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Mucinex Side Effects

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Common Mucinex Side Effects


The most commonly reported Mucinex side effects (click to view or check a box to report):

Dizziness (191)
Blood Pressure Increased (172)
Epistaxis (151)
Headache (121)
Nausea (107)
Hallucination (100)
Dyspnoea (99)
Feeling Abnormal (89)
Insomnia (81)
Heart Rate Increased (76)
Anxiety (69)
Diarrhoea (68)
Vomiting (66)
Hypertension (63)
Loss Of Consciousness (60)
Haemoptysis (57)
Confusional State (57)
Asthenia (49)
Tremor (48)
Somnolence (44)

➢ More



If you or someone in your family has experienced a serious side effect to a health product, you are encouraged to report the experience to your health care professional (e.g. physician, pharmacist). You could also complete a copy of the side effect reporting form or report your side effect to FDA.

Mucinex Side Effects Reported to FDA



Mucinex Side Effect Report#9861749
Agitation, Pruritus, Insomnia, Restlessness
This is a report of a 81-year-old female patient (weight: NA) from US, suffering from the following health symptoms/conditions: NA, who was treated with Mucinex D Maximum Strength (dosage: NA, start time:
Jan 22, 2014), combined with: NA. and developed a serious reaction and side effect(s): Agitation, Pruritus, Insomnia, Restlessness after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Mucinex D Maximum Strength treatment in female patients, resulting in Agitation side effect.
Mucinex Side Effect Report#9848791
Agitation, Unevaluable Event, Diarrhoea
This report suggests a potential Mucinex Fast Max Dm Liquid Agitation side effect(s) that can have serious consequences. A 48-year-old male patient (weight: NA) from US was diagnosed with the following symptoms/conditions: NA and used Mucinex Fast Max Dm Liquid (dosage: Multiple Doses Of The Product Over A 5 Day Period; Last Took About 2 Weeks Ago) starting
Dec 28, 2013. After starting Mucinex Fast Max Dm Liquid the patient began experiencing various side effects, including: Agitation, Unevaluable Event, DiarrhoeaAdditional drugs used concurrently:
  • Risperdal
  • Synthroid
  • Metoprolol
  • Lorazepam
Although Mucinex Fast Max Dm Liquid demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Agitation, may still occur.
Mucinex Side Effect Report#9847891
Blood Glucose Increased, Vomiting
This Blood Glucose Increased problem was reported by a consumer or non-health professional from US. A 30-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On
Jan 12, 2014 this consumer started treatment with Mucinex Fast-max Severe Congestion And Cough (dosage: 20ml (1 Time) On 12-jan-2014). The following drugs were being taken at the same time:
  • Nyquil
  • Insulin
When using Mucinex Fast-max Severe Congestion And Cough, the patient experienced the following unwanted symptoms/side effects: Blood Glucose Increased, VomitingThe patient was hospitalized.Although all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Blood Glucose Increased, may become evident only after a product is in use by the general population.
Mucinex Side Effect Report#9840882
Heart Rate Decreased, Intentional Overdose, Off Label Use, Blood Pressure Increased, Headache, Vomiting, Nausea
This Heart Rate Decreased side effect was reported by a health professional from US. A 77-year-old female patient (weight:NA) experienced the following symptoms/conditions: nasopharyngitis,respiratory tract congestion,blood pressure.The patient was prescribed Mucinex Fast-max Severe Congestion And Cough (drug dosage: Drank About Six Doses; Amount Used: 3/4 Of The Bottle), which was initiated on
Jan 07, 2014. Concurrently used drugs: NA..After starting to take Mucinex Fast-max Severe Congestion And Cough the consumer reported adverse symptoms, such as: Heart Rate Decreased, Intentional Overdose, Off Label Use, Blood Pressure Increased, Headache, Vomiting, NauseaThese side effects may potentially be related to Mucinex Fast-max Severe Congestion And Cough.
Mucinex Side Effect Report#9839877
Hallucination, Gait Disturbance
This is a report of a 16-year-old male patient (weight: NA) from US, suffering from the following health symptoms/conditions: NA, who was treated with Mucinex Dm Maximum Strength (dosage: Last Took On 15-jan-2014, start time:
Jan 15, 2014), combined with: NA. and developed a serious reaction and side effect(s): Hallucination, Gait Disturbance after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Mucinex Dm Maximum Strength treatment in male patients, resulting in Hallucination side effect.
Mucinex Side Effect Report#9837870
Rectal Haemorrhage
This report suggests a potential Mucinex Fast Max Severe Congestion And Cough Liquid Rectal Haemorrhage side effect(s) that can have serious consequences. A 85-year-old female patient (weight: NA) from US was diagnosed with the following symptoms/conditions: NA and used Mucinex Fast Max Severe Congestion And Cough Liquid (dosage: NA) starting NS. After starting Mucinex Fast Max Severe Congestion And Cough Liquid the patient began experiencing various side effects, including: Rectal HaemorrhageAdditional drugs used concurrently: NA. Although Mucinex Fast Max Severe Congestion And Cough Liquid demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Rectal Haemorrhage, may still occur.
Mucinex Side Effect Report#9834064
Restlessness, Insomnia, Off Label Use
This Restlessness problem was reported by a consumer or non-health professional from US. A 44-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: influenza. On
Jan 08, 2014 this consumer started treatment with Mucinex Maximum Strength (dosage: Patient Took Last Dose At 10:00 P.m. On 09-jan-2014.). The following drugs were being taken at the same time: NA. When using Mucinex Maximum Strength, the patient experienced the following unwanted symptoms/side effects: Restlessness, Insomnia, Off Label UseAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Restlessness, may become evident only after a product is in use by the general population.
Mucinex Side Effect Report#9832991
Blood Pressure Diastolic Increased, Palpitations, Feeling Abnormal, Thirst, Dysphonia, Contraindication To Medical Treatment, Tongue Dry, Unevaluable Event, Dizziness
This Blood Pressure Diastolic Increased 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: increased upper airway secretion.The patient was prescribed Mucinex Dm Maximum Strength (drug dosage: Every 12 Hours), which was initiated on
Jan 24, 2014. Concurrently used drugs:
  • Fluoxetine
  • Zolpidem
.After starting to take Mucinex Dm Maximum Strength the consumer reported adverse symptoms, such as: Blood Pressure Diastolic Increased, Palpitations, Feeling Abnormal, Thirst, Dysphonia, Contraindication To Medical Treatment, Tongue Dry, Unevaluable Event, DizzinessThese side effects may potentially be related to Mucinex Dm Maximum Strength.
Mucinex Side Effect Report#9832559
Restlessness, Insomnia, Off Label Use
This is a report of a 47-year-old male patient (weight: NA) from US, suffering from the following health symptoms/conditions: sinus disorder,influenza, who was treated with Mucinex Maximum Strength (dosage: Patient Took Last At 10:00 P.m. On 09-jan-2014., start time:
Jan 08, 2014), combined with: NA. and developed a serious reaction and side effect(s): Restlessness, Insomnia, Off Label Use after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Mucinex Maximum Strength treatment in male patients, resulting in Restlessness side effect.
Mucinex Side Effect Report#9830272
Loss Of Consciousness, Somnolence, Dizziness
This report suggests a potential Mucinex Dm Loss Of Consciousness side effect(s) that can have serious consequences. A 64-year-old female patient (weight: NA) from US was diagnosed with the following symptoms/conditions: NA and used Mucinex Dm (dosage: 2 Tablets Every 12 Hours) starting
Jan 10, 2014. After starting Mucinex Dm the patient began experiencing various side effects, including: Loss Of Consciousness, Somnolence, DizzinessAdditional drugs used concurrently: NA. Although Mucinex Dm demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Loss Of Consciousness, may still occur.
Mucinex Side Effect Report#9820187
Grand Mal Convulsion, Hallucination, Abdominal Pain Upper, Vomiting, Disorientation, Anxiety, Muscle Twitching, Memory Impairment, Clumsiness
This Grand Mal Convulsion problem was reported by a consumer or non-health professional from US. A 61-year-old male patient (weight: NA) was diagnosed with the following symptoms/conditions: increased upper airway secretion. On
Nov 05, 2013 this consumer started treatment with Mucinex (dosage: 1 Tablet). The following drugs were being taken at the same time: NA. When using Mucinex, the patient experienced the following unwanted symptoms/side effects: Grand Mal Convulsion, Hallucination, Abdominal Pain Upper, Vomiting, Disorientation, Anxiety, Muscle Twitching, Memory Impairment, ClumsinessThe patient was hospitalized and became disabled.Although all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Grand Mal Convulsion, may become evident only after a product is in use by the general population.
Mucinex Side Effect Report#9818013
Pharyngeal Oedema, Aphagia, Dysphagia, Unevaluable Event
This Pharyngeal Oedema side effect was reported by a consumer or non-health professional from US. A 59-year-old female patient (weight:NA) experienced the following symptoms/conditions: sinusitis.The patient was prescribed Mucinex Fast Max Severe Congestion And Cough Liquid (drug dosage: NA), which was initiated on NS. Concurrently used drugs: NA..After starting to take Mucinex Fast Max Severe Congestion And Cough Liquid the consumer reported adverse symptoms, such as: Pharyngeal Oedema, Aphagia, Dysphagia, Unevaluable EventThese side effects may potentially be related to Mucinex Fast Max Severe Congestion And Cough Liquid.
Mucinex Side Effect Report#9818011
Hypoxia, Dyspnoea, Presyncope
This is a report of a 98-year-old female patient (weight: NA) from US, suffering from the following health symptoms/conditions: cough, who was treated with Mucinex Maximum Strength (dosage: Patient Took Last Dose At 09:00 A.m. On 06-jan-2014., start time:
Jan 04, 2014), combined with: NA. and developed a serious reaction and side effect(s): Hypoxia, Dyspnoea, Presyncope after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Mucinex Maximum Strength treatment in female patients, resulting in Hypoxia side effect.
Mucinex Side Effect Report#9816299
Hypersensitivity, Loss Of Consciousness, Hypertension, Throat Tightness, Swollen Tongue, Confusional State, Dyspnoea, Somnolence, Urticaria
This report suggests a potential Mucinex Sinus Max Severe Congestion Caplet Hypersensitivity side effect(s) that can have serious consequences. A 65-year-old male patient (weight: NA) from US was diagnosed with the following symptoms/conditions: NA and used Mucinex Sinus Max Severe Congestion Caplet (dosage: One Caplet. Last Used On 28-dec-2013) starting
Dec 28, 2013. After starting Mucinex Sinus Max Severe Congestion Caplet the patient began experiencing various side effects, including: Hypersensitivity, Loss Of Consciousness, Hypertension, Throat Tightness, Swollen Tongue, Confusional State, Dyspnoea, Somnolence, UrticariaAdditional drugs used concurrently: NA.The patient was hospitalized. Although Mucinex Sinus Max Severe Congestion Caplet demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Hypersensitivity, may still occur.
Mucinex Side Effect Report#9816298
Lymphadenopathy, Swollen Tongue, Glossodynia, Condition Aggravated
This Lymphadenopathy problem was reported by a consumer or non-health professional from US. A 63-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On
Jan 03, 2014 this consumer started treatment with Mucinex Dm Maximum Strength (dosage: Took 1 Tablet Orally On 03-jan-2014). The following drugs were being taken at the same time: NA. When using Mucinex Dm Maximum Strength, the patient experienced the following unwanted symptoms/side effects: Lymphadenopathy, Swollen Tongue, Glossodynia, Condition AggravatedAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Lymphadenopathy, may become evident only after a product is in use by the general population.
Mucinex Side Effect Report#9816296
Blood Pressure Decreased, Presyncope, Heart Rate Decreased, Pallor
This Blood Pressure Decreased side effect was reported by a consumer or non-health professional from US. A 74-year-old male patient (weight:NA) experienced the following symptoms/conditions: NA.The patient was prescribed Mucinex Dm Maximum Strength (drug dosage: Last Used On 31-dec-2013 At 6 Am), which was initiated on
Dec 30, 2013. Concurrently used drugs: NA..After starting to take Mucinex Dm Maximum Strength the consumer reported adverse symptoms, such as: Blood Pressure Decreased, Presyncope, Heart Rate Decreased, PallorThese side effects may potentially be related to Mucinex Dm Maximum Strength.
Mucinex Side Effect Report#9813239
Hallucination
This is a report of a 10-year-old male patient (weight: NA) from US, suffering from the following health symptoms/conditions: cough,pyrexia, who was treated with Mucinex (dosage: Taken By Mouth, start time:
Jan 08, 2014), combined with: NA. and developed a serious reaction and side effect(s): Hallucination after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Mucinex treatment in male patients, resulting in Hallucination side effect.
Mucinex Side Effect Report#9812742
Vaginal Haemorrhage, Swelling Face, Urticaria
This report suggests a potential Mucinex Fast Max Liquid Severe Cold Vaginal Haemorrhage side effect(s) that can have serious consequences. A 29-year-old female patient (weight: NA) from US was diagnosed with the following symptoms/conditions: NA and used Mucinex Fast Max Liquid Severe Cold (dosage: NA) starting
Dec 27, 2013. After starting Mucinex Fast Max Liquid Severe Cold the patient began experiencing various side effects, including: Vaginal Haemorrhage, Swelling Face, UrticariaAdditional drugs used concurrently: NA. Although Mucinex Fast Max Liquid Severe Cold demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Vaginal Haemorrhage, may still occur.
Mucinex Side Effect Report#9812740
Apnoea, Vocal Cord Disorder, Aphonia
This Apnoea problem was reported by a consumer or non-health professional from US. A 66-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: nasopharyngitis,increased upper airway secretion. On NS this consumer started treatment with Mucinex Fast Max Night Time Cold + Flu Liquid (dosage: NA). The following drugs were being taken at the same time: NA. When using Mucinex Fast Max Night Time Cold + Flu Liquid, the patient experienced the following unwanted symptoms/side effects: Apnoea, Vocal Cord Disorder, AphoniaAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Apnoea, may become evident only after a product is in use by the general population.
Mucinex Side Effect Report#9812738
Choking, Dysphagia
This Choking side effect was reported by a health professional from US. A 68-year-old female patient (weight:NA) experienced the following symptoms/conditions: NA.The patient was prescribed Mucinex Maximum Strength (drug dosage: 1 Tablet Every 12 Hours), which was initiated on
Dec 24, 2013. Concurrently used drugs: NA..After starting to take Mucinex Maximum Strength the consumer reported adverse symptoms, such as: Choking, DysphagiaThese side effects may potentially be related to Mucinex Maximum Strength.
Mucinex Side Effect Report#9812660
Genital Haemorrhage, International Normalised Ratio Abnormal
This is a report of a 79-year-old male patient (weight: NA) from US, suffering from the following health symptoms/conditions: NA, who was treated with Mucinex Dm (dosage: Last Took On 22dec2013, start time:
Dec 21, 2013), combined with:
  • Coumadin
  • Viagra
and developed a serious reaction and side effect(s): Genital Haemorrhage, International Normalised Ratio Abnormal after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Mucinex Dm treatment in male patients, resulting in Genital Haemorrhage side effect.
Mucinex Side Effect Report#9806370
Restlessness, Insomnia
This report suggests a potential Mucinex Fast-max Severe Congestion And Cough Restlessness side effect(s) that can have serious consequences. A 66-year-old female patient (weight: NA) from US was diagnosed with the following symptoms/conditions: NA and used Mucinex Fast-max Severe Congestion And Cough (dosage: Took 20ml Every 4-6 Hours) starting
Dec 25, 2013. After starting Mucinex Fast-max Severe Congestion And Cough the patient began experiencing various side effects, including: Restlessness, InsomniaAdditional drugs used concurrently: NA. Although Mucinex Fast-max Severe Congestion And Cough demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Restlessness, may still occur.
Mucinex Side Effect Report#9806368
Hypotension, Presyncope, Fall, Asthenia
This Hypotension problem was reported by a consumer or non-health professional from US. A 81-year-old male patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On
Dec 28, 2013 this consumer started treatment with Mucinex Dm Maximum Strength (dosage: NA). The following drugs were being taken at the same time:
  • Baby Acetylsalicylic Acid
When using Mucinex Dm Maximum Strength, the patient experienced the following unwanted symptoms/side effects: Hypotension, Presyncope, Fall, AstheniaThe patient was hospitalized.Although all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Hypotension, may become evident only after a product is in use by the general population.
Mucinex Side Effect Report#9806367
Hallucination, Unresponsive To Stimuli, Confusional State
This Hallucination side effect was reported by a consumer or non-health professional from US. A 87-year-old female patient (weight:NA) experienced the following symptoms/conditions: NA.The patient was prescribed Mucinex Dm (drug dosage: Patient Has Been Taking Mucinex Dm For The Last 3 Weeks.), which was initiated on NS. Concurrently used drugs:
  • Antibiotics
.After starting to take Mucinex Dm the consumer reported adverse symptoms, such as: Hallucination, Unresponsive To Stimuli, Confusional StateThese side effects may potentially be related to Mucinex Dm.
Mucinex Side Effect Report#9806366
Choking, Anxiety, Dyspnoea, Foreign Body, Vomiting
This is a report of a 75-year-old male patient (weight: NA) from US, suffering from the following health symptoms/conditions: NA, who was treated with Mucinex Maximum Strength (dosage: Patient Took Last Dose At 10:00 P.m. On 30-dec-2013. Patient Took Total Of 2 Doses., start time:
Dec 29, 2013), combined with: NA. and developed a serious reaction and side effect(s): Choking, Anxiety, Dyspnoea, Foreign Body, Vomiting after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Mucinex Maximum Strength treatment in male patients, resulting in Choking side effect.


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The appearance of Mucinex on this list does not mean that FDA has concluded that the drug has the listed risk. It means that FDA has identified a potential safety issue, but it does not mean that FDA has found a causal relationship between the drug and the listed risk.

What are common Mucinex Side Effects for Women?

Women Side EffectsReports
Dizziness 137
Blood Pressure Increased 107
Headache 78
Dyspnoea 75
Nausea 75
Epistaxis 67
Feeling Abnormal 65
Hallucination 58
Diarrhoea 49
Insomnia 48

What are common Mucinex Side Effects for Men?

Men Side EffectsReports
Epistaxis 81
Blood Pressure Increased 65
Dizziness 52
Headache 43
Hallucination 41
Insomnia 33
Nausea 31
Haemoptysis 30
Heart Rate Increased 29
Urticaria 26

Track Your Side Effects

Note Your Observations

It is really important to keep track of your health symptoms, right from the time you start a new medicine. You can do it any way you prefer: in a notebook, in a computer file or using our online tool. You should also note down any other medicines you are taking at the same time, because there could be an interaction between these medicines.

Why Your Notes are Important

Your notes could be helpful in several ways:

  • You can use them to remind you of details that may alert your health care professional(s) to a problem
  • You will have a record to refer to in the future, in case you are ever prescribed the same medicine again

  • Log Form

    You can use the following log form to write down important information, like the date and time you experienced a side effect and your symptoms, how strong the symptoms were, and any other medicines you were using.

    Medicine Name and Dosage:
    Side Effects Scale Date & Time Other Medicine(s) or Treatment(s)
    Scale: 1 = very mild to 10 = very bad

    Side effects reports are analyzed to discover potential health product safety signals. Some important reactions may take an extremely long time to develop or occur infrequently. Continued monitoring of adverse reactions is thus essential to maintain a comprehensive safety and effectiveness profile of health products.

    You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

    Mucinex reports list potential signals of serious risks and new safety information that were identified using the FDA Adverse Event Reporting System (FAERS).
    FAERS is a database that contains information on adverse event and medication errors reports submitted to FDA by healthcare professionals (such as physicians, pharmacists, nurses and others), consumers (such as patients, family members, layers and others) and manufacturers.

    Discuss Mucinex Side Effects

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    Mucinex Safety Alerts, Active Ingredients, Usage Information

    NDC17856-0008
    TypeHUMAN OTC DRUG
    Proprietary NameMucinex
    NameGuaifenesin
    Dosage FormTABLET, EXTENDED RELEASE
    RouteORAL
    On market since20120703
    LabelerAtlantic Biologicals Corps
    Active Ingredient(s)GUAIFENESIN
    Strength(s)600
    Unit(s)mg/1
    Pharma Class

    More About Mucinex

    Side Effects reported to FDA: 1290

    Mucinex safety alerts: No

    Reported deaths: 7

    Reported hospitalizations: 84

    Latest Mucinex clinical trials