was diagnosed with and. Location: US , 98 years of age, patient began experiencing various side effects, including: Directly after treatment started, patient experienced the unwanted or unexpected Mucinex side effects: hallucination, hypersomnia, somnolence. Additional medications/treatments:
Abnormal Behaviour, Balance Disorder, Somnolence, Vomiting, Fatigue, Overdose

This Somnolence problem was reported by a consumer or non-health professional from US. A female patient (weight: NA) was diagnosed with the following medical condition(s): NA.On NS a consumer started treatment with Mucinex Dm Maximum Strength (dosage: NA). The following drugs/medications were being taken at the same time: NA. When commencing Mucinex Dm Maximum Strength, the patient experienced the following unwanted symptoms /side effects:
  • Abnormal Behaviour
  • Balance Disorder
  • Somnolence
  • Vomiting
  • Fatigue
  • Overdose
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Somnolence, may become evident only after a product is in use by the general population.
Mydriasis, Nausea, Retching, Dizziness, Somnolence, Heart Rate Increased, Anxiety, Vision Blurred, Tremor

This is a Mucinex Dm Maximum Strength side effect report of a 24-year-old female patient (weight: NA) from US. The patient developed the following symptoms/conditions: NA and was treated with Mucinex Dm Maximum Strength (dosage: NA) starting Mar 15, 2013. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Mydriasis
  • Nausea
  • Retching
  • Dizziness
  • Somnolence
  • Heart Rate Increased
  • Anxiety
  • Vision Blurred
  • Tremor
This opens a possibility that Mucinex Dm Maximum Strength could cause Somnolence and that some female patients may be more susceptible.
Syncope, Loss Of Consciousness, Cold Sweat, Contusion, Asthenia, Dizziness, Nausea, Somnolence

This Somnolence side effect was reported by a consumer or non-health professional from US on Sep 18, 2012. A patient from US , 73 years of age, was diagnosed with and was treated with Mucinex Dm. Directly after treatment started, patient experienced the unwanted or unexpected Mucinex side effects: syncope, loss of consciousness, cold sweat, contusion, asthenia, dizziness, nausea, somnolence. Mucinex Dm dosage: NA. These side effects may potentially be related to Mucinex Dm.
Swelling Face, Somnolence

This Somnolence side effect was reported by a consumer or non-health professional from US. A 75-year-old patient (weight:NA) experienced the following symptoms/conditions: nasopharyngitis,oropharyngeal pain. The patient was prescribed Mucinex Dm (dosage: NA), which was started on Aug 27, 2012. Concurrently used drugs: NA. When starting to take Mucinex Dm the consumer reported the following symptoms:
  • Swelling Face
  • Somnolence
These side effects may potentially be related to Mucinex Dm.
Paranoia, Diarrhoea, Abdominal Discomfort, Thinking Abnormal, Somnolence, Anxiety, Off Label Use

This Somnolence Mucinex Dm side effect was reported by a consumer or non-health professional from US on Nov 26, 2012. A male , 23 years of age, was diagnosed with and was treated with Mucinex Dm. The patient presented the following health conditions:
  • Paranoia
  • Diarrhoea
  • Abdominal Discomfort
  • Thinking Abnormal
  • Somnolence
  • Anxiety
  • Off Label Use
. Mucinex Dm dosage: NA. Additional drugs used at the same time: NA.
Delirium, Confusional State, Tremor, Asthenia, Somnolence, Blood Potassium Decreased, Dehydration, Urinary Tract Infection

This is a Mucinex Dm side effect report of a 65-year-old female patient (weight:NA) from US, suffering from the following symptoms/conditions: NA, who was treated with Mucinex Dm (dosage:Started Around On 01-dec-2012 Consecutively Until 13-dec-2012 And Again Resumed On 15-dec-2012, start time: Dec 15, 2012), combined with: NA., and developed a serious reaction and a Somnolence side effect. The patient presented with:
  • Delirium
  • Confusional State
  • Tremor
  • Asthenia
  • Somnolence
  • Blood Potassium Decreased
  • Dehydration
  • Urinary Tract Infection
which developed after the beginning of treatment. The patient was hospitalized. This side effect report can indicate a possible existence of increased vulnerability to Mucinex Dm treatment in female patients suffering from NA, resulting in Somnolence.
Blood Glucose Increased, Somnolence

A 40-year-old patient (weight: NA) from US with the following symptoms: NA started Mucinex Dm Maximum Strength (guaifenesin) treatment (dosage: NA) on Jan 23, 2013. Soon after starting Mucinex Dm Maximum Strength (guaifenesin) treatment, the consumer experienced several side effects, including:
  • Blood Glucose Increased
  • Somnolence
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Mucinex Dm Maximum Strength (guaifenesin) side effects, such as Somnolence.
Constipation, Hyperhidrosis, Confusional State, Abnormal Dreams, Abdominal Pain Upper, Feeling Abnormal, Headache, Somnolence

A female patient from US was prescribed and started Mucinex Fast Max Adult Cold, Flu + Sore Throat (acetaminophen) on Mar 08, 2013. After Mucinex was administered, patient encountered several Mucinex side effects: constipation, hyperhidrosis, confusional state, abnormal dreams, abdominal pain upper, feeling abnormal, headache, somnolence Additional patient health information: Female , 71 years of age, The consumer reported the following symptoms: . Mucinex Fast Max Adult Cold, Flu + Sore Throat (acetaminophen) dosage: Patient Took Another 20ml Dose On 07-feb-2013 Night.. Concurrently used drugs:
  • 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)
  • Synthroid
  • Zoloft
Tongue Disorder, Dry Mouth, Somnolence, Speech Disorder, Swollen Tongue, Hypoaesthesia Oral, Dysphagia, Paraesthesia Oral

This report suggests a potential Mucinex Somnolence side effect(s) that can have serious consequences. A 34-year-old female patient from UNITED STATES (weight:NA) was diagnosed with the following health condition(s): NA and used Mucinex (dosage: NA) starting Jun 03, 2012. Soon after starting Mucinex the patient began experiencing various side effects, including:
  • Tongue Disorder
  • Dry Mouth
  • Somnolence
  • Speech Disorder
  • Swollen Tongue
  • Hypoaesthesia Oral
  • Dysphagia
  • Paraesthesia Oral
Drugs used concurrently:NA. Although Mucinex demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Somnolence, may still occur.
Somnolence, Fatigue, Tachycardia, Agitation, Nasal Dryness, Anxiety, Blood Pressure Increased

An adverse event was reported by a consumer or non-health professional on May 02, 2012 by a male taking Mucinex (dosage: NA) . Location: UNITED STATES , 44 years of age, patient began experiencing various side effects, including: Patient felt the following Mucinex side effects: somnolence, fatigue, tachycardia, agitation, nasal dryness, anxiety, blood pressure increased. Additional medications/treatments:
Blood Pressure Increased, Somnolence, Tachycardia, Agitation, Fatigue, Off Label Use

This Somnolence problem was reported by a consumer or non-health professional from UNITED STATES. A 44-year-old patient (weight: NA) was diagnosed with the following medical condition(s): respiratory tract congestion,hypertension.On Apr 21, 2012 a consumer started treatment with Mucinex (dosage: Took 1 Tablet On Either 16-apr-2012 And 17-apr-2012.). The following drugs/medications were being taken at the same time:
  • Lipitor
When commencing Mucinex, the patient experienced the following unwanted symptoms /side effects:
  • Blood Pressure Increased
  • Somnolence
  • Tachycardia
  • Agitation
  • Fatigue
  • Off Label Use
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Somnolence, may become evident only after a product is in use by the general population.
Retching, Memory Impairment, Pneumonia, Confusional State, Somnolence, Fatigue

This is a Mucinex side effect report of a 77-year-old patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Mucinex (dosage: Took 1 Tablet At 2.15pm On 15-apr-2012) starting Apr 15, 2012. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Retching
  • Memory Impairment
  • Pneumonia
  • Confusional State
  • Somnolence
  • Fatigue
The patient was hospitalized. This opens a possibility that Mucinex could cause Somnolence and that some patients may be more susceptible.
Hypopnoea, Heart Rate Increased, Abdominal Pain Upper, Cold Sweat, Loss Of Consciousness, Somnolence, Diarrhoea

This Somnolence side effect was reported by a consumer or non-health professional from UNITED STATES on Feb 06, 2012. A female patient from UNITED STATES , 38 years of age, was treated with Mucinex Dm. Patient felt the following Mucinex side effects: hypopnoea, heart rate increased, abdominal pain upper, cold sweat, loss of consciousness, somnolence, diarrhoea. Mucinex Dm dosage: NA. These side effects may potentially be related to Mucinex Dm.
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Mucinex Somnolence Causes and Reviews


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Mucinex Somnolence 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 (299)
Blood Pressure Increased (225)
Headache (170)
Epistaxis (168)
Nausea (155)
Feeling Abnormal (142)
Diarrhoea (123)
Heart Rate Increased (118)
Hallucination (113)
Dyspnoea (107)
Insomnia (105)
Anxiety (101)
Vomiting (84)
Hypertension (73)
Confusional State (66)
Haemoptysis (62)
Loss Of Consciousness (61)
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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