PatientsVille.com Logo

Euthyrox Side Effects

PatientsVille

Common Euthyrox Side Effects


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

Headache (12)
Blood Thyroid Stimulating Hormone Increased (8)
Tachycardia (7)
Maternal Exposure During Pregnancy (7)
Weight Decreased (6)
Depression (6)
Blood Thyroid Stimulating Hormone Decreased (5)
Agitation (5)
Dizziness (5)
Dyspnoea (5)
Constipation (4)
Insomnia (4)
Abortion Induced (4)
Angina Pectoris (4)
Malaise (4)
Myocardial Infarction (4)
Vomiting (4)
Urticaria (4)
Nausea (4)
Muscle Spasms (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.

Euthyrox Side Effects Reported to FDA



Euthyrox Side Effect Report#9995693
Mental Impairment, Mental Impairment, Myalgia, Arthralgia, Abdominal Pain Upper, Weight Increased, Crying, Night Sweats, Amnesia
This is a report of a 59-year-old female patient (weight: NA) from DK, suffering from the following health symptoms/conditions: myxoedema, who was treated with Euthyrox (dosage: NA, start time:
Nov 15, 2010), combined with: NA. and developed a serious reaction and side effect(s): Mental Impairment, Mental Impairment, Myalgia, Arthralgia, Abdominal Pain Upper, Weight Increased, Crying, Night Sweats, Amnesia after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Euthyrox treatment in female patients, resulting in Mental Impairment side effect.
Euthyrox Side Effect Report#9970186
Blood Thyroid Stimulating Hormone Increased, Incorrect Dose Administered
This report suggests a potential Euthyrox Blood Thyroid Stimulating Hormone Increased side effect(s) that can have serious consequences. A 87-year-old male patient (weight: NA) from ES was diagnosed with the following symptoms/conditions: NA and used Euthyrox (dosage: 75 Mcg 2 In 1 D) starting 201301. After starting Euthyrox the patient began experiencing various side effects, including: Blood Thyroid Stimulating Hormone Increased, Incorrect Dose AdministeredAdditional drugs used concurrently: NA. Although Euthyrox demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Blood Thyroid Stimulating Hormone Increased, may still occur.
Euthyrox Side Effect Report#9915870
Atrial Fibrillation
This Atrial Fibrillation problem was reported by a health professional from DE. A 58-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: post procedural hypothyroidism. On
Feb 01, 2014 this consumer started treatment with Euthyrox (dosage: NA). The following drugs were being taken at the same time: NA. When using Euthyrox, the patient experienced the following unwanted symptoms/side effects: Atrial FibrillationThe 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 Atrial Fibrillation, may become evident only after a product is in use by the general population.
Euthyrox Side Effect Report#9856676
Blood Thyroid Stimulating Hormone Increased, Product Counterfeit, Maternal Exposure During Pregnancy
This Blood Thyroid Stimulating Hormone Increased side effect was reported by a consumer or non-health professional from RU. A 58-year-old female patient (weight:NA) experienced the following symptoms/conditions: hypothyroidism.The patient was prescribed Euthyrox 125 (levothyroxine Sodium) (tablet) (levothyroxine Sodium),151276 (drug dosage: 1/2 Tablet), which was initiated on 201312. Concurrently used drugs: NA..After starting to take Euthyrox 125 (levothyroxine Sodium) (tablet) (levothyroxine Sodium),151276 the consumer reported adverse symptoms, such as: Blood Thyroid Stimulating Hormone Increased, Product Counterfeit, Maternal Exposure During PregnancyThese side effects may potentially be related to Euthyrox 125 (levothyroxine Sodium) (tablet) (levothyroxine Sodium),151276.
Euthyrox Side Effect Report#9844874
Laryngeal Dyspnoea
This is a report of a 58-year-old female patient (weight: NA) from DE, suffering from the following health symptoms/conditions: hypothyroidism, who was treated with Euthyrox (dosage: NA, start time:
Dec 18, 2013), combined with:
  • L-thyroxine
and developed a serious reaction and side effect(s): Laryngeal Dyspnoea after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Euthyrox treatment in female patients, resulting in Laryngeal Dyspnoea side effect.
Euthyrox Side Effect Report#9844547
Convulsion, Muscle Spasms, Eye Swelling, Tri-iodothyronine Increased, Thyroxine Increased
This report suggests a potential Euthyrox Convulsion side effect(s) that can have serious consequences. A 36-year-old female patient (weight: NA) from CN was diagnosed with the following symptoms/conditions: thyroidectomy and used Euthyrox (dosage: NA) starting 201310. After starting Euthyrox the patient began experiencing various side effects, including: Convulsion, Muscle Spasms, Eye Swelling, Tri-iodothyronine Increased, Thyroxine IncreasedAdditional drugs used concurrently:
  • Calcium (calcium) (tablets) (calcium)
Although Euthyrox demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Convulsion, may still occur.
Euthyrox Side Effect Report#9782730
Anxiety, Suicidal Ideation, Depression, Cardiac Arrest, Chest Pain, Dyspnoea, Disability, Memory Impairment
This Anxiety problem was reported by a consumer or non-health professional from DK. A 28-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: hypothyroidism. On
Oct 28, 2010 this consumer started treatment with Euthyrox (dosage: NA). The following drugs were being taken at the same time: NA. When using Euthyrox, the patient experienced the following unwanted symptoms/side effects: Anxiety, Suicidal Ideation, Depression, Cardiac Arrest, Chest Pain, Dyspnoea, Disability, Memory ImpairmentThe 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 Anxiety, may become evident only after a product is in use by the general population.
Euthyrox Side Effect Report#9773029
Ocular Hyperaemia, Eye Haemorrhage, Tongue Paralysis, Chest Discomfort, Oedema Mouth, Headache
This Ocular Hyperaemia side effect was reported by a consumer or non-health professional from DE. A 78-year-old female patient (weight:NA) experienced the following symptoms/conditions: thyroidectomy.The patient was prescribed Euthyrox (drug dosage: (75 Mcg)), which was initiated on NS. Concurrently used drugs:
  • Novothyral ((1, 3/4, 1/2))
.After starting to take Euthyrox the consumer reported adverse symptoms, such as: Ocular Hyperaemia, Eye Haemorrhage, Tongue Paralysis, Chest Discomfort, Oedema Mouth, HeadacheThese side effects may potentially be related to Euthyrox. The patient was hospitalized.
Euthyrox Side Effect Report#9752218
Thyroid Cancer, Dizziness, Eye Swelling, Headache, Arrhythmia, Headache, Insomnia
This is a report of a 74-year-old female patient (weight: NA) from CN, suffering from the following health symptoms/conditions: thyroid cancer, who was treated with Euthyrox (dosage: 50 Mcg (50 Mcg, 1 In 1 D), Oral, start time: 200705), combined with: NA. and developed a serious reaction and side effect(s): Thyroid Cancer, Dizziness, Eye Swelling, Headache, Arrhythmia, Headache, Insomnia after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Euthyrox treatment in female patients, resulting in Thyroid Cancer side effect.
Euthyrox Side Effect Report#9731412
Subdural Haematoma, Constipation, Blood Pressure Diastolic Decreased, International Normalised Ratio Increased, Abdominal Discomfort, Haematocrit Decreased, Haemoglobin Decreased, Platelet Count Decreased, White Blood Cell Count Decreased
This report suggests a potential Euthyrox 175 Mcg Subdural Haematoma side effect(s) that can have serious consequences. A 61-year-old female patient (weight: NA) from ES was diagnosed with the following symptoms/conditions: hypothyroidism,atrial fibrillation and used Euthyrox 175 Mcg (dosage: (175 Mcg , 1 In 1 D) Oral (levothyroxine Sodium) (levothyroxine Sodium)) starting 2011. After starting Euthyrox 175 Mcg the patient began experiencing various side effects, including: Subdural Haematoma, Constipation, Blood Pressure Diastolic Decreased, International Normalised Ratio Increased, Abdominal Discomfort, Haematocrit Decreased, Haemoglobin Decreased, Platelet Count Decreased, White Blood Cell Count DecreasedAdditional drugs used concurrently:
  • Aldocumar
  • Furosemide
  • Metamizol Magnesium) (metamizole Magnesium) (metamizole Magnesium)
  • Ameride Amiloride Hydrochloride) (moduretic) (hydrochlorothiazide,amiloride Hydrochloride)
The patient was hospitalized. Although Euthyrox 175 Mcg demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Subdural Haematoma, may still occur.
Euthyrox Side Effect Report#9716765
Convulsion, Urinary Tract Infection
This Convulsion problem was reported by a health professional from CH. A 20-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: hypothyroidism,depression. On 201304 this consumer started treatment with Euthyrox (dosage: NA). The following drugs were being taken at the same time:
  • Bupropion
  • Desvenlafaxine
  • Abilify (aripirazole)
When using Euthyrox, the patient experienced the following unwanted symptoms/side effects: Convulsion, Urinary Tract InfectionThe 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 Convulsion, may become evident only after a product is in use by the general population.
Euthyrox Side Effect Report#9716720
Product Counterfeit, No Therapeutic Response, Maternal Exposure During Pregnancy
This Product Counterfeit side effect was reported by a consumer or non-health professional from RU. A 22-year-old female patient (weight:NA) experienced the following symptoms/conditions: NA.The patient was prescribed Euthyrox (drug dosage: 100 Mcg), which was initiated on NS. Concurrently used drugs: NA..After starting to take Euthyrox the consumer reported adverse symptoms, such as: Product Counterfeit, No Therapeutic Response, Maternal Exposure During PregnancyThese side effects may potentially be related to Euthyrox.
Euthyrox Side Effect Report#9700810
Respiratory Distress, Hypoaesthesia Oral, Palatal Oedema, Uvulitis, Malaise, Hypoaesthesia Oral
This is a report of a 66-year-old female patient (weight: NA) from US, suffering from the following health symptoms/conditions: autoimmune thyroiditis, who was treated with Euthyrox (dosage: NA, start time: 2012), combined with: NA. and developed a serious reaction and side effect(s): Respiratory Distress, Hypoaesthesia Oral, Palatal Oedema, Uvulitis, Malaise, Hypoaesthesia Oral after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Euthyrox treatment in female patients, resulting in Respiratory Distress side effect.
Euthyrox Side Effect Report#9684544
Abdominal Pain, Hypoaesthesia, Palpitations, Insomnia, Night Sweats, Lactose Intolerance, Hypoaesthesia
This report suggests a potential Euthyrox Abdominal Pain side effect(s) that can have serious consequences. A 74-year-old female patient (weight: NA) from DE was diagnosed with the following symptoms/conditions: hypothyroidism and used Euthyrox (dosage: NA) starting 2004. After starting Euthyrox the patient began experiencing various side effects, including: Abdominal Pain, Hypoaesthesia, Palpitations, Insomnia, Night Sweats, Lactose Intolerance, HypoaesthesiaAdditional drugs used concurrently:
  • Simvastatin (simvastatin) (simvastatin)
The patient was hospitalized. Although Euthyrox demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Abdominal Pain, may still occur.
Euthyrox Side Effect Report#9652162
Weight Decreased
This Weight Decreased problem was reported by a consumer or non-health professional from ES. A 47-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: hypothyroidism,weight control. On
Jun 01, 2013 this consumer started treatment with Euthyrox (dosage: 25 Mcg Cada 24 Horas). The following drugs were being taken at the same time:
  • Bio Three
When using Euthyrox, the patient experienced the following unwanted symptoms/side effects: Weight DecreasedAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Weight Decreased, may become evident only after a product is in use by the general population.
Euthyrox Side Effect Report#9652160
Angina Pectoris, Feeling Cold, Gait Disturbance, Vertigo, Hypoglycaemia, Hypotonia, Alopecia, Dry Skin
This Angina Pectoris side effect was reported by a consumer or non-health professional from DE. A 69-year-old female patient (weight:NA) experienced the following symptoms/conditions: autoimmune thyroiditis.The patient was prescribed Euthyrox (drug dosage: NA), which was initiated on NS. Concurrently used drugs: NA..After starting to take Euthyrox the consumer reported adverse symptoms, such as: Angina Pectoris, Feeling Cold, Gait Disturbance, Vertigo, Hypoglycaemia, Hypotonia, Alopecia, Dry SkinThese side effects may potentially be related to Euthyrox.
Euthyrox Side Effect Report#9623206
Liver Injury
This is a report of a 32-year-old female patient (weight: NA) from CN, suffering from the following health symptoms/conditions: thyroidectomy, who was treated with Euthyrox (dosage: NA, start time: 200611), combined with: NA. and developed a serious reaction and side effect(s): Liver Injury after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Euthyrox treatment in female patients, resulting in Liver Injury side effect.
Euthyrox Side Effect Report#9602645
Heart Rate Irregular, Chest Discomfort, Dyspnoea, Fluid Retention, Dizziness, Muscle Contracture, Myalgia, Arthralgia, Headache
This report suggests a potential Euthyrox Heart Rate Irregular side effect(s) that can have serious consequences. A 58-year-old female patient (weight: NA) from SE was diagnosed with the following symptoms/conditions: hypothyroidism and used Euthyrox (dosage: 1 Df (100 Mcg,per Day)) starting
Apr 12, 2013. After starting Euthyrox the patient began experiencing various side effects, including: Heart Rate Irregular, Chest Discomfort, Dyspnoea, Fluid Retention, Dizziness, Muscle Contracture, Myalgia, Arthralgia, HeadacheAdditional drugs used concurrently:
  • Behepan (cyanocobalamin) (cyanocobalamin)
Although Euthyrox demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Heart Rate Irregular, may still occur.
Euthyrox Side Effect Report#9602626
Anti-thyroid Antibody Positive, Hypophagia, Weight Decreased, Arrhythmia, Restlessness, Hyperhidrosis, Vomiting, Initial Insomnia
This Anti-thyroid Antibody Positive problem was reported by a consumer or non-health professional from CN. A 60-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On
Jul 20, 2013 this consumer started treatment with Euthyrox (dosage: 1-1/4 Tablet (50mcg, 1 In 1 D)). The following drugs were being taken at the same time: NA. When using Euthyrox, the patient experienced the following unwanted symptoms/side effects: Anti-thyroid Antibody Positive, Hypophagia, Weight Decreased, Arrhythmia, Restlessness, Hyperhidrosis, Vomiting, Initial InsomniaAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Anti-thyroid Antibody Positive, may become evident only after a product is in use by the general population.
Euthyrox Side Effect Report#9539337
Pemphigus, Skin Atrophy, Pemphigoid, Hypothyroidism
This Pemphigus side effect was reported by a consumer or non-health professional from CH. A 42-year-old female patient (weight:NA) experienced the following symptoms/conditions: hypothyroidism,dyspepsia.The patient was prescribed Euthyrox (drug dosage: 75 Mcg (75 Mcg.), which was initiated on
Oct 17, 2012. Concurrently used drugs:
  • Pantoprazole
.After starting to take Euthyrox the consumer reported adverse symptoms, such as: Pemphigus, Skin Atrophy, Pemphigoid, HypothyroidismThese side effects may potentially be related to Euthyrox.
Euthyrox Side Effect Report#9539331
Muscle Spasms, Alopecia, Restless Legs Syndrome, Musculoskeletal Discomfort, Anxiety, Diarrhoea, Restlessness, Weight Decreased, Fear
This is a report of a 46-year-old female patient (weight: NA) from DE, suffering from the following health symptoms/conditions: fatigue,asthenia,fluid retention,hyperthyroidism, who was treated with Euthyrox (dosage: Half Tablet Per Day, start time: 201302), combined with: NA. and developed a serious reaction and side effect(s): Muscle Spasms, Alopecia, Restless Legs Syndrome, Musculoskeletal Discomfort, Anxiety, Diarrhoea, Restlessness, Weight Decreased, Fear after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Euthyrox treatment in female patients, resulting in Muscle Spasms side effect. The patient was hospitalized.
Euthyrox Side Effect Report#9496822
Hypotension, Heart Rate Increased
This report suggests a potential Euthyrox Hypotension side effect(s) that can have serious consequences. A 31-year-old male patient (weight: NA) from CN was diagnosed with the following symptoms/conditions: thyroid cancer and used Euthyrox (dosage: NA) starting
Aug 03, 2013. After starting Euthyrox the patient began experiencing various side effects, including: Hypotension, Heart Rate IncreasedAdditional drugs used concurrently:
  • Oryzanol (oryzanol) (oryzanol)
Although Euthyrox demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Hypotension, may still occur.
Euthyrox Side Effect Report#9474987
Hyperadrenalism
This Hyperadrenalism problem was reported by a consumer or non-health professional from DE. A 76-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On NS this consumer started treatment with Euthyrox (dosage: NA). The following drugs were being taken at the same time: NA. When using Euthyrox, the patient experienced the following unwanted symptoms/side effects: HyperadrenalismAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Hyperadrenalism, may become evident only after a product is in use by the general population.
Euthyrox Side Effect Report#9474984
Autoimmune Thyroiditis, Pruritus, Alopecia, Ear Disorder, Ear Discomfort
This Autoimmune Thyroiditis side effect was reported by a consumer or non-health professional from IL. A 38-year-old female patient (weight:NA) experienced the following symptoms/conditions: hypothyroidism.The patient was prescribed Euthyrox (drug dosage: (50 Mcg,5 In 1 Wk)), which was initiated on 201202. Concurrently used drugs:
  • Omega 3 (fish Oil)
  • Complex B /00653501/
.After starting to take Euthyrox the consumer reported adverse symptoms, such as: Autoimmune Thyroiditis, Pruritus, Alopecia, Ear Disorder, Ear DiscomfortThese side effects may potentially be related to Euthyrox.
Euthyrox Side Effect Report#9453126
Musculoskeletal Discomfort, Thyroid Disorder, Chest Discomfort, Feeling Abnormal
This is a report of a 74-year-old female patient (weight: NA) from DE, suffering from the following health symptoms/conditions: autoimmune thyroiditis, who was treated with Euthyrox (dosage: NA, start time: NS), combined with: NA. and developed a serious reaction and side effect(s): Musculoskeletal Discomfort, Thyroid Disorder, Chest Discomfort, Feeling Abnormal after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Euthyrox treatment in female patients, resulting in Musculoskeletal Discomfort side effect.


1 of 6 


The appearance of Euthyrox 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.

Ask a Doctor Online
12 Doctors are Online.
A Question is Answered Every 9 Seconds!
Ask a Doctor >

Track Your Side Effects

Note Your Observations

It is really important to keep track of your health 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

    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.

    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.

    Euthyrox 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.

    Ask a Doctor Online
    12 Doctors are Online.
    A Question is Answered Every 9 Seconds!
    Ask a Doctor >

    Discuss Euthyrox Side Effects

    Did You Have a Euthyrox Side Effect?

    Yes, Severe
    Yes, Moderate
    Yes, Minor
    No

    How Effective is Euthyrox for You?

    Exceeded Expectations
    Effective
    Somewhat Effective
    Not Effective