Mucinex Diarrhoea Side Effect Reports


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

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


Agitation, Unevaluable Event, Diarrhoea

This Diarrhoea side effect was reported by a consumer or non-health professional from US. A 48-year-old patient (weight:NA) experienced the following symptoms/conditions: NA. The patient was prescribed Mucinex Fast Max Dm Liquid (dosage: Multiple Doses Of The Product Over A 5 Day Period; Last Took About 2 Weeks Ago), which was started on Dec 28, 2013. Concurrently used drugs:
  • Risperdal
  • Synthroid
  • Metoprolol
  • Lorazepam
When starting to take Mucinex Fast Max Dm Liquid the consumer reported the following symptoms:
  • Agitation
  • Unevaluable Event
  • Diarrhoea
These side effects may potentially be related to Mucinex Fast Max Dm Liquid.
Diarrhoea, Dizziness

This Diarrhoea Mucinex Dm Maximum Strength side effect was reported by a consumer or non-health professional from US on Oct 18, 2013. A male , 80 years of age, was treated with Mucinex Dm Maximum Strength. The patient presented the following health conditions:
  • Diarrhoea
  • Dizziness
. Mucinex Dm Maximum Strength dosage: Took One Tablet On 01-oct-2013. Last Used Product On 01-oct-2013. Additional drugs used at the same time:
  • Mucinex Fast-max Severe Congestion And Cough (Took 1 Dose On 01/oct/2013. Last Used Product On 01/oct/2013.)
Diarrhoea, Nervousness, Dizziness

This is a Mucinex side effect report of a 84-year-old female patient (weight:NA) from US, suffering from the following symptoms/conditions: NA, who was treated with Mucinex (dosage:(2 Tablets Less Than Every 12 Hours Apart Oral), start time: NS), combined with: NA., and developed a serious reaction and a Diarrhoea side effect. The patient presented with:
  • Diarrhoea
  • Nervousness
  • Dizziness
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Mucinex treatment in female patients suffering from NA, resulting in Diarrhoea.
Extrasystoles, Abdominal Pain Upper, Insomnia, Pallor, Constipation, Confusional State, Hypertension, Headache, Diarrhoea

A 69-year-old patient (weight: NA) from US with the following symptoms: NA started Mucinex Fast Max Adult Congestion + Cough treatment (dosage: NA) on Oct 08, 2012. Soon after starting Mucinex Fast Max Adult Congestion + Cough treatment, the consumer experienced several side effects, including:
  • Extrasystoles
  • Abdominal Pain Upper
  • Insomnia
  • Pallor
  • Constipation
  • Confusional State
  • Hypertension
  • Headache
  • Diarrhoea
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Mucinex Fast Max Adult Congestion + Cough side effects, such as Diarrhoea.
Depression, Anxiety, Abdominal Discomfort, Diarrhoea, Headache, Nausea

A female patient from US was prescribed and started Mucinex on Oct 30, 2012. Patient felt the following Mucinex side effects: depression, anxiety, abdominal discomfort, diarrhoea, headache, nausea Additional patient health information: Female , 57 years of age, The consumer reported the following symptoms: . Mucinex dosage: NA. Concurrently used drugs:
  • Antibiotics
Hallucination, Heart Rate Increased, Headache, Diarrhoea, Feeling Abnormal

This report suggests a potential Mucinex Dm Maximum Strength Diarrhoea side effect(s) that can have serious consequences. A 50-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 10, 2012. Soon after starting Mucinex Dm Maximum Strength the patient began experiencing various side effects, including:
  • Hallucination
  • Heart Rate Increased
  • Headache
  • Diarrhoea
  • Feeling Abnormal
Drugs used concurrently:
  • Levothyroxin
Although Mucinex Dm Maximum Strength demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Diarrhoea, may still occur.
Hallucination, Confusional State, Tremor, Chills, Dizziness, Diarrhoea, Vomiting, Nausea

An adverse event was reported by a consumer or non-health professional on Sep 13, 2012 by a Female taking Mucinex Dm Maximum Strength (dosage: Took Last Dose Of 1 Tablet On 04-sep-2012.) . Location: US , 14 years of age, weighting 147.7 lb, patient began experiencing various side effects, including: Directly after treatment started, patient experienced the unwanted or unexpected Mucinex side effects: hallucination, confusional state, tremor, chills, dizziness, diarrhoea, vomiting, nausea. Additional medications/treatments:
Blood Glucose Increased, Diarrhoea

This Diarrhoea problem was reported by a consumer or non-health professional from US. A 72-year-old female patient (weight: NA) was diagnosed with the following medical condition(s): NA.On Feb 25, 2013 a consumer started treatment with Mucinex Fast Max Adult Dm (dosage: 20 Ml Three Times Daily). The following drugs/medications were being taken at the same time: NA. When commencing Mucinex Fast Max Adult Dm, the patient experienced the following unwanted symptoms /side effects:
  • Blood Glucose Increased
  • Diarrhoea
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Diarrhoea, may become evident only after a product is in use by the general population.
Paranoia, Diarrhoea, Abdominal Discomfort, Thinking Abnormal, Somnolence, Anxiety, Off Label Use

This is a Mucinex Dm side effect report of a 23-year-old patient (weight: NA) from US. The patient developed the following symptoms/conditions: vasomotor rhinitis,productive cough and was treated with Mucinex Dm (dosage: NA) starting Nov 11, 2012. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Paranoia
  • Diarrhoea
  • Abdominal Discomfort
  • Thinking Abnormal
  • Somnolence
  • Anxiety
  • Off Label Use
This opens a possibility that Mucinex Dm could cause Diarrhoea and that some patients may be more susceptible.
Blood Glucose Increased, Diarrhoea

This Diarrhoea side effect was reported by a consumer or non-health professional from US on Nov 22, 2012. A female patient from US , 66 years of age, was treated with Mucinex. Directly after treatment started, patient experienced the unwanted or unexpected Mucinex side effects: blood glucose increased, diarrhoea. Mucinex dosage: NA. These side effects may potentially be related to Mucinex.
Anxiety, Pallor, Rash, Abdominal Pain Upper, Insomnia, Diarrhoea

This Diarrhoea side effect was reported by a consumer or non-health professional from US. A 27-year-old patient (weight:NA) experienced the following symptoms/conditions: NA. The patient was prescribed Mucinex D (guaifenesin) (dosage: Took 2 Tablets On 04-dec-2012 And 06-dec-2012), which was started on Dec 04, 2012. Concurrently used drugs: NA. When starting to take Mucinex D (guaifenesin) the consumer reported the following symptoms:
  • Anxiety
  • Pallor
  • Rash
  • Abdominal Pain Upper
  • Insomnia
  • Diarrhoea
These side effects may potentially be related to Mucinex D (guaifenesin).
Epistaxis, Decreased Appetite, Headache, Diarrhoea

This Diarrhoea Mucinex side effect was reported by a consumer or non-health professional from US on Jan 16, 2013. A Female , 77 years of age, was treated with Mucinex. The patient presented the following health conditions:
  • Epistaxis
  • Decreased Appetite
  • Headache
  • Diarrhoea
. Mucinex dosage: NA. Additional drugs used at the same time: NA.
Calcium Deficiency, Hypoaesthesia, Tremor, Yawning, Influenza, Diarrhoea

This is a Mucinex Dm Maximum Strength (guaifenesin) side effect report of a 12-year-old patient (weight:NA) from US, suffering from the following symptoms/conditions: nasal congestion,cough, who was treated with Mucinex Dm Maximum Strength (guaifenesin) (dosage:Stopped On 30-jan-2013, start time: Jan 29, 2013), combined with: NA., and developed a serious reaction and a Diarrhoea side effect. The patient presented with:
  • Calcium Deficiency
  • Hypoaesthesia
  • Tremor
  • Yawning
  • Influenza
  • Diarrhoea
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 Maximum Strength (guaifenesin) treatment in patients suffering from nasal congestion,cough, resulting in Diarrhoea.
Blood Pressure Increased, Diarrhoea, Headache

A 61-year-old female patient (weight: NA) from US with the following symptoms: NA started Mucinex Maximum Strength treatment (dosage: NA) on Feb 01, 2013. Soon after starting Mucinex Maximum Strength treatment, the consumer experienced several side effects, including:
  • Blood Pressure Increased
  • Diarrhoea
  • Headache
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Mucinex Maximum Strength side effects, such as Diarrhoea.
Blood Pressure Increased, Diarrhoea, Headache

A female patient from US was prescribed and started Mucinex Maximum Strength on Feb 19, 2013. After Mucinex was administered, patient encountered several Mucinex side effects: blood pressure increased, diarrhoea, headache Additional patient health information: Female , 61 years of age, The consumer reported the following symptoms: . Mucinex Maximum Strength dosage: NA. Concurrently used drugs: NA.
Diarrhoea, Hypertension, Lung Infection

This report suggests a potential Mucinex Diarrhoea side effect(s) that can have serious consequences. A 80-year-old female patient from UNITED STATES (weight:NA) was diagnosed with the following health condition(s): NA and used Mucinex (dosage: NA) starting May 24, 2012. Soon after starting Mucinex the patient began experiencing various side effects, including:
  • Diarrhoea
  • Hypertension
  • Lung Infection
Drugs used concurrently:
  • Detrol La
The patient was hospitalized. Although Mucinex demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Diarrhoea, may still occur.
Toxicity To Various Agents, Ill-defined Disorder, Arrhythmia, Cardiac Disorder, Alcohol Abuse, Peripheral Arterial Occlusive Disease, Diarrhoea, Myalgia, Pulmonary Oedema

An adverse event was reported by a consumer or non-health professional on May 03, 2012 by a male taking Mucinex (dosage: NA) . Location: UNITED STATES , weighting 162.0 lb, patient began experiencing various side effects, including: Patient felt the following Mucinex side effects: toxicity to various agents, ill-defined disorder, arrhythmia, cardiac disorder, alcohol abuse, peripheral arterial occlusive disease, diarrhoea, myalgia, pulmonary oedema. Additional medications/treatments:
Multiple prescriptions taken:
  • Cartia Xt
  • Cortisone Acetate
  • Coreg
  • Spiriva
  • Nyquil
  • Digoxin
  • Levaquin
  • Astelin
The patient was hospitalized and became disabled.
Dyspnoea, Paraesthesia, Diarrhoea, Abdominal Pain Upper

This Diarrhoea problem was reported by a consumer or non-health professional from UNITED STATES. A 51-year-old female patient (weight: NA) was diagnosed with the following medical condition(s): NA.On May 01, 2012 a consumer started treatment with Mucinex Dm (dosage: NA). 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:
  • Dyspnoea
  • Paraesthesia
  • Diarrhoea
  • Abdominal Pain Upper
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Diarrhoea, may become evident only after a product is in use by the general population.
Gastrointestinal Sounds Abnormal, Productive Cough, Cellulitis, Asthenia, Abdominal Distension, Intestinal Obstruction, Diarrhoea, Intestinal Dilatation, Septic Shock

This is a Mucinex side effect report of a 63-year-old patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Mucinex (dosage: NA) starting Dec 13, 2011. Concurrently used drugs:
  • Arzerra (2000mg Weekly)
  • Flomax (.4mg Per Day)
  • Imodium
  • Decadron
  • Allegra (180mg Per Day)
  • Acidophilus
  • Temazepam (30mg At Night)
Soon after that, the consumer experienced the following of symptoms:
  • Gastrointestinal Sounds Abnormal
  • Productive Cough
  • Cellulitis
  • Asthenia
  • Abdominal Distension
  • Intestinal Obstruction
  • Diarrhoea
  • Intestinal Dilatation
  • Septic Shock
The patient was hospitalized and became disabled. This opens a possibility that Mucinex could cause Diarrhoea and that some patients may be more susceptible.
Abdominal Pain Upper, Hallucination, Hyperhidrosis, Diarrhoea

This Diarrhoea side effect was reported by a consumer or non-health professional from UNITED STATES on May 03, 2012. A patient from UNITED STATES , 72 years of age, was treated with Mucinex. Patient felt the following Mucinex side effects: abdominal pain upper, hallucination, hyperhidrosis, diarrhoea. Mucinex dosage: Took 20 Ml Once Or Twice Daily, As Needed. These side effects may potentially be related to Mucinex.
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DISCLAIMER: ALL DATA PROVIDED AS-IS, refer to terms of use for additional information.

Mucinex Diarrhoea Causes and Reviews


What is
diarrhea ?

Diarrhea is loose, watery stools (bowel movements). You have diarrhea if you have loose stools three or more times in one day. Acute diarrhea is diarrhea that lasts a short time. It is a common problem. It usually lasts about one or two days, but it may last longer. Then it goes away on its own.

Diarrhea lasting more than a few days may be a sign of a more serious problem. Chronic diarrhea -- diarrhea that lasts at least four weeks -- can be a symptom of a chronic disease. Chronic diarrhea symptoms may be continual, or they may come and go.

Who gets diarrhea ?

People of all ages can get diarrhea. On average, adults In the United States have acute diarrhea once a year. Young children have it an average of twice a year.

People who visit developing countries are at risk for traveler's diarrhea. It is caused by consuming contaminated food or water.

What causes diarrhea ?

The most common causes of diarrhea include

  • Bacteria from contaminated food or water
  • Viruses such as the flu, norovirus, or rotavirus . Rotavirus is the most common cause of acute diarrhea in children.
  • Parasites, which are tiny organisms found in contaminated food or water
  • Medicines such as antibiotics, cancer drugs, and antacids that contain magnesium
  • Food intolerances and sensitivities, which are problems digesting certain ingredients or foods. An example is lactose intolerance.
  • Diseases that affect the stomach, small intestine, or colon, such as Crohn's disease
  • Problems with how the colon functions, such as irritable bowel syndrome

Some people also get diarrhea after stomach surgery, because sometimes the surgeries can cause food to move through your digestive system more quickly.

Sometimes no cause can be found. If your diarrhea goes away within a few days, finding the cause is usually not necessary.

What other symptoms might I have with diarrhea ?

Other possible symptoms of diarrhea include

  • Cramps or pain in the abdomen
  • An urgent need to use the bathroom
  • Loss of bowel control

If a virus or bacteria is the cause of your diarrhea, you may also have a fever, chills, and bloody stools.

Diarrhea can cause dehydration, which means that your body does not have enough fluid to work properly. Dehydration can be serious, especially for children, older adults, and people with weakened immune systems.

When should I see a doctor for diarrhea ?

Although it is usually not harmful, diarrhea can become dangerous or signal a more serious problem. Contact your health care provider if you have

  • Signs of dehydration
  • Diarrhea for more than 2 days, if you are an adult. For children, contact the provider if it lasts more than 24 hours.
  • Severe pain in your abdomen or rectum (for adults)
  • A fever of 102 degrees or higher
  • Stools containing blood or pus
  • Stools that are black and tarry

If children have diarrhea, parents or caregivers should not hesitate to call a health care provider. Diarrhea can be especially dangerous in newborns and infants.

How is the cause of diarrhea diagnosed?

To find the cause of diarrhea, your health care provider may

  • Do a physical exam
  • Ask about any medicines you are taking
  • Test your stool or blood to look for bacteria, parasites, or other signs of disease or infection
  • Ask you to stop eating certain foods to see whether your diarrhea goes away

If you have chronic diarrhea, your health care provider may perform other tests to look for signs of disease.

What are the treatments for diarrhea ?

Diarrhea is treated by replacing lost fluids and electrolytes to prevent dehydration. Depending on the cause of the problem, you may need medicines to stop the diarrhea or treat an infection.

Adults with diarrhea should drink water, fruit juices, sports drinks, sodas without caffeine, and salty broths. As your symptoms improve, you can eat soft, bland food.

Children with diarrhea should be given oral rehydration solutions to replace lost fluids and electrolytes.

Can diarrhea be prevented?

Two types of diarrhea can be prevented - rotavirus diarrhea and traveler's diarrhea. There are vaccines for rotavirus. They are given to babies in two or three doses.

You can help prevent traveler's diarrhea by being careful about what you eat and drink when you are in developing countries:

  • Use only bottled or purified water for drinking, making ice cubes, and brushing your teeth
  • If you do use tap water, boil it or use iodine tablets
  • Make sure that the cooked food you eat is fully cooked and served hot
  • Avoid unwashed or unpeeled raw fruits and vegetables

NIH: National Institute of Diabetes and Digestive and Kidney Diseases


Mucinex Diarrhoea 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 (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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Discuss Mucinex Side Effects