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Mucinex Lethargy Side Effects

Mucinex Lethargy Side Effect Reports


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

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



Tachycardia, Confusional State, Tremor, Lethargy, Asthenia, Diplopia, Appetite Disorder, Suicide Attempt, Intentional Overdose

This Lethargy side effect was reported by a consumer or non-health professional from US. A 13-year-old female patient (weight:NA) experienced the following symptoms/conditions: suicide attempt. The patient was prescribed Mucinex Dm (dosage: Patient Took 5 Tablets By Mouth, One Time), which was started on May 11, 2013. Concurrently used drugs: NA. When starting to take Mucinex Dm the consumer reported the following symptoms:
  • Tachycardia
  • Confusional State
  • Tremor
  • Lethargy
  • Asthenia
  • Diplopia
  • Appetite Disorder
  • Suicide Attempt
  • Intentional Overdose
These side effects may potentially be related to Mucinex Dm.
Haemoptysis, Dizziness, Lethargy, Hyperhidrosis, Disorientation, Confusional State, Unevaluable Event

This Lethargy Mucinex Dm Maximum Strength side effect was reported by a consumer or non-health professional from US on Apr 10, 2013. A male , 41 years of age, was treated with Mucinex Dm Maximum Strength. The patient presented the following health conditions:
  • Haemoptysis
  • Dizziness
  • Lethargy
  • Hyperhidrosis
  • Disorientation
  • Confusional State
  • Unevaluable Event
. Mucinex Dm Maximum Strength dosage: 1 Dose On 27-mar-2013 And Another Dose On 28-mar-2013 1 Tablet 5pm. Additional drugs used at the same time: NA.
Depression, Memory Impairment, Crying, Lethargy

This is a Mucinex Dm Maximum Strength (guaifenesin) side effect report of a 38-year-old female patient (weight:NA) from US, suffering from the following symptoms/conditions: NA, who was treated with Mucinex Dm Maximum Strength (guaifenesin) (dosage:Last Took On 16-feb-2103, start time: Feb 08, 2013), combined with:
  • Mucinex Dm Maximum Strength (dextromethorphan Hydrobromide)
  • Tussin
  • Abilify
  • Lithium
  • Lexapro
  • Benzatropine
, and developed a serious reaction and a Lethargy side effect. The patient presented with:
  • Depression
  • Memory Impairment
  • Crying
  • Lethargy
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Mucinex Dm Maximum Strength (guaifenesin) treatment in female patients suffering from NA, resulting in Lethargy.

Anaemia, Viral Infection, Lethargy, Headache, Dehydration

A 83-year-old female patient (weight: NA) from UNITED STATES with the following symptoms: NA started Mucinex Dm treatment (dosage: Patient Took Two Tablets) on Mar 13, 2012. Soon after starting Mucinex Dm treatment, the consumer experienced several side effects, including:
  • Anaemia
  • Viral Infection
  • Lethargy
  • Headache
  • Dehydration
. Concurrently used drugs:
  • Plavix
  • Carbidopa
  • Levodopa
The patient was hospitalized. This finding indicates that some patients can be more vulnerable to developing Mucinex Dm side effects, such as Lethargy.
Lethargy, Mucosal Haemorrhage, Nausea, Epistaxis, Urticaria, Headache

A patient from UNITED STATES was prescribed and started Mucinex on Feb 03, 2012. Patient felt the following Mucinex side effects: lethargy, mucosal haemorrhage, nausea, epistaxis, urticaria, headache 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.
Lethargy, Epistaxis, Urticaria, Mucosal Haemorrhage, Headache, Nausea

This report suggests a potential Mucinex Lethargy side effect(s) that can have serious consequences. A 65-year-old patient from UNITED STATES (weight:NA) was diagnosed with the following health condition(s): NA and used Mucinex (dosage: Started A Month Ago, 1-2 600mg Tablets/day) starting NS. Soon after starting Mucinex the patient began experiencing various side effects, including:
  • Lethargy
  • Epistaxis
  • Urticaria
  • Mucosal Haemorrhage
  • Headache
  • Nausea
Drugs used concurrently:NA. Although Mucinex demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Lethargy, may still occur.
Headache, Mucosal Haemorrhage, Epistaxis, Lethargy, Urticaria, Nausea

An adverse event was reported by a consumer or non-health professional on Feb 03, 2012 by a male taking Mucinex (dosage: Started A Month Ago, 1-2 600mg Tablets/day) . Location: UNITED STATES , 65 years of age, patient began experiencing various side effects, including: Directly after treatment started, patient experienced the unwanted or unexpected Mucinex side effects: headache, mucosal haemorrhage, epistaxis, lethargy, urticaria, nausea. Additional medications/treatments:
Headache, Lethargy, Urticaria, Epistaxis, Nausea, Mucosal Haemorrhage

This Lethargy problem was reported by a consumer or non-health professional from UNITED STATES. A 65-year-old patient (weight: NA) was diagnosed with the following medical condition(s): NA.On NS a consumer started treatment with Mucinex (dosage: Started A Month Ago, 1-2 600mg Tablets/day). The following drugs/medications were being taken at the same time: NA. When commencing Mucinex, the patient experienced the following unwanted symptoms /side effects:
  • Headache
  • Lethargy
  • Urticaria
  • Epistaxis
  • Nausea
  • Mucosal Haemorrhage
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Lethargy, may become evident only after a product is in use by the general population.
Epistaxis, Headache, Urticaria, Nausea, Mucosal Haemorrhage, Lethargy

This is a Mucinex side effect report of a 65-year-old patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Mucinex (dosage: Started A Month Ago, 1-2 600mg Tablets/day) starting NS. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Epistaxis
  • Headache
  • Urticaria
  • Nausea
  • Mucosal Haemorrhage
  • Lethargy
This opens a possibility that Mucinex could cause Lethargy and that some patients may be more susceptible.
Epistaxis, Lethargy, Nausea, Mucosal Haemorrhage, Urticaria, Headache

This Lethargy side effect was reported by a consumer or non-health professional from UNITED STATES on Feb 03, 2012. A patient from UNITED STATES , 65 years of age, was treated with Mucinex. Directly after treatment started, patient experienced the unwanted or unexpected Mucinex side effects: epistaxis, lethargy, nausea, mucosal haemorrhage, urticaria, headache. Mucinex dosage: Started A Month Ago, 1-2 600mg Tablets/day. These side effects may potentially be related to Mucinex.
Urticaria, Headache, Mucosal Haemorrhage, Lethargy, Nausea, Epistaxis

This Lethargy side effect was reported by a consumer or non-health professional from UNITED STATES. A 65-year-old patient (weight:NA) experienced the following symptoms/conditions: NA. The patient was prescribed Mucinex (dosage: Started A Month Ago, 1-2 600mg Tablets/day), which was started on NS. Concurrently used drugs: NA. When starting to take Mucinex the consumer reported the following symptoms:
  • Urticaria
  • Headache
  • Mucosal Haemorrhage
  • Lethargy
  • Nausea
  • Epistaxis
These side effects may potentially be related to Mucinex.
Urticaria, Mucosal Haemorrhage, Epistaxis, Headache, Lethargy, Nausea

This Lethargy Mucinex side effect was reported by a consumer or non-health professional from UNITED STATES on Feb 03, 2012. A male , 65 years of age, was treated with Mucinex. The patient presented the following health conditions:
  • Urticaria
  • Mucosal Haemorrhage
  • Epistaxis
  • Headache
  • Lethargy
  • Nausea
. Mucinex dosage: Started A Month Ago, 1-2 600mg Tablets/day. Additional drugs used at the same time: NA.
Epistaxis, Headache, Urticaria, Mucosal Haemorrhage, Lethargy, Nausea

This is a Mucinex side effect report of a 65-year-old patient (weight:NA) from UNITED STATES, suffering from the following symptoms/conditions: NA, who was treated with Mucinex (dosage:Started A Month Ago, 1-2 600mg Tablets/day, start time: NS), combined with: NA., and developed a serious reaction and a Lethargy side effect. The patient presented with:
  • Epistaxis
  • Headache
  • Urticaria
  • Mucosal Haemorrhage
  • Lethargy
  • Nausea
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Mucinex treatment in patients suffering from NA, resulting in Lethargy.
Lethargy, Headache, Fatigue, Urticaria, Rhinorrhoea, Epistaxis, Nausea, Mucosal Haemorrhage

A 65-year-old patient (weight: NA) from UNITED STATES with the following symptoms: NA started Mucinex treatment (dosage: Started A Month Ago, 1-2 600mg Tablets/day) on NS. Soon after starting Mucinex treatment, the consumer experienced several side effects, including:
  • Lethargy
  • Headache
  • Fatigue
  • Urticaria
  • Rhinorrhoea
  • Epistaxis
  • Nausea
  • Mucosal Haemorrhage
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Mucinex side effects, such as Lethargy.
Epistaxis, Urticaria, Mucosal Haemorrhage, Lethargy, Headache, Nausea

A patient from UNITED STATES was prescribed and started Mucinex on Feb 03, 2012. After Mucinex was administered, patient encountered several Mucinex side effects: epistaxis, urticaria, mucosal haemorrhage, lethargy, headache, nausea 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.
Epistaxis, Lethargy, Urticaria, Mucosal Haemorrhage, Headache, Nausea

This report suggests a potential Mucinex Lethargy side effect(s) that can have serious consequences. A 65-year-old patient from UNITED STATES (weight:NA) was diagnosed with the following health condition(s): NA and used Mucinex (dosage: Started A Month Ago, 1-2 600mg Tablets/day) starting NS. Soon after starting Mucinex the patient began experiencing various side effects, including:
  • Epistaxis
  • Lethargy
  • Urticaria
  • Mucosal Haemorrhage
  • Headache
  • Nausea
Drugs used concurrently:NA. Although Mucinex demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Lethargy, may still occur.
Lethargy, Mucosal Haemorrhage, Headache, Nausea, Urticaria, Epistaxis

An adverse event was reported by a consumer or non-health professional on Feb 03, 2012 by a male taking Mucinex (dosage: Started A Month Ago, 1-2 600mg Tablets/day) . Location: UNITED STATES , 65 years of age, patient began experiencing various side effects, including: Patient felt the following Mucinex side effects: lethargy, mucosal haemorrhage, headache, nausea, urticaria, epistaxis. Additional medications/treatments:
Lethargy, Mucosal Haemorrhage, Epistaxis, Urticaria, Nausea, Headache

This Lethargy problem was reported by a consumer or non-health professional from UNITED STATES. A 65-year-old patient (weight: NA) was diagnosed with the following medical condition(s): NA.On NS a consumer started treatment with Mucinex (dosage: Started A Month Ago, 1-2 600mg Tablets/day). The following drugs/medications were being taken at the same time: NA. When commencing Mucinex, the patient experienced the following unwanted symptoms /side effects:
  • Lethargy
  • Mucosal Haemorrhage
  • Epistaxis
  • Urticaria
  • Nausea
  • Headache
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Lethargy, may become evident only after a product is in use by the general population.
Epistaxis, Urticaria, Mucosal Haemorrhage, Headache, Nausea, Lethargy

This is a Mucinex side effect report of a 65-year-old patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Mucinex (dosage: Started A Month Ago, 1-2 600mg Tablets/day) starting NS. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Epistaxis
  • Urticaria
  • Mucosal Haemorrhage
  • Headache
  • Nausea
  • Lethargy
This opens a possibility that Mucinex could cause Lethargy and that some patients may be more susceptible.
Nausea, Mucosal Haemorrhage, Epistaxis, Headache, Lethargy, Urticaria

This Lethargy side effect was reported by a consumer or non-health professional from UNITED STATES on Feb 02, 2012. A patient from UNITED STATES , 65 years of age, was treated with Mucinex. Patient felt the following Mucinex side effects: nausea, mucosal haemorrhage, epistaxis, headache, lethargy, urticaria. Mucinex dosage: Started A Month Ago, 1-2 600mg Tablets/day. These side effects may potentially be related to Mucinex.

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

Mucinex Lethargy Causes and Reviews


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Mucinex Lethargy 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 (323)
Blood Pressure Increased (225)
Headache (181)
Epistaxis (169)
Nausea (163)
Feeling Abnormal (158)
Heart Rate Increased (127)
Diarrhoea (124)
Hallucination (120)
Insomnia (114)
Dyspnoea (109)
Anxiety (108)
Vomiting (84)
Hypertension (73)
Confusional State (69)
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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