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Metamucil Side Effects

Common Metamucil Side Effects


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

Vomiting (17)
Dyspnoea (11)
Nausea (11)
Abdominal Distension (11)
Abdominal Pain Upper (11)
Diarrhoea (10)
Choking (10)
Asthenia (9)
Foreign Body Trauma (9)
Intestinal Obstruction (7)
Abdominal Discomfort (7)
Dysphagia (7)
Malaise (6)
Loss Of Consciousness (6)
Constipation (6)
Cholecystitis (5)
Discomfort (5)
Pain (5)
Fatigue (5)
Weight Decreased (4)

➢ 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.

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.

Metamucil Side Effects Reported to FDA

The following Metamucil 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.


The appearance of Metamucil 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.
Cough, Migraine, Chills, Arthralgia, Asthenia
This is a report of a 15-year-old male patient (weight: NA) from US, suffering from the following symptoms/conditions: weight increased, who was treated with Metamucil /00029101/ (dosage: 2 Teaspoons Powder Once Daily Mixed Into Drink, start time: NS), combined with: NA. and developed a serious reaction and side effect(s). The consumer presented with:
  • Cough
  • Migraine
  • Chills
  • Arthralgia
  • Asthenia
which developed after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Metamucil /00029101/ treatment in male patients, resulting in cough side effect.

Throat Tightness, Abdominal Pain Upper
This report suggests a potential Metamucil Throat Tightness, Abdominal Pain Upper side effect(s) that can have serious consequences. A 46-year-old female patient (weight: NA) from US was diagnosed with the following symptoms/conditions: NA and used Metamucil (dosage: 1 Tbsp, 1 Only In 8 Oz Water, Oral) starting Jul 15, 2013. Soon after starting Metamucil the patient began experiencing various side effects, including:
  • Throat Tightness
  • Abdominal Pain Upper
Drugs used concurrently:
  • Epipen /00003901/ (epinephrine)
  • Ventolin Hfa (salbutamol Sulfate)
  • Singulair /01362601/ (montelukast)
  • Potassium (potassium)
  • Wellbutrin /00700501/ (bupropion)
  • Busirone (buspirone Hydrochloride)
  • Citalopram (citalopram)
  • Anilori
Although Metamucil demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as throat tightness, may still occur.

Shock, Gastrointestinal Obstruction, Hypotension, Vomiting, Cold Sweat, Abdominal Pain Upper, Feeling Cold, Product Physical Issue
This Shock, Gastrointestinal Obstruction, Hypotension, Vomiting, Cold Sweat, Abdominal Pain Upper, Feeling Cold, Product Physical Issue problem was reported by a consumer or non-health professional from US. A 77-year-old male patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On NS this consumer started treatment with Metamucil (dosage: 1tsp 1d, Oral). The following drugs were being taken at the same time: NA. When commencing Metamucil, the patient experienced the following unwanted symptoms/side effects:
  • Shock
  • Gastrointestinal Obstruction
  • Hypotension
  • Vomiting
  • Cold Sweat
  • Abdominal Pain Upper
  • Feeling Cold
  • Product Physical Issue
The 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 shock, may become evident only after a product is in use by the general population.

Chest Pain, Blood Test Abnormal
This is a report of a 73-year-old male patient (weight: NA) from US. The patient developed the following symptoms/conditions: diverticulum and was treated with Metamucil Sugar-free Smooth Texture, Orange Flavor (psyllium Hydrophilic Mucilloid 3.4 G) Powder For (dosage: 1 Tsp, In 8 Ounces Of Water When Needed, Oral) starting NS. Concurrently used drugs:
  • Ramipro (ramipril)
  • Crestor /01588601/ (rosuvastatin)
Soon after that, the consumer experienced the following side effects:
  • Chest Pain
  • Blood Test Abnormal
The patient was hospitalized. This opens a possibility that Metamucil Sugar-free Smooth Texture, Orange Flavor (psyllium Hydrophilic Mucilloid 3.4 G) Powder For treatment could cause the above reactions, including chest pain, and some male subjects may be more susceptible.


Gastrointestinal Obstruction, Dehydration
A 91-year-old female patient (weight: NA) from US with the following symptoms/conditions: NA started Metamucil treatment (dosage: 1 Tbsp. 1/day, Oral) on NS. Soon after starting Metamucil treatment, the subject experienced various side effects, including:
  • Gastrointestinal Obstruction
  • Dehydration
Concurrently used drugs: NA.The patient was hospitalized. This finding indicates that some female patients could be more vulnerable to Metamucil.

Intestinal Obstruction, Pyrexia
A 71-year-old female patient from US (weight: NA) experienced symptoms, such as: bowel movement irregularity and was treated with Metamucil(dosage: 4-5 Capsul). The treatment was initiated on Oct 19, 2012. After that a consumer reported the following side effect(s):
  • Intestinal Obstruction
  • Pyrexia
Concurrently used drugs, which potentially could have contributed to side effect(s) or affected Metamucil efficacy:
  • Lisinopril (lisinopril)
  • Norvasc (amlodipine Besilate )
The patient was hospitalized.

Gastroenteritis Escherichia Coli, Pyrexia, Product Contamination Physical
In this report, Metamucil was administered for the following condition: NA.A 74-year-old male consumer from US (weight: NA) started Metamucil treatment (dosage: Unk Dose, Bedtime, Oral) on 2010.Sometime after starting the treatment, the patient complained of the following side effect(s):
  • Gastroenteritis Escherichia Coli
  • Pyrexia
  • Product Contamination Physical
A possible interaction with other drugs could have contributed to this reaction: NA.The patient was hospitalized.Establishing a causal relationship between a specific drug and consumer's side effects is complex, but it is possible that in this report Metamucil treatment could be related to the listed above side effect(s).

Anger, Weight Decreased, Crohn's Disease, Abnormal Behaviour, Off Label Use, Benign Gastrointestinal Neoplasm, Anxiety, Agitation, Frustration
This is a report of the following Metamucil-2 side effect(s):
  • Anger
  • Weight Decreased
  • Crohn's Disease
  • Abnormal Behaviour
  • Off Label Use
  • Benign Gastrointestinal Neoplasm
  • Anxiety
  • Agitation
  • Frustration
A male patient from UNITED STATES (weight: NA) presented with the following condition: constipation and received a treatment with Metamucil-2 (dosage: NA) starting: NS.The following concurrently used drugs could have generated interactions:
  • Zyprexa (2.5 Mg, Qd)
  • Zyprexa (2.5 Mg, Qd)
  • Colace
  • Zyprexa (5 Mg, Qd)
This report suggests that a Metamucil-2 treatment could be associated with the listed above side effect(s).

Carotid Artery Thrombosis, Neurogenic Bladder, Depression, Cerebrovascular Accident, Neuralgia, Carotid Artery Stenosis, Pneumonia Aspiration, Sepsis, Micturition Urgency
This Metamucil /00029101/ report was submitted by a 71-year-old male consumer from UNITED STATES (weight: NA). The patient was diagnosed with: NA and Metamucil /00029101/ was administered (dosage: NA) starting: Aug 17, 2009. The consumer developed a set of symptoms:
  • Carotid Artery Thrombosis
  • Neurogenic Bladder
  • Depression
  • Cerebrovascular Accident
  • Neuralgia
  • Carotid Artery Stenosis
  • Pneumonia Aspiration
  • Sepsis
  • Micturition Urgency
Other drugs used simultaneously:
  • Diltiazem (60 Mg, Tid)
  • Metoprolol Tartrate (50 Mg, Qd)
  • Crestor (10 Mg, Qd)
  • Vitamin D
  • Neurontin (300 Mg, Bid)
  • Multivitamin /00097801/
  • Coumadin
  • Vitamin C /00008001/
The patient was hospitalized.Those unexpected symptoms could be linked to a Metamucil /00029101/ treatment, however establishing a potential drug-safety problem requires a more detailed clinical analysis.

Insomnia, Asthenia, Depressive Symptom, Nail Avulsion, Abdominal Discomfort, Anger, Anxiety, Personality Change
This is a report of a possible correlation between Metamucil-2 use and the following symptoms/side effect(s):
  • Insomnia
  • Asthenia
  • Depressive Symptom
  • Nail Avulsion
  • Abdominal Discomfort
  • Anger
  • Anxiety
  • Personality Change
which could contribute to an assessment of Metamucil-2 risk profile.A female consumer from UNITED STATES (weight: NA) was suffering from NA and was treated with Metamucil-2 (dosage: NA) starting Feb 01, 2012.Other concurrent medications:
  • Prednisone Tab
  • Prednisone Tab
  • Propranolol
  • Prednisone Tab
  • Extra Strength Tylenol
  • Pepto Bismol Max Strength
  • Amlodipine Besylate
  • Klor-con


Toe Amputation, Gastric Banding, Cystitis, Cough, Abdominal Discomfort, Weight Decreased, Cervix Carcinoma Stage Iv, Gastrointestinal Disorder, Nasopharyngitis
A 64-year-old female patient from UNITED STATES (weight: NA) presented with the following symptoms: NA and after a treatment with Metamucil-2 (dosage: NA) experienced the following side effect(s):
  • Toe Amputation
  • Gastric Banding
  • Cystitis
  • Cough
  • Abdominal Discomfort
  • Weight Decreased
  • Cervix Carcinoma Stage Iv
  • Gastrointestinal Disorder
  • Nasopharyngitis
The treatment was started on NS. Metamucil-2 was used in combination with the following drugs:
  • Lantus (Unk)
  • Hyzaar
  • Byetta
  • Glyburide
  • Metformin Hcl
This report could alert potential Metamucil-2 consumers.

Faeces Discoloured
In this report, a 85-year-old male patient from UNITED STATES (weight: NA) was affected by a possible Metamucil-2 side effect.The patient was diagnosed with constipation. After a treatment with Metamucil-2 (dosage: NA, start date: Apr 19, 2012), the patient experienced the following side effect(s):
  • Faeces Discoloured
The following simultaneously used drugs could have led to this reaction:
  • Dulcolax (300 Mg)
  • Tramadol Hcl
The findings here stress that side effects should be taken into consideration when evaluating a Metamucil-2 treatment.

Neck Pain, Blood Uric Acid Increased, Cerebrovascular Accident, Sinusitis, Abdominal Discomfort, Blood Pressure Increased, Blood Triglycerides Increased, Paraesthesia
This is a report of a male patient from BRAZIL (weight: NA), who used Metamucil-2 (dosage: 1 Sachet Every Three Days) for a treatment of diverticulum,hypertension. After starting a treatment on NS, the patient experienced the following side effect(s):
  • Neck Pain
  • Blood Uric Acid Increased
  • Cerebrovascular Accident
  • Sinusitis
  • Abdominal Discomfort
  • Blood Pressure Increased
  • Blood Triglycerides Increased
  • Paraesthesia
The following drugs could possibly have interacted with the Metamucil-2 treatment
  • Diovan Hct (1 Df (320mg Vals/12.5mg Hydrochlorothiazide), Daily)
Taken together, these observations suggest that a Metamucil-2 treatment could be related to side effect(s), such as Neck Pain, Blood Uric Acid Increased, Cerebrovascular Accident, Sinusitis, Abdominal Discomfort, Blood Pressure Increased, Blood Triglycerides Increased, Paraesthesia.

Throat Irritation, Oral Discomfort
This throat irritation side effect was reported by a consumer or non-health professional from UNITED STATES. A 95-year-old female patient (weight:NA) experienced the following symptoms/conditions: NA. The patient was prescribed Metamucil-2 (dosage: NA), which was started on Mar 27, 2012. Concurrently used drugs:
  • Reclast
When starting to take Metamucil-2 the consumer reported the following symptoms:
  • Throat Irritation
  • Oral Discomfort
These side effects may potentially be related to Metamucil-2.

Constipation
This is a Metamucil (plantago Ovata) side effect report of a 43-year-old female patient (weight:NA) from UNITED STATES, suffering from the following symptoms/conditions: NA, who was treated with Metamucil (plantago Ovata) (dosage:NA, start time: NS), combined with:
  • Victoza (, Subcutaneous)
, and developed a serious reaction and a constipation side effect. The patient presented with:
  • Constipation
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Metamucil (plantago Ovata) treatment in female patients suffering from NA, resulting in constipation.

Multiple Myeloma, Neoplasm Progression, Respiratory Tract Infection
This report suggests a potential Metamucil-2 multiple myeloma side effect(s) that can have serious consequences. A 71-year-old male patient from CANADA (weight:NA) was diagnosed with the following health condition(s): NA and used Metamucil-2 (dosage: NA) starting Aug 20, 2010. Soon after starting Metamucil-2 the patient began experiencing various side effects, including:
  • Multiple Myeloma
  • Neoplasm Progression
  • Respiratory Tract Infection
Drugs used concurrently:
  • Prochlorperazine
  • Oxycontin
  • Oxygen
  • Lansoyl
  • Oxycodone Hcl
  • Cap Vorinostat (300 Mg/daily Po)
  • Loperamide Hcl
  • Ovol
The patient was hospitalized. Although Metamucil-2 demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as multiple myeloma, may still occur.

Pruritus, Urticaria, Erythema
This pruritus problem was reported by a consumer or non-health professional from UNITED STATES. A 60-year-old male patient (weight: NA) was diagnosed with the following medical condition(s): medical diet.On Feb 01, 2012 a consumer started treatment with Metamucil-2 (dosage: 1 Tsp Daily Oral). The following drugs/medications were being taken at the same time: NA. When commencing Metamucil-2, the patient experienced the following unwanted symptoms /side effects:
  • Pruritus
  • Urticaria
  • Erythema
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as pruritus, may become evident only after a product is in use by the general population.

Dizziness, Nausea
This is a Metamucil-2 side effect report of a 65-year-old female patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Metamucil-2 (dosage: 1 Tsp Daily Oral) starting Feb 01, 2012. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Dizziness
  • Nausea
This opens a possibility that Metamucil-2 could cause dizziness and that some female patients may be more susceptible.

Weight Decreased, Pain, Malaise
A 58-year-old male patient (weight: NA) from UNITED STATES with the following symptoms: crohn's disease started Metamucil-2 treatment (dosage: At Bedtime) on Apr 05, 2011. Soon after starting Metamucil-2 treatment, the consumer experienced several side effects, including:
  • Weight Decreased
  • Pain
  • Malaise
. Concurrently used drugs:
  • Entocort Ec (Align In The Morning, At Bedtime For Crohn's)
  • Humira
This finding indicates that some patients can be more vulnerable to developing Metamucil-2 side effects, such as weight decreased.

Arrhythmia, Fatigue, Oedema Peripheral, Cardiac Failure Congestive, Dyspnoea, Orthopnoea, Decreased Appetite
This arrhythmia side effect was reported by a physician from UNITED STATES. A male patient (weight:NA) experienced the following symptoms/conditions: NA.The patient was prescribed Metamucil-2 (dosage: NA), which was started on Oct 06, 2011. Concurrently used drugs:
  • Cilostazol
  • Exjade (1500 Mg, Daily)
  • Carvedilol
  • Lasix
  • Vitamin D
  • Aspirin
  • Lantus
  • Lipitor
.When starting to take Metamucil-2 the consumer reported symptoms, such as:
  • Arrhythmia
  • Fatigue
  • Oedema Peripheral
  • Cardiac Failure Congestive
  • Dyspnoea
  • Orthopnoea
  • Decreased Appetite
These side effects may potentially be related to Metamucil-2. The patient was hospitalized.

Gastroenteritis Viral, Pancytopenia, Prostatic Specific Antigen Increased, Diverticulum, Petechiae, Prostatomegaly, Mental Disorder, Vision Blurred
This is a report of a 55-year-old male patient (weight: NA) from UNITED STATES, suffering from the following symptoms/conditions: NA, who was treated with Metamucil /00029101/ (dosage: NA, start time: Apr 22, 2010), combined with:
  • Prilosec (20 Mg, Unk)
  • Flomax
  • Folic Acid
  • Mirtazapine (Unk)
  • Vitamin C /00008001/ (Unk Unk, Qd)
  • Platelets
  • Nplate (Unk Unk, Unk)
  • Vitamin B 12 Lichtenstein
and developed a serious reaction and side effect(s). The consumer presented with:
  • Gastroenteritis Viral
  • Pancytopenia
  • Prostatic Specific Antigen Increased
  • Diverticulum
  • Petechiae
  • Prostatomegaly
  • Mental Disorder
  • Vision Blurred
which developed after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Metamucil /00029101/ treatment in male patients, resulting in gastroenteritis viral side effect.

Oedema Peripheral, Joint Swelling, Rhinorrhoea, Cough
This report suggests a potential Metamucil-2 Oedema Peripheral, Joint Swelling, Rhinorrhoea, Cough side effect(s) that can have serious consequences. A 64-year-old female patient (weight: NA) from UNITED STATES was diagnosed with the following symptoms/conditions: NA and used Metamucil-2 (dosage: NA) starting Jun 27, 2011. Soon after starting Metamucil-2 the patient began experiencing various side effects, including:
  • Oedema Peripheral
  • Joint Swelling
  • Rhinorrhoea
  • Cough
Drugs used concurrently:
  • Calcium (Unk, Qd)
  • Atenolol (25 Mg, Qd)
  • Fish Oil (Unk, Bid)
  • Forteo (20 Ug, Qd)
  • Glucosamine (Unk, Bid)
  • Aspirin (Unk, Qd)
  • Multi-vitamin (Unk)
  • Vitamin D (50000 U, Weekly (1/w))
Although Metamucil-2 demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as oedema peripheral, may still occur.

Musculoskeletal Pain, Musculoskeletal Chest Pain, Presyncope, Feeling Abnormal, Back Pain, Unresponsive To Stimuli, Lethargy
This Musculoskeletal Pain, Musculoskeletal Chest Pain, Presyncope, Feeling Abnormal, Back Pain, Unresponsive To Stimuli, Lethargy problem was reported by a consumer or non-health professional from UNITED STATES. A 69-year-old male patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On Oct 06, 2011 this consumer started treatment with Metamucil-2 (dosage: NA). The following drugs were being taken at the same time:
  • Dovonex
  • Multi-vitamins
  • Immune Globulin (human) (X1; Iv)
  • Ibuprofen
  • Glucosamine/chondroitin)
  • Amlodipine
  • Omeprazole
When commencing Metamucil-2, the patient experienced the following unwanted symptoms/side effects:
  • Musculoskeletal Pain
  • Musculoskeletal Chest Pain
  • Presyncope
  • Feeling Abnormal
  • Back Pain
  • Unresponsive To Stimuli
  • Lethargy
Although all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as musculoskeletal pain, may become evident only after a product is in use by the general population.

Cholelithiasis, Vomiting, Pain, Neurilemmoma, Diarrhoea, Dyspnoea, Muscle Spasms, Nausea, Abdominal Mass
This is a report of a 38-year-old female patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Metamucil-2 (dosage: Unk Unk, Prn) starting Jan 01, 2001. Concurrently used drugs:
  • Naproxen (aleve) (Unk Unk, Prn)
  • Yaz (Unk)
  • Ciprofloxacin Hcl (250 Mg, Unk)
  • Ibuprofen (advil) (Unk Unk, Prn)
  • Ascorbic Acid (Unk)
  • Yaz
Soon after that, the consumer experienced the following side effects:
  • Cholelithiasis
  • Vomiting
  • Pain
  • Neurilemmoma
  • Diarrhoea
  • Dyspnoea
  • Muscle Spasms
  • Nausea
  • Abdominal Mass
The patient was hospitalized. This opens a possibility that Metamucil-2 treatment could cause the above reactions, including cholelithiasis, and some female subjects may be more susceptible.

Choking Sensation, Anaphylactic Reaction, Pharyngeal Oedema, Wheezing, Incorrect Dose Administered, Dysphagia, Respiratory Distress, Discomfort
A 59-year-old female patient (weight: NA) from UNITED STATES with the following symptoms/conditions: NA started Metamucil-2 treatment (dosage: 1tbsp, 1 Only, Oral) on Jun 12, 2011. Soon after starting Metamucil-2 treatment, the subject experienced various side effects, including:
  • Choking Sensation
  • Anaphylactic Reaction
  • Pharyngeal Oedema
  • Wheezing
  • Incorrect Dose Administered
  • Dysphagia
  • Respiratory Distress
  • Discomfort
Concurrently used drugs:
  • Premarin
  • Vitamin E /00110501/ (tocopherol)
  • B Complex /0175340 (vitamin-b-komplex Standard)
This finding indicates that some female patients could be more vulnerable to Metamucil-2.

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Keep Track of Side Effects

Note Your Observations

It is really important to keep of your 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

    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.


    Discuss Metamucil Side Effects

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    Metamucil Safety Alerts, Active Ingredients, Usage Information

    NDC37000-013
    TypeHUMAN OTC DRUG
    Proprietary NameMetamucil Therapy for Regularity
    NamePsyllium Husk
    Dosage FormPOWDER
    RouteORAL
    On market since19890331
    LabelerThe Procter & Gamble Manufacturing Company
    Active Ingredient(s)PSYLLIUM HUSK
    Strength(s)3.4
    Unit(s)g/11g
    Pharma Class

    More About Metamucil

    Side Effects reported to FDA: 104

    Metamucil safety alerts: No

    Reported deaths: 7

    Reported hospitalizations: 41

    Latest Metamucil clinical trials