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After taking my first dose of Miralax, I experienced severe dizxiness. ...Keep Reading

I started taking Miralax and became dehydrated, had water retention, sweats, ...Keep Reading

I have been on Miralax, one capful a day for 3 months now....Keep Reading

REGARDING MIRALAX..........IT HAS PROPANE ...Keep Reading

If your having trouble having a bm everyday which is what everyone should have ...Keep Reading

Never took the stuff.......Doesn't anybody READ the ...Keep Reading

I started Miralax and unsure when is the best time to take it. ...Keep Reading

Has anyone experienced hair loss as a side effect of long term use of ...Keep Reading

I have been taking Amitiza for about 3 weeks. I have chronic constipation ...Keep Reading

miralax is giving me cramps all the time. it is worse after I ...Keep Reading

i had a terrible experience with Miralax...........Keep Reading

Russell34 please contact me. I believe horrible things have resulted from the use of ...Keep Reading

Has anyone had a a bm where it felt like someone was pouring acid ...Keep Reading

I took Miralax for 2 weeks without any side effects. It softened my ...Keep Reading

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side effects patient, 86 years of age, was diagnosed with constipation and took Miralax Po . View more Serious Adverse Events reported to FDA.

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Dizziness (38)
Potassium (27)
Am Experiencing Hair Loss (22)
Back Pain (20)
Smelly Gas (14)
Blood Sugar (12)
HEADACHE (11)
>>View All User Submitted Miralax Side Effects

List of Miralax Adverse Effects reported to US Food and Drug Administration (FDA)

  Showing 176-200 of 424 

Rectal Haemorrhage (6782494-X)
on Jun 03, 2010 Female patient from UNITED STATES , 86 years of age, was diagnosed with
  • constipation
and was treated with Miralax. Patient experienced the following unwanted or unexpected effects: rectal haemorrhage. Miralax dosage: Po.
Patient also using the following medications:
  • Warfarin Sodium
  • Pantoprazole Sodium
  • Lexapro
  • Synthroid


Faeces Discoloured (6782471-9)
Patient was taking Miralax. Patient had the following side effects: faeces discoloured on Jun 10, 2010 from UNITED STATES Additional patient health information: Female patient , 74 years of age, . Miralax dosage: 17 Gm;qd;po.
Patient also using the following medications:
  • Amitiza
  • Ativan
  • Norvasc
  • Micardis


Blood Pressure Systolic Increased, Dizziness, Hyponatraemia (6761807-9)
Adverse event was reported on May 26, 2010 by a Female patient taking Miralax (Dosage: Po) was diagnosed with
  • colonoscopy
  • hypertension
and. Location: UNITED STATES , 55 years of age, After Miralax was administered, patient had the following side effects: blood pressure systolic increased, dizziness, hyponatraemia.
Patient also using the following medications:
  • Coreg Cr (40 Mg;qd;po)
  • Dulcolax
  • Celexa
  • Irbesartan
  • Aspirin
  • Magnesium Citrate
Patient was hospitalized.

Convulsion (6761805-5)
on May 28, 2010 Male patient from UNITED STATES , child 10 years of age, was treated with Miralax. Patient experienced the following unwanted or unexpected effects: convulsion. Miralax dosage: Po.


Dehydration, Vomiting Projectile (6761803-1)
on Jun 01, 2010 Female patient from UNITED STATES , 59 years of age, was treated with Miralax. Patient had the following side effects: dehydration, vomiting projectile. Miralax dosage: Once;po.
Patient also using the following medications:
  • Plavix
  • Milk Of Magnesia Tab (Po)
Patient was hospitalized.

Contusion, Convulsion (6736360-6)
Patient was taking Miralax. After Miralax was administered, patient had the following side effects: contusion, convulsion on May 20, 2010 from UNITED STATES Additional patient health information: Male patient , weighting 21.00 lb, was diagnosed with
  • constipation
and. Miralax dosage: N/A.

Grand Mal Convulsion, Respiratory Arrest, Therapeutic Agent Toxicity (6720634-9)
Adverse event was reported on May 04, 2010 by a Female patient taking Miralax (Dosage: Po) . Location: UNITED STATES , child 5 years of age, Patient experienced the following unwanted or unexpected effects: grand mal convulsion, respiratory arrest, therapeutic agent toxicity.

Rectal Haemorrhage (6693077-4)
on Apr 12, 2010 Female patient from UNITED STATES , 86 years of age, was diagnosed with
  • constipation
and was treated with Miralax. Patient had the following side effects: rectal haemorrhage. Miralax dosage: Po.
Patient also using the following medications:
  • Pantoprazole Sodium
  • Lexapro
  • Warfarin Sodium
  • Synthroid


Abnormal Behaviour, Anaphylactic Reaction, Bronchospasm, Convulsion, Dental Caries, Disturbance In Attention, Dry Skin, Emotional Disorder (6681659-5)
on Apr 13, 2010 Male patient from UNITED STATES , child 4 years of age, weighting 34.00 lb, was diagnosed with
  • constipation
  • rectal prolapse
and was treated with Miralax. After Miralax was administered, patient had the following side effects: abnormal behaviour, anaphylactic reaction, bronchospasm, convulsion, dental caries, disturbance in attention, dry skin, emotional disorder. Miralax dosage: 17 G 1 Time Day Po; 17g 2 Time Day Po.

Abdominal Distension, Faeces Discoloured, Muscle Spasms, Unevaluable Event (6665590-7)
Patient was taking Miralax. Patient experienced the following unwanted or unexpected effects: abdominal distension, faeces discoloured, muscle spasms, unevaluable event on Mar 10, 2010 from UNITED STATES Additional patient health information: Female patient , 90 years of age, . Miralax dosage: Qd; Po.

Asthenia, Barrett's Oesophagus, Cholelithiasis, Dyschezia, Hepatic Function Abnormal, Influenza Like Illness, Lung Neoplasm, Myocardial Infarction (6618955-3)
Adverse event was reported on Feb 18, 2010 by a Female patient taking Miralax (Dosage: Qd; Po) was diagnosed with
  • constipation
and. Location: UNITED STATES , 56 years of age, Patient had the following side effects: asthenia, barrett's oesophagus, cholelithiasis, dyschezia, hepatic function abnormal, influenza like illness, lung neoplasm, myocardial infarction.
Patient also using the following medications:
  • Oxycontin
  • Lisinopril


Abnormal Dreams, Asthenia, Autoimmune Thyroiditis, Dreamy State, Emotional Disorder, Feeling Abnormal, Hashimoto's Encephalopathy, Heart Rate Decreased, Hemiparesis (6613143-9)
on Feb 10, 2010 Female patient from UNITED STATES , 57 years of age, weighting 195.0 lb, was diagnosed with
  • constipation
and was treated with Miralax. After Miralax was administered, patient had the following side effects: abnormal dreams, asthenia, autoimmune thyroiditis, dreamy state, emotional disorder, feeling abnormal, hashimoto's encephalopathy, heart rate decreased, hemiparesis. Miralax dosage: 17 Gm; Qd; Po.

Abdominal Pain, Anaemia, Anxiety, Asthenia, Bone Scan Abnormal, Confusional State, Constipation, Escherichia Urinary Tract Infection, Gait Disturbance (6589649-8)
on Feb 01, 2010 Female patient from UNITED STATES , 76 years of age, was treated with Miralax. Patient experienced the following unwanted or unexpected effects: abdominal pain, anaemia, anxiety, asthenia, bone scan abnormal, confusional state, constipation, escherichia urinary tract infection, gait disturbance. Miralax dosage: Po.
Patient also using the following medications:
  • Dasatinib (70 Mg; Qd; Po, 100 Mg; Qd; Po)
  • Dasatinib (70 Mg; Qd; Po, 100 Mg; Qd; Po)
  • Oxycodone
  • Alprazolam
  • Effexor
  • Synthroid
  • Ambien
  • Protonix
Patient was hospitalized.

Diarrhoea, Faeces Discoloured (6553039-4)
Patient was taking Miralax. Patient had the following side effects: diarrhoea, faeces discoloured on Jan 15, 2010 from UNITED STATES Additional patient health information: Female patient , 89 years of age, . Miralax dosage: 8.5 Gm; Po; 17 Gm; Po.

Back Pain, Faeces Discoloured, Muscle Spasms (6536842-6)
Adverse event was reported on Jan 05, 2010 by a Female patient taking Miralax (Dosage: 17 Gm; Once; Po) was diagnosed with
  • constipation
and. Location: UNITED STATES , 80 years of age, After Miralax was administered, patient had the following side effects: back pain, faeces discoloured, muscle spasms.

Abdominal Pain Upper, Back Pain, Cerebrovascular Accident, Dizziness, Muscle Spasms, Muscular Weakness, Nausea, Vomiting (6521145-6)
on Dec 14, 2009 Female patient from UNITED STATES , 77 years of age, was diagnosed with
  • constipation
and was treated with Miralax. Patient experienced the following unwanted or unexpected effects: abdominal pain upper, back pain, cerebrovascular accident, dizziness, muscle spasms, muscular weakness, nausea, vomiting. Miralax dosage: Tid;po.
Patient also using the following medications:
  • Opiates
  • Tylenol (caplet)


Dysgeusia, Nausea, Overgrowth Bacterial (6496697-5)
on Dec 07, 2009 Female patient from UNITED STATES , 62 years of age, was diagnosed with
  • sjogren's syndrome
and was treated with Miralax. Patient had the following side effects: dysgeusia, nausea, overgrowth bacterial. Miralax dosage: Po.

Cough, Dysphonia, Ocular Hyperaemia, Pharyngeal Oedema, Rash, Sneezing, Swollen Tongue, Urticaria (6493282-6)
Patient was taking Miralax. After Miralax was administered, patient had the following side effects: cough, dysphonia, ocular hyperaemia, pharyngeal oedema, rash, sneezing, swollen tongue, urticaria on Dec 03, 2009 from UNITED STATES Additional patient health information: Female patient , 38 years of age, was diagnosed with
  • colonoscopy
and. Miralax dosage: Po.
Patient also using the following medications:
  • Zoloft
  • Advil
  • Excedrin (migraine)
  • Migraine
  • Indocine


Blood Glucose Increased, Dyspnoea, Flatulence, Loss Of Consciousness (6491783-8)
Adverse event was reported on Dec 02, 2009 by a Female patient taking Miralax (Dosage: 17 Gm;bid;po) was diagnosed with
  • constipation
and. Location: UNITED STATES , 74 years of age, weighting 115.0 lb, Patient experienced the following unwanted or unexpected effects: blood glucose increased, dyspnoea, flatulence, loss of consciousness. Patient was hospitalized.

Diarrhoea, Infrequent Bowel Movements (6468219-6)
on Nov 18, 2009 Male patient from UNITED STATES , 95 years of age, was treated with Miralax. Patient had the following side effects: diarrhoea, infrequent bowel movements. Miralax dosage: 8.5 Gm; Qd; Po, 17 Gm; Qd; Po. Patient was hospitalized.

Bacterial Infection, Dysgeusia, Nausea, Tongue Disorder (6442846-4)
on Nov 06, 2009 Female patient from UNITED STATES , 62 years of age, was diagnosed with
  • sjogren's syndrome
and was treated with Miralax. After Miralax was administered, patient had the following side effects: bacterial infection, dysgeusia, nausea, tongue disorder. Miralax dosage: Po.

Heart Rate Decreased, Presyncope (6442392-8)
Patient was taking Miralax. Patient experienced the following unwanted or unexpected effects: heart rate decreased, presyncope on Nov 03, 2009 from UNITED STATES Additional patient health information: Male patient , 88 years of age, . Miralax dosage: 17 Gm;po.
Patient also using the following medications:
  • Blood Pressure Con.


Anuria (6429345-0)
Adverse event was reported on Oct 26, 2009 by a Female patient taking Miralax (Dosage: Tid; Po) . Location: UNITED STATES , child 1. years of age, Patient had the following side effects: anuria.

Faecaloma (6425843-4)
on Oct 23, 2009 Female patient from UNITED STATES , 80 years of age, was treated with Miralax. After Miralax was administered, patient had the following side effects: faecaloma. Miralax dosage: 34 Gm; Qd; Po, 34 Gm; Bid; Po. Patient was hospitalized.

Flatulence, Inflammation, Oedema Peripheral, Pyrexia (6412008-5)
on Oct 14, 2009 Female patient from UNITED STATES , 79 years of age, weighting 150.0 lb, was diagnosed with
  • constipation
and was treated with Miralax. Patient experienced the following unwanted or unexpected effects: flatulence, inflammation, oedema peripheral, pyrexia. Miralax dosage: Po. Patient was hospitalized.

  Showing 176-200 of 424 

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Miralax Information

Alternative MIRALAX Names:POLYETHYL

Substance:POLYETHYL

More About Miralax

Side Effects reported to FDA: 424. View FDA Adverse Reports

Miralax safety alerts: No

Reported deaths: 17

Reported hospitalizations: 97

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Miralax Adverse Reactions

Faeces Discoloured ( 36 Reports)

Diarrhoea ( 33 Reports)

Constipation ( 29 Reports)

Abdominal Distension ( 27 Reports)

Nausea ( 25 Reports)

Dehydration ( 22 Reports)

Dyspnoea ( 21 Reports)

Muscle Spasms ( 21 Reports)

Rectal Haemorrhage ( 20 Reports)

Asthenia ( 19 Reports)

Abdominal Pain ( 18 Reports)

Flatulence ( 18 Reports)

Haematochezia ( 18 Reports)

Malaise ( 18 Reports)

Urticaria ( 18 Reports)

Convulsion ( 17 Reports)

Pruritus ( 17 Reports)

Dizziness ( 16 Reports)

Pain ( 16 Reports)

Rash ( 14 Reports)

Vomiting ( 14 Reports)

Abnormal Behaviour ( 12 Reports)

Blood Pressure Increased ( 12 Reports)

Condition Aggravated ( 12 Reports)

Headache ( 12 Reports)

Abdominal Pain Upper ( 11 Reports)

Hypersensitivity ( 11 Reports)

Pharyngeal Oedema ( 11 Reports)

Swollen Tongue ( 11 Reports)

Back Pain ( 10 Reports)

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