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Heart Palpitations (258)
Dizziness (212)
Diarrhea (190)
Sleeplessness (176)
Pounding Heart (87)
Sleepiness (84)
Sleeplessness, Heart Palpitations (60)
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Mucinex Side Effects and Adverse Effects reported to US Food and Drug Administration (FDA)

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Showing 1-25 of 899 

Palpitations, Malaise, Insomnia (8328846-8)
on Sep 20, 2010 Female from UNITED STATES , weighting 168.2 lb, was diagnosed with
  • malaise
  • hypersomnia
  • sleep apnoea syndrome
and was treated with Mucinex. Directly after, patient experienced the unwanted or unexpected Mucinex side effects: palpitations, malaise, insomnia. Mucinex dosage: N/A.
Associated medications used:
  • Nuvigil
  • Nuvigil (250 Milligram;)


Swelling Face, Oedema Peripheral, Throat Tightness, Accidental Overdose (8328535-X)
Patient was taking Mucinex. Patient felt the following Mucinex side effects: swelling face, oedema peripheral, throat tightness, accidental overdose on Apr 26, 2012 from UNITED STATES Additional patient health information: Female , 62 years of age, . Mucinex dosage: Ended Up Taking 3 Possibly 4 Tablets On Thurday 19-apr-2012 Within 12 Hours..

Epistaxis (8324818-8)
Adverse event was reported on Apr 27, 2012 by a Male taking Mucinex (Dosage: Took Two Doses) . Location: UNITED STATES , 13 years of age, After Mucinex was administered, patient encountered several Mucinex side effects: epistaxis.

Retching, Memory Impairment, Pneumonia, Confusional State, Somnolence, Fatigue (8324817-6)
on Apr 24, 2012 Male from UNITED STATES , 77 years of age, was treated with Mucinex. Directly after, patient experienced the unwanted or unexpected Mucinex side effects: retching, memory impairment, pneumonia, confusional state, somnolence, fatigue. Mucinex dosage: Took 1 Tablet At 2.15pm On 15-apr-2012. Patient was hospitalized.


Blood Pressure Increased, Feeling Abnormal (8321503-3)
on Apr 30, 2012 Male from UNITED STATES , 58 years of age, weighting 150.0 lb, was diagnosed with
  • cough
and was treated with Mucinex Dm. Patient felt the following Mucinex side effects: blood pressure increased, feeling abnormal. Mucinex Dm dosage: N/A.

Lip Swelling, Urticaria, Off Label Use, Rash, Erythema Infectiosum, Hypersensitivity (8310215-8)
Patient was taking Mucinex. After Mucinex was administered, patient encountered several Mucinex side effects: lip swelling, urticaria, off label use, rash, erythema infectiosum, hypersensitivity on Apr 20, 2012 from UNITED STATES Additional patient health information: Female , child 3 years of age, weighting 39.68 lb, was diagnosed with
  • asthma
and. Mucinex dosage: N/A.

Hallucination (8303903-0)
Adverse event was reported on Apr 19, 2012 by a Male taking Mucinex Cough Mini Melts Orange (Dosage: 04.18.12 1 Packet Every 4 Hours Or More) . Location: UNITED STATES , child 6 years of age, Directly after, patient experienced the unwanted or unexpected Mucinex side effects: hallucination.

Syncope, Dizziness (8303702-X)
on Apr 19, 2012 Female from UNITED STATES , 68 years of age, was treated with Mucinex Dm. Patient felt the following Mucinex side effects: syncope, dizziness. Mucinex Dm dosage: N/A.

Lip Dry, Epistaxis (8300760-3)
on Apr 12, 2012 Male from UNITED STATES , 70 years of age, was diagnosed with
  • nasal congestion
and was treated with Mucinex D. After Mucinex was administered, patient encountered several Mucinex side effects: lip dry, epistaxis. Mucinex D dosage: Consumer Used Product Over The Last 6-7 Months As Needed 1 Tab At Night.

Injury, Oedema Peripheral, Pulmonary Embolism, Fatigue, Deep Vein Thrombosis, Erythema (8297097-8)
Patient was taking Mucinex. Directly after, patient experienced the unwanted or unexpected Mucinex side effects: injury, oedema peripheral, pulmonary embolism, fatigue, deep vein thrombosis, erythema on Apr 11, 2012 from UNITED STATES Additional patient health information: Female , 38 years of age, . Mucinex dosage: 600 Mg, Qd.
Associated medications used:
  • Drospirenone And Ethinyl Estradiol (Unk)
  • Wellbutrin (300 Mg, Qd)
  • Metformin Hcl (1000 Mg, Qd)
  • Albuterol
Patient was hospitalized.

Epistaxis, Lip Dry (8289556-9)
Adverse event was reported on Apr 11, 2012 by a Male taking Mucinex D (Dosage: Consumer Used Product Over The Last 6-7 Months As Needed 1 Tab At Night) was diagnosed with
  • nasal congestion
and. Location: UNITED STATES , 70 years of age, Patient felt the following Mucinex side effects: epistaxis, lip dry.

Diarrhoea (8287302-6)
on Apr 16, 2012 Male from UNITED STATES , 55 years of age, weighting 165.0 lb, was diagnosed with
  • hypersensitivity
and was treated with Mucinex Dm. After Mucinex was administered, patient encountered several Mucinex side effects: diarrhoea. Mucinex Dm dosage: N/A.

Mucosal Haemorrhage (8281996-7)
on Apr 11, 2012 Female from UNITED STATES , 69 years of age, was treated with Mucinex Dm. Directly after, patient experienced the unwanted or unexpected Mucinex side effects: mucosal haemorrhage. Mucinex Dm dosage: N/A.

Urticaria, Lip Swelling (8281751-8)
Patient was taking Mucinex Dm. Patient felt the following Mucinex side effects: urticaria, lip swelling on Apr 09, 2012 from UNITED STATES Additional patient health information: Male , 57 years of age, . Mucinex Dm dosage: N/A.

Swelling Face, Lip Swelling, Oedema Mouth (8276656-2)
Adverse event was reported on Apr 09, 2012 by a Male taking Mucinex Dm (Dosage: N/A) . Location: UNITED STATES , 54 years of age, After Mucinex was administered, patient encountered several Mucinex side effects: swelling face, lip swelling, oedema mouth.

Dizziness, Abdominal Pain Upper, Feeling Hot, Blood Pressure Increased, Hypersensitivity, Nausea, Urticaria (8276655-0)
on Apr 09, 2012 Male from UNITED STATES , 72 years of age, was treated with Mucinex Dm. Directly after, patient experienced the unwanted or unexpected Mucinex side effects: dizziness, abdominal pain upper, feeling hot, blood pressure increased, hypersensitivity, nausea, urticaria. Mucinex Dm dosage: 3 Months Ago, Right Before Christmas, Took ^a Few^ Tablets.
Associated medications used:
  • Insulin
  • Amitriptyline Hydrochloride
  • Aspirin


Anion Gap Increased, Renal Tubular Acidosis, Tachycardia, Flank Pain, Nephrolithiasis (8276408-3)
on Apr 05, 2012 Female from UNITED STATES , 42 years of age, was treated with Mucinex D. Patient felt the following Mucinex side effects: anion gap increased, renal tubular acidosis, tachycardia, flank pain, nephrolithiasis. Mucinex D dosage: She Had Been Ingesting 3 To 4 Grams Daily. Patient was hospitalized.

Anaphylactic Reaction, Swollen Tongue, Dyspnoea, Pharyngeal Oedema (8261197-9)
Patient was taking Mucinex. After Mucinex was administered, patient encountered several Mucinex side effects: anaphylactic reaction, swollen tongue, dyspnoea, pharyngeal oedema on Mar 30, 2012 from UNITED STATES Additional patient health information: Male , child 11 years of age, . Mucinex dosage: Took One 5ml Dose. Patient was hospitalized.

Nausea, Memory Impairment, Confusional State, Hallucination (8260819-6)
Adverse event was reported on Mar 30, 2012 by a Female taking Mucinex (Dosage: N/A) . Location: UNITED STATES , 71 years of age, Directly after, patient experienced the unwanted or unexpected Mucinex side effects: nausea, memory impairment, confusional state, hallucination.

Dyspnoea, Pharyngeal Oedema, Anaphylactic Reaction, Swollen Tongue (8259298-4)
on Mar 29, 2012 Male from UNITED STATES , child 11 years of age, was treated with Mucinex. Patient felt the following Mucinex side effects: dyspnoea, pharyngeal oedema, anaphylactic reaction, swollen tongue. Mucinex dosage: 03.27.12 5-10ml As Recommended. Patient was hospitalized.

Arthralgia, Otorrhoea, Hypoacusis, Pneumonia, Chest Pain, Pyrexia, Dehydration, Dizziness, Chills (8257844-8)
on Mar 20, 2012 Male from UNITED STATES , weighting 238.1 lb, was treated with Mucinex. After Mucinex was administered, patient encountered several Mucinex side effects: arthralgia, otorrhoea, hypoacusis, pneumonia, chest pain, pyrexia, dehydration, dizziness, chills. Mucinex dosage: N/A.
Multiple concurrent drugs taken:
  • Levaquin (Once)
  • Zolpidem Tartrate (Once A Day)
  • Guaifenesin
  • Sodium Chloride (As Needed)
  • Ceftriaxone Sodium (Once)
  • Sodium Chloride 0.9%
Patient was hospitalized.

Exposure During Breast Feeding, Flight Of Ideas, Weight Decreased, Feeling Drunk, Mydriasis (8256303-6)
Patient was taking Mucinex. Directly after, patient experienced the unwanted or unexpected Mucinex side effects: exposure during breast feeding, flight of ideas, weight decreased, feeling drunk, mydriasis on Mar 26, 2012 from UNITED STATES Additional patient health information: Female , 28 years of age, . Mucinex dosage: Over 8 Years In Amounts Of Up To 40 Tablets A Day.

Epistaxis (8256301-2)
Adverse event was reported on Mar 27, 2012 by a Female taking Mucinex (Dosage: 02.2012 2 Different Occasions. Sprayed Into Each Nostril Once.) . Location: UNITED STATES , 52 years of age, Patient felt the following Mucinex side effects: epistaxis.

Hallucination, Nausea, Memory Impairment, Confusional State (8255987-6)
on Mar 26, 2012 Female from UNITED STATES , 71 years of age, was treated with Mucinex. After Mucinex was administered, patient encountered several Mucinex side effects: hallucination, nausea, memory impairment, confusional state. Mucinex dosage: N/A.

Testicular Disorder (8252931-2)
on Jan 27, 2012 Male from UNITED STATES , weighting 170.2 lb, was treated with Mucinex. Directly after, patient experienced the unwanted or unexpected Mucinex side effects: testicular disorder. Mucinex dosage: N/A.
Associated medications used:
  • Androgel (Now 5 Packets A Day Of 1%)
  • Hydromorphone Hcl
  • Androgel


Showing 1-25 of 899 

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Most drugs have a large list of nonsevere or mild adverse effects which do not rule out continued usage. These effects depend on individual sensitivity, and can include nausea, dizziness, diarrhea, malaise, vomiting, headache, dermatitis, dry mouth, etc. Check commonly reported side effects . These can be considered a form of pseudo-allergic reaction, as not all users experience these effects; many users experience none at all.

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 Information

Alternative MUCINEX Names:ACETAMINO DEXTROMET GUAIFENES OXYMETAZO

Active Ingredient: ACETAMINO DEXTROMET GUAIFENES OXYMETAZO

More About Mucinex

Side Effects reported to FDA: 899. View Mucinex Adverse Reports

Mucinex safety alerts: No

Reported deaths: 6

Reported hospitalizations: 74

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