Mucinex Fatigue Side Effect Reports


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

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


Depression, Fatigue, Feeling Abnormal, Unevaluable Event

This Fatigue side effect was reported by a consumer or non-health professional from US. A 43-year-old patient (weight:NA) experienced the following symptoms/conditions: NA. The patient was prescribed Mucinex Dm (dosage: Took 6 Doses In Late November.), which was started on NS. Concurrently used drugs: NA. When starting to take Mucinex Dm the consumer reported the following symptoms:
  • Depression
  • Fatigue
  • Feeling Abnormal
  • Unevaluable Event
These side effects may potentially be related to Mucinex Dm.
Arrhythmia, Dizziness, Fatigue

This Fatigue Mucinex D side effect was reported by a consumer or non-health professional from US on Nov 04, 2013. A Female , 39 years of age, weighting 125.0 lb, was diagnosed with and was treated with Mucinex D. The patient presented the following health conditions:
  • Arrhythmia
  • Dizziness
  • Fatigue
. Mucinex D dosage: 1 Pill. Additional drugs used at the same time: NA.
Abnormal Behaviour, Balance Disorder, Somnolence, Vomiting, Fatigue, Overdose

This is a Mucinex Dm Maximum Strength side effect report of a female patient (weight:NA) from US, suffering from the following symptoms/conditions: NA, who was treated with Mucinex Dm Maximum Strength (dosage:NA, start time: NS), combined with: NA., and developed a serious reaction and a Fatigue side effect. The patient presented with:
  • Abnormal Behaviour
  • Balance Disorder
  • Somnolence
  • Vomiting
  • Fatigue
  • Overdose
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 Fatigue.
Hallucination, Nightmare, Dyspnoea, Chest Pain, Body Temperature Decreased, Tremor, Restlessness, Fatigue, Dizziness

A 82-year-old patient (weight: NA) from US with the following symptoms: increased upper airway secretion started Mucinex Dm Maximum Strength (guaifenesin) treatment (dosage: Took 1 Tablet Of Mucinex Dm Maximum Strength On 10-mar-2013.) on Mar 10, 2013. Soon after starting Mucinex Dm Maximum Strength (guaifenesin) treatment, the consumer experienced several side effects, including:
  • Hallucination
  • Nightmare
  • Dyspnoea
  • Chest Pain
  • Body Temperature Decreased
  • Tremor
  • Restlessness
  • Fatigue
  • Dizziness
. Concurrently used drugs:
  • Mucinex Dm Maximum Strength (dextromethorphan Hydrobromide)
  • Insulin
  • Metformin
  • Lovastatin
This finding indicates that some patients can be more vulnerable to developing Mucinex Dm Maximum Strength (guaifenesin) side effects, such as Fatigue.
Pharyngeal Oedema, Dyspnoea, Crying, Musculoskeletal Discomfort, Chest Pain, Disorientation, Anxiety, Asthenia, Fatigue

A female patient from US was prescribed and started Mucinex Dm on Jan 21, 2013. Patient felt the following Mucinex side effects: pharyngeal oedema, dyspnoea, crying, musculoskeletal discomfort, chest pain, disorientation, anxiety, asthenia, fatigue Additional patient health information: Female , 54 years of age, The consumer reported the following symptoms: was diagnosed with and. Mucinex Dm dosage: NA. Concurrently used drugs: NA.
Upper Respiratory Tract Infection, Insomnia, Hallucination, Fatigue

This report suggests a potential Mucinex D Fatigue side effect(s) that can have serious consequences. A 32-year-old female patient from US (weight:NA) was diagnosed with the following health condition(s): increased upper airway secretion and used Mucinex D (dosage: Stopped On 05-dec-2012) starting Dec 03, 2012. Soon after starting Mucinex D the patient began experiencing various side effects, including:
  • Upper Respiratory Tract Infection
  • Insomnia
  • Hallucination
  • Fatigue
Drugs used concurrently:NA. Although Mucinex D demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Fatigue, may still occur.
Bronchopneumonia, Convulsion, Chest Pain, Palpitations, Hypoaesthesia, Disorientation, Dyspnoea, Headache, Fatigue

An adverse event was reported by a consumer or non-health professional on Feb 25, 2013 by a Female taking Mucinex Dm Maximum Strength (guaifenesin) (dosage: NA) was diagnosed with and. Location: US , 33 years of age, patient began experiencing various side effects, including: Directly after treatment started, patient experienced the unwanted or unexpected Mucinex side effects: bronchopneumonia, convulsion, chest pain, palpitations, hypoaesthesia, disorientation, dyspnoea, headache, fatigue. Additional medications/treatments:
Loss Of Consciousness, Nervousness, Fatigue, Vomiting

This Fatigue problem was reported by a consumer or non-health professional from US. A 17-year-old female patient (weight: NA) was diagnosed with the following medical condition(s): NA.On Feb 06, 2013 a consumer started treatment with Mucinex D (dosage: NA). The following drugs/medications were being taken at the same time: NA. When commencing Mucinex D, the patient experienced the following unwanted symptoms /side effects:
  • Loss Of Consciousness
  • Nervousness
  • Fatigue
  • Vomiting
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Fatigue, may become evident only after a product is in use by the general population.
Fatigue, Increased Viscosity Of Nasal Secretion, Memory Impairment, Wheezing, Aphonia

This is a Mucinex Dm side effect report of a 84-year-old female patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: cough,increased upper airway secretion and was treated with Mucinex Dm (dosage: NA) starting May 04, 2012. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Fatigue
  • Increased Viscosity Of Nasal Secretion
  • Memory Impairment
  • Wheezing
  • Aphonia
This opens a possibility that Mucinex Dm could cause Fatigue and that some female patients may be more susceptible.
Somnolence, Fatigue, Tachycardia, Agitation, Nasal Dryness, Anxiety, Blood Pressure Increased

This Fatigue side effect was reported by a consumer or non-health professional from UNITED STATES on May 02, 2012. A patient from UNITED STATES , 44 years of age, was treated with Mucinex. Directly after treatment started, patient experienced the unwanted or unexpected Mucinex side effects: somnolence, fatigue, tachycardia, agitation, nasal dryness, anxiety, blood pressure increased. Mucinex dosage: NA. These side effects may potentially be related to Mucinex.
Blood Pressure Increased, Somnolence, Tachycardia, Agitation, Fatigue, Off Label Use

This Fatigue side effect was reported by a consumer or non-health professional from UNITED STATES. A 44-year-old patient (weight:NA) experienced the following symptoms/conditions: respiratory tract congestion,hypertension. The patient was prescribed Mucinex (dosage: Took 1 Tablet On Either 16-apr-2012 And 17-apr-2012.), which was started on Apr 21, 2012. Concurrently used drugs:
  • Lipitor
When starting to take Mucinex the consumer reported the following symptoms:
  • Blood Pressure Increased
  • Somnolence
  • Tachycardia
  • Agitation
  • Fatigue
  • Off Label Use
These side effects may potentially be related to Mucinex.
Retching, Memory Impairment, Pneumonia, Confusional State, Somnolence, Fatigue

This Fatigue Mucinex side effect was reported by a consumer or non-health professional from UNITED STATES on Apr 24, 2012. A male , 77 years of age, was treated with Mucinex. The patient presented the following health conditions:
  • Retching
  • Memory Impairment
  • Pneumonia
  • Confusional State
  • Somnolence
  • Fatigue
. Mucinex dosage: Took 1 Tablet At 2.15pm On 15-apr-2012. Additional drugs used at the same time: NA. The patient was hospitalized.
Injury, Oedema Peripheral, Pulmonary Embolism, Fatigue, Deep Vein Thrombosis, Erythema

This is a Mucinex side effect report of a 38-year-old female patient (weight:NA) from UNITED STATES, suffering from the following symptoms/conditions: NA, who was treated with Mucinex (dosage:600 Mg, Qd, start time: Oct 17, 2009), combined with:
  • Drospirenone And Ethinyl Estradiol (Unk)
  • Wellbutrin (300 Mg, Qd)
  • Metformin Hcl (1000 Mg, Qd)
  • Albuterol
, and developed a serious reaction and a Fatigue side effect. The patient presented with:
  • Injury
  • Oedema Peripheral
  • Pulmonary Embolism
  • Fatigue
  • Deep Vein Thrombosis
  • Erythema
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 treatment in female patients suffering from NA, resulting in Fatigue.
Fatigue, Jaundice

A female patient (weight: NA) from UNITED STATES with the following symptoms: NA started Mucinex treatment (dosage: NA) on Feb 17, 2011. Soon after starting Mucinex treatment, the consumer experienced several side effects, including:
  • Fatigue
  • Jaundice
. Concurrently used drugs:
  • Avelox
This finding indicates that some patients can be more vulnerable to developing Mucinex side effects, such as Fatigue.
Lethargy, Headache, Fatigue, Urticaria, Rhinorrhoea, Epistaxis, Nausea, Mucosal Haemorrhage

A patient from UNITED STATES was prescribed and started Mucinex on Feb 03, 2012. After Mucinex was administered, patient encountered several Mucinex side effects: lethargy, headache, fatigue, urticaria, rhinorrhoea, epistaxis, nausea, mucosal haemorrhage Additional patient health information: male , 65 years of age, The consumer reported the following symptoms: . Mucinex dosage: Started A Month Ago, 1-2 600mg Tablets/day. Concurrently used drugs: NA.
Fatigue, Nausea, Haematochezia

This report suggests a potential Mucinex Fatigue side effect(s) that can have serious consequences. A 75-year-old female patient from UNITED STATES (weight:NA) was diagnosed with the following health condition(s): NA and used Mucinex (dosage: NA) starting Nov 11, 2011. Soon after starting Mucinex the patient began experiencing various side effects, including:
  • Fatigue
  • Nausea
  • Haematochezia
Drugs used concurrently:
  • Oscal-d
  • Centrum
Although Mucinex demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Fatigue, may still occur.
Back Pain, Dizziness, Dyspnoea, Pruritus, Tachycardia, Flushing, Anxiety, Chest Discomfort, Fatigue

An adverse event was reported by a physician on Jun 15, 2011 by a Female taking Mucinex (dosage: NA) . Location: UNITED STATES , 67 years of age, weighting 158.0 lb, patient began experiencing various side effects, including: Patient felt the following Mucinex side effects: back pain, dizziness, dyspnoea, pruritus, tachycardia, flushing, anxiety, chest discomfort, fatigue. Additional medications/treatments:
Multiple prescriptions taken:
  • Lovastatin
  • Diphenhydramine Hcl
  • Lantus
  • Metformin Hcl
  • Hizentra
  • Micardis
  • Multivitamin
  • Hizentra
Fatigue, Hallucination, Restlessness

This Fatigue problem was reported by a consumer or non-health professional from UNITED STATES. A 30-year-old female patient (weight: NA) was diagnosed with the following medical condition(s): NA.On NS a consumer started treatment with Mucinex Dm (dosage: Patient Took Two Tablets On 02-may-2011 And Two Tablets On 03-may-2011.). The following drugs/medications were being taken at the same time: NA. When commencing Mucinex Dm, the patient experienced the following unwanted symptoms /side effects:
  • Fatigue
  • Hallucination
  • Restlessness
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Fatigue, may become evident only after a product is in use by the general population.
Arrhythmia, Feeling Abnormal, Fatigue, Back Pain, Renal Disorder, Syncope, Heart Rate Increased, Dyspnoea, Mobility Decreased

This is a Mucinex D side effect report of a female patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Mucinex D (dosage: Patient Started Dosing On 12-feb-2011) starting NS. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Arrhythmia
  • Feeling Abnormal
  • Fatigue
  • Back Pain
  • Renal Disorder
  • Syncope
  • Heart Rate Increased
  • Dyspnoea
  • Mobility Decreased
This opens a possibility that Mucinex D could cause Fatigue and that some female patients may be more susceptible.
Mobility Decreased, Arrhythmia, Dyspnoea, Pain, Insomnia, Feeling Abnormal, Heart Rate Increased, Fatigue, Tinnitus

This Fatigue side effect was reported by a consumer or non-health professional from UNITED STATES on Feb 18, 2011. A female patient from UNITED STATES , 62 years of age, was treated with Mucinex D. Patient felt the following Mucinex side effects: mobility decreased, arrhythmia, dyspnoea, pain, insomnia, feeling abnormal, heart rate increased, fatigue, tinnitus. Mucinex D dosage: Patient Started Dosing On 12-feb-2011. These side effects may potentially be related to Mucinex D.

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

Mucinex Fatigue Causes and Reviews


Everyone feels tired now and then. Sometimes you may just want to stay in bed. But, after a good night's sleep, most people feel refreshed and ready to face a new day. If you continue to feel tired for weeks, it's time to see your doctor. He or she may be able to help you find out what's causing your Fatigue and recommend ways to relieve it.

Fatigue itself is not a disease. Medical problems, treatments, and personal habits can add to Fatigue. These include

  • Taking certain medicines, such as antidepressants, antihistamines, and medicines for nausea and pain
  • Having medical treatments, like chemotherapy and radiation
  • Recovering from major surgery
  • Anxiety, stress, or depression
  • Staying up too late
  • Drinking too much alcohol or too many caffeinated drinks
  • Pregnancy

One disorder that causes extreme Fatigue is chronic Fatigue syndrome (CFS). This Fatigue is not the kind of tired feeling that goes away after you rest. Instead, it lasts a long time and limits your ability to do ordinary daily activities.

NIH: National Institute on Aging


Mucinex Fatigue Reviews

Fri, 27 Apr 2012

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

Tue, 18 Sep 2012

oh wow!!! im am SO relieved i found this discussion. i was coughing with a greenish plegm for about a week before buying Mucinex DM upon recommendation of a Duane reade pharmacist. as soon as i started taking the drug, i started having a slight fever (just above the normal temperature, and those are the nastiest ones), i would suddenly feel chilly, go to bed, cover myself up with two blankets, then it would go away in like halfhour, i would get back up from the bed, to do stuff around the house then the fever would come back, and so on. besides the fever, not only did it not get rid of the cough and phlegm, the cough never really stopped and the phlegm turned into a different color, very light yellow almost white. i did not measure the blood pressure or anything, but other (un)funny things were happening...this feeling of helplessness, sense of dying, depression, sweating (my pillow and my sheets would be all wet in the morning) and Fatigue, Fatigue, Fatigue. i was irritable towards the slightest things, the point of wanting to smash something, but not really being able to do so due to weakness and Fatigue. scary stuff if you ask me. and all the time not really realizing that it may have just been Mucinex's fault. so the cough was not really going away, and neither did the phlegm, i went to see a doctor, who told me that taking Mucinex DM did not really make any sense since i already had had the phlegm, and all the drug did was producing more of it. the first thing she ordered was that i immediately stop the drug, and prescribed me different a different one for cough, some stronger prescription stuff. ok, now the last time I took Mucinex DM was about 8 hours ago, and I am feeling less depressed (partly because i saw this discussion), a little stronger physically... still sweating a little, just becuase the drug has not completely left the system. i am going to try to return it to the pharmacy tomorrow. if they don't give me a refund, i do not give a crap, i'll just leave the poison pills with them anyway. this stuff should be seriously questioned, and maybe taken off the shelves...... funny thing i started typing "Mucinex dm" in the google search, and the 1st suggestion was "Mucinex dm side effects". someone should take a note of that.

Mon, 11 Jan 2010
I took Mucinex DM maxiumum strength (12 hour). One pill last night at 6:00 p.m. and one pill this morning at 6:00 am. By 9:00 am, I was having diarrhea. My husband had been taking the regular Mucinex over the last few days and complaining of Fatigue, dizziness, and diarrhea but I just thought he was really sick. I feel like this medicine definitely extended his recovery time. He did not take any at all yesterday and he is feeling much better. :(
Tue, 19 Apr 2011
Nausea, dilated pupils, feeling of being feverish, Fatigue, delirium
Thu, 01 Dec 2011
disoriented, dilated pupils, blurred vision, drooped left eye lid and swelling, numbness all left side of face, loss of appetite, itching, feels like I have a piece of small particle in left eye, left eye waters when reading or any use, Fatigue/tired, headaches, extreme dryness in throat, cough attacks, loss of sense and smell. Not to mention discomfort while trying to work, and my daily activities are on hold for who knows how long... This is POISON NO DOUBT!
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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