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Euthyrox Side Effects

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.

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.

Euthyrox Side Effects Reported to FDA

The following 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.


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.
Mental Impairment, Myalgia, Arthralgia, Abdominal Pain Upper, Weight Increased, Crying, Night Sweats, Amnesia
on Mar 14, 2014 Female from DK , 59 years of age, was diagnosed with and was treated with Euthyrox. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: mental impairment, myalgia, arthralgia, abdominal pain upper, weight increased, crying, night sweats, amnesia. Euthyrox dosage: N/A.

Blood Thyroid Stimulating Hormone Increased, Incorrect Dose Administered
Patient was taking Euthyrox. Patient felt the following Euthyrox side effects: blood thyroid stimulating hormone increased, incorrect dose administered on Mar 07, 2014 from ES Additional patient health information: Male , 87 years of age, . Euthyrox dosage: 75 Mcg 2 In 1 D.

Atrial Fibrillation
Adverse event was reported on Feb 21, 2014 by a Female taking Euthyrox (Dosage: N/A) was diagnosed with and. Location: DE , 58 years of age, After Euthyrox was administered, patient encountered several Euthyrox side effects: atrial fibrillation. Patient was hospitalized.

Blood Thyroid Stimulating Hormone Increased, Product Counterfeit, Maternal Exposure During Pregnancy
on Jan 27, 2014 Female from RU , 58 years of age, was diagnosed with and was treated with Euthyrox 125 (levothyroxine Sodium) (tablet) (levothyroxine Sodium),151276. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: blood thyroid stimulating hormone increased, product counterfeit, maternal exposure during pregnancy. Euthyrox 125 (levothyroxine Sodium) (tablet) (levothyroxine Sodium),151276 dosage: 1/2 Tablet.


Laryngeal Dyspnoea
on Feb 18, 2014 Female from DE , 58 years of age, was diagnosed with and was treated with Euthyrox. Patient felt the following Euthyrox side effects: laryngeal dyspnoea. Euthyrox dosage: N/A.
Multiple prescriptions taken:
  • L-thyroxine


Convulsion, Muscle Spasms, Eye Swelling, Tri-iodothyronine Increased, Thyroxine Increased
Patient was taking Euthyrox. After Euthyrox was administered, patient encountered several Euthyrox side effects: convulsion, muscle spasms, eye swelling, tri-iodothyronine increased, thyroxine increased on Jan 23, 2014 from CN Additional patient health information: Female , 36 years of age, was diagnosed with and. Euthyrox dosage: N/A.
Multiple concurrent drugs taken:
  • Calcium (calcium) (tablets) (calcium)


Anxiety, Suicidal Ideation, Depression, Cardiac Arrest, Chest Pain, Dyspnoea, Disability, Memory Impairment
Adverse event was reported on Dec 20, 2013 by a Female taking Euthyrox (Dosage: N/A) was diagnosed with and. Location: DK , 28 years of age, Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: anxiety, suicidal ideation, depression, cardiac arrest, chest pain, dyspnoea, disability, memory impairment. Patient was hospitalized.

Ocular Hyperaemia, Eye Haemorrhage, Tongue Paralysis, Chest Discomfort, Oedema Mouth, Headache
on Dec 17, 2013 Female from DE , 78 years of age, was diagnosed with and was treated with Euthyrox. Patient felt the following Euthyrox side effects: ocular hyperaemia, eye haemorrhage, tongue paralysis, chest discomfort, oedema mouth, headache. Euthyrox dosage: (75 Mcg).
Multiple prescriptions taken:
  • Novothyral ((1, 3/4, 1/2))
Patient was hospitalized.

Thyroid Cancer, Dizziness, Eye Swelling, Headache, Arrhythmia, Insomnia
on Feb 18, 2014 Female from CN , 74 years of age, was diagnosed with and was treated with Euthyrox. After Euthyrox was administered, patient encountered several Euthyrox side effects: thyroid cancer, dizziness, eye swelling, headache, arrhythmia, insomnia. Euthyrox dosage: 50 Mcg (50 Mcg, 1 In 1 D), Oral.

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
Patient was taking Euthyrox 175 Mcg. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: 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 on Dec 03, 2013 from ES Additional patient health information: Female , 61 years of age, was diagnosed with and. Euthyrox 175 Mcg dosage: (175 Mcg , 1 In 1 D) Oral (levothyroxine Sodium) (levothyroxine Sodium).
Associated medications used:
  • Aldocumar
  • Furosemide
  • Metamizol Magnesium) (metamizole Magnesium) (metamizole Magnesium)
  • Ameride Amiloride Hydrochloride) (moduretic) (hydrochlorothiazide,amiloride Hydrochloride)
Patient was hospitalized.

Convulsion, Urinary Tract Infection
Adverse event was reported on Dec 03, 2013 by a Female taking Euthyrox (Dosage: N/A) was diagnosed with and. Location: CH , 20 years of age, Patient felt the following Euthyrox side effects: convulsion, urinary tract infection.
Multiple prescriptions taken:
  • Bupropion
  • Desvenlafaxine
  • Abilify (aripirazole)
Patient was hospitalized.

Product Counterfeit, No Therapeutic Response, Maternal Exposure During Pregnancy
on Nov 25, 2013 Female from RU , 22 years of age, was treated with Euthyrox. After Euthyrox was administered, patient encountered several Euthyrox side effects: product counterfeit, no therapeutic response, maternal exposure during pregnancy. Euthyrox dosage: 100 Mcg.

Respiratory Distress, Hypoaesthesia Oral, Palatal Oedema, Uvulitis, Malaise
on Nov 19, 2013 Female from US , 66 years of age, was diagnosed with and was treated with Euthyrox. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: respiratory distress, hypoaesthesia oral, palatal oedema, uvulitis, malaise. Euthyrox dosage: N/A.

Abdominal Pain, Hypoaesthesia, Palpitations, Insomnia, Night Sweats, Lactose Intolerance
Patient was taking Euthyrox. Patient felt the following Euthyrox side effects: abdominal pain, hypoaesthesia, palpitations, insomnia, night sweats, lactose intolerance on Jan 09, 2014 from DE Additional patient health information: Female , 74 years of age, was diagnosed with and. Euthyrox dosage: N/A.
Multiple prescriptions taken:
  • Simvastatin (simvastatin) (simvastatin)
Patient was hospitalized.

Weight Decreased
Adverse event was reported on Oct 25, 2013 by a Female taking Euthyrox (Dosage: 25 Mcg Cada 24 Horas) was diagnosed with and. Location: ES , 47 years of age, After Euthyrox was administered, patient encountered several Euthyrox side effects: weight decreased.
Multiple concurrent drugs taken:
  • Bio Three


Angina Pectoris, Feeling Cold, Gait Disturbance, Vertigo, Hypoglycaemia, Hypotonia, Alopecia, Dry Skin
on Oct 25, 2013 Female from DE , 69 years of age, was diagnosed with and was treated with Euthyrox. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: angina pectoris, feeling cold, gait disturbance, vertigo, hypoglycaemia, hypotonia, alopecia, dry skin. Euthyrox dosage: N/A.

Liver Injury
on Oct 10, 2013 Female from CN , 32 years of age, was diagnosed with and was treated with Euthyrox. Patient felt the following Euthyrox side effects: liver injury. Euthyrox dosage: N/A.

Heart Rate Irregular, Chest Discomfort, Dyspnoea, Fluid Retention, Dizziness, Muscle Contracture, Myalgia, Arthralgia, Headache
Patient was taking Euthyrox. After Euthyrox was administered, patient encountered several Euthyrox side effects: heart rate irregular, chest discomfort, dyspnoea, fluid retention, dizziness, muscle contracture, myalgia, arthralgia, headache on Oct 18, 2013 from SE Additional patient health information: Female , 58 years of age, was diagnosed with and. Euthyrox dosage: 1 Df (100 Mcg,per Day).
Multiple concurrent drugs taken:
  • Behepan (cyanocobalamin) (cyanocobalamin)


Anti-thyroid Antibody Positive, Hypophagia, Weight Decreased, Arrhythmia, Restlessness, Hyperhidrosis, Vomiting, Initial Insomnia
Adverse event was reported on Oct 25, 2013 by a Female taking Euthyrox (Dosage: 1-1/4 Tablet (50mcg, 1 In 1 D)) . Location: CN , 60 years of age, Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: anti-thyroid antibody positive, hypophagia, weight decreased, arrhythmia, restlessness, hyperhidrosis, vomiting, initial insomnia.

Pemphigus, Skin Atrophy, Pemphigoid, Hypothyroidism
on Sep 17, 2013 Female from CH , 42 years of age, was diagnosed with and was treated with Euthyrox. Patient felt the following Euthyrox side effects: pemphigus, skin atrophy, pemphigoid, hypothyroidism. Euthyrox dosage: 75 Mcg (75 Mcg..
Multiple prescriptions taken:
  • Pantoprazole


Muscle Spasms, Alopecia, Restless Legs Syndrome, Musculoskeletal Discomfort, Anxiety, Diarrhoea, Restlessness, Weight Decreased, Fear
on Jan 09, 2014 Female from DE , 46 years of age, was diagnosed with and was treated with Euthyrox. After Euthyrox was administered, patient encountered several Euthyrox side effects: muscle spasms, alopecia, restless legs syndrome, musculoskeletal discomfort, anxiety, diarrhoea, restlessness, weight decreased, fear. Euthyrox dosage: Half Tablet Per Day. Patient was hospitalized.

Hypotension, Heart Rate Increased
Patient was taking Euthyrox. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: hypotension, heart rate increased on Aug 30, 2013 from CN Additional patient health information: Male , 31 years of age, was diagnosed with and. Euthyrox dosage: N/A.
Associated medications used:
  • Oryzanol (oryzanol) (oryzanol)


Hyperadrenalism
Adverse event was reported on Aug 20, 2013 by a Female taking Euthyrox (Dosage: N/A) . Location: DE , 76 years of age, Patient felt the following Euthyrox side effects: hyperadrenalism.

Autoimmune Thyroiditis, Pruritus, Alopecia, Ear Disorder, Ear Discomfort
on Nov 08, 2013 Female from IL , 38 years of age, was diagnosed with and was treated with Euthyrox. After Euthyrox was administered, patient encountered several Euthyrox side effects: autoimmune thyroiditis, pruritus, alopecia, ear disorder, ear discomfort. Euthyrox dosage: (50 Mcg,5 In 1 Wk).
Multiple concurrent drugs taken:
  • Omega 3 (fish Oil)
  • Complex B /00653501/


Musculoskeletal Discomfort, Thyroid Disorder, Chest Discomfort, Feeling Abnormal
on Aug 05, 2013 Female from DE , 74 years of age, was diagnosed with and was treated with Euthyrox. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: musculoskeletal discomfort, thyroid disorder, chest discomfort, feeling abnormal. Euthyrox dosage: N/A.

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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


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  • 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.

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