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Pain In Joints (82)
FATNESS AND NOT LOOSE WEIGHT (66)
Tired (58)
Hair Loss (41)
INSOMNIA AND HEAD ACHE (37)
Dry Mouth (27)
Weight Loss (24)
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Euthyrox Side Effects and Adverse Effects reported to US Food and Drug Administration (FDA)

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Showing 1-25 of 59 

Lung Neoplasm Malignant, Aspergilloma (7468979-1)
on Apr 19, 2011 Male from SWITZERLAND , 75 years of age, weighting 185.0 lb, was treated with Euthyrox. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: lung neoplasm malignant, aspergilloma. Euthyrox dosage: N/A.
Associated medications used:
  • Warfarin Sodium
  • Lisinopril
  • Vytorin (10-40 Mg/daily/po)
  • Seretide
  • Aspirin
Patient was hospitalized.

Myocardial Infarction, Cardiac Failure (7458316-0)
Patient was taking Euthyrox. Patient felt the following Euthyrox side effects: myocardial infarction, cardiac failure on May 02, 2011 from AUSTRIA Additional patient health information: Female , 74 years of age, weighting 183.0 lb, . Euthyrox dosage: N/A.
Multiple prescriptions taken:
  • Diclobene
  • Xanor (0.75mg Daily)
  • Zemplar
  • Dilatrend
  • Pantoloc
  • Lasix
  • Exforge (10/160mg)
  • Lovenox


Accidental Overdose, Pelvic Pain (7451943-6)
Adverse event was reported on Jan 20, 2009 by a Female taking Euthyrox (Dosage: 50 Ug, Unk) . Location: AUSTRIA , weighting 194.0 lb, After Euthyrox was administered, patient encountered several Euthyrox side effects: accidental overdose, pelvic pain.
Multiple concurrent drugs taken:
  • Nexium (20 Mg, Unk)
  • Tenormin (50 Mg, Unk)
  • Azithromycin Hexal (2 Df)


Femoral Neck Fracture, Renal Failure Acute, Rash Erythematous, Dermatitis Allergic, Fluid Retention (7445213-X)
on Apr 08, 2011 Female from GERMANY , 94 years of age, was treated with Euthyrox N (levothyroxine Sodium) (tablets) (levothyroxine Sodium). Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: femoral neck fracture, renal failure acute, rash erythematous, dermatitis allergic, fluid retention. Euthyrox N (levothyroxine Sodium) (tablets) (levothyroxine Sodium) dosage: N/A.
Associated medications used:
  • 1 (10 Mg (10 Mg,1 In D),oral, 5 Mg (5 Mg,1 In 1 D),oral)
Patient was hospitalized.


Optic Neuritis, Dizziness, Headache, Uveitis, Vomiting, Abdominal Pain, Chest Pain (7435270-9)
on Apr 20, 2011 Female from BRAZIL , weighting 130.1 lb, was diagnosed with
  • hypothyroidism
  • uveitis
  • ankylosing spondylitis
  • cardiac disorder
and was treated with Euthyrox. Patient felt the following Euthyrox side effects: optic neuritis, dizziness, headache, uveitis, vomiting, abdominal pain, chest pain. Euthyrox dosage: N/A.
Multiple prescriptions taken:
  • Calcort
  • Methotrexate
  • Inderal
  • Humira
  • Inderal
  • Vitamin D


Deep Vein Thrombosis (7434867-X)
Patient was taking Euthyrox. After Euthyrox was administered, patient encountered several Euthyrox side effects: deep vein thrombosis on Apr 21, 2011 from GERMANY Additional patient health information: Female , weighting 189.6 lb, . Euthyrox dosage: Reported As: Euthyreox..
Multiple concurrent drugs taken:
  • Trastuzumab (Loading Dose: 8 Mg/kg, Form: Vials)
  • Trastuzumab (Total Dose: 516 Mg)
  • Oxazepam
  • Metoprolol
  • Docetaxel (Total Dose: 150 Mg, Form: Vials, Last Dose: 10 Sep 2010)
  • Hydrochlorothiazide
  • Carboplatin (Dose Level: 6 Auc, Total Dose: 712.9 Mg, Form: Vials, Last Dose 10 Sep 2010)
Patient was hospitalized.

Gastritis (7409132-7)
Adverse event was reported on Apr 05, 2011 by a Female taking Euthyrox (Dosage: Frequency : 50 Mg Morning) was diagnosed with
  • hypothyroidism
and. Location: GERMANY , weighting 174.2 lb, Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: gastritis.
Associated medications used:
  • Magaldrat (Frequency : 800 Mg As Required.)
  • Rivotril (Intake For Years)
  • Lamotrigine (Units Not Reported : 100 Daily.)
  • Valproate Sodium


Lumbar Vertebral Fracture, Dizziness, Pyrexia, Headache, Injection Site Induration, Osteoporosis, Thoracic Vertebral Fracture, Bone Pain (7393085-4)
on Apr 01, 2011 Male from GERMANY , weighting 144.4 lb, was treated with Euthyrox. Patient felt the following Euthyrox side effects: lumbar vertebral fracture, dizziness, pyrexia, headache, injection site induration, osteoporosis, thoracic vertebral fracture, bone pain. Euthyrox dosage: N/A.
Multiple prescriptions taken:
  • Enantone Monatsdepot
Patient was hospitalized.

Nausea, Vomiting (7388649-8)
on Mar 16, 2011 Female from CHINA , 55 years of age, was treated with Euthyrox. After Euthyrox was administered, patient encountered several Euthyrox side effects: nausea, vomiting. Euthyrox dosage: N/A.
Multiple concurrent drugs taken:
  • Metoprolol Tartrate
  • Aspirin
  • Livalo (2 Mg; 1x; Po, 2 Mg; 1x; Po)
  • Livalo (2 Mg; 1x; Po, 2 Mg; 1x; Po)
  • Novolin 30r /00806401/
  • Fosinopril Sodium
  • Amlodipine Besylate
Patient was hospitalized.

Syncope (7369802-6)
Patient was taking Euthyrox. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: syncope on Mar 10, 2011 from GERMANY Additional patient health information: Female , weighting 160.9 lb, was diagnosed with
  • post procedural hypothyroidism
  • hypoparathyroidism
  • hypertension
  • glaucoma
and. Euthyrox dosage: 200 Ug.
Associated medications used:
  • Alfadiol (2 Ug)
  • Preductal (70 Mg, Qd)
  • Cosopt (2 Gtt, Qd (eye Drops))
  • Concor (1.25 Mg, Qd)
  • Sylimarol (70 Mg, Qd)
  • Molsidomina (4 Mg, Qd)
  • Acard (75 Mg, Qd)
  • Sorafenib (raf Kinase Inhibitor) (600 Mg, Qd)
Patient was hospitalized.

Gastrointestinal Disorder, Headache, Gastrooesophageal Reflux Disease, Skin Lesion (7354952-0)
Adverse event was reported on Feb 25, 2011 by a Female taking Euthyrox 50 Mcg (levothyroxine Sodium) (50 Microgram, Tablet) (levothy (Dosage: N/A) . Location: GUATEMALA , 14 years of age, Patient felt the following Euthyrox side effects: gastrointestinal disorder, headache, gastrooesophageal reflux disease, skin lesion.

Polyneuropathy (7336378-9)
on Feb 24, 2011 Male from GERMANY , 58 years of age, weighting 211.6 lb, was treated with Euthyrox. After Euthyrox was administered, patient encountered several Euthyrox side effects: polyneuropathy. Euthyrox dosage: 175 Ug, Unk.
Multiple concurrent drugs taken:
  • Pantozol (20 Mg, Daily)
  • Simvastatin (20 Mg, Unk)
  • Atacand (8 Mg, Unk)


Lymphoma (7336299-1)
on Mar 01, 2011 Female from VENEZUELA , 71 years of age, was diagnosed with
  • thyroid disorder
  • hypercholesterolaemia
and was treated with Euthyrox. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: lymphoma. Euthyrox dosage: 100 Ug, 1x/day.
Associated medications used:
  • Lipitor (20 Mg, 1x/day)


Menorrhagia (7293784-9)
Patient was taking Euthyrox 125 Mcg (levothyroxine Sodium)(levothyroxine Sodium). Patient felt the following Euthyrox side effects: menorrhagia on Jan 24, 2011 from SERBIA Additional patient health information: Female , 17 years of age, was diagnosed with
  • hypothyroidism
and. Euthyrox 125 Mcg (levothyroxine Sodium)(levothyroxine Sodium) dosage: (125 Mcg, 1 In 1 D) Oral, 100 Mcg (100 Mcg, 1 In 1. D) Oral, Oral. Patient was hospitalized.

Dehydration, Syncope, Balance Disorder, Electrolyte Imbalance, Cerebellar Atrophy, Diabetes Mellitus Inadequate Control, Treatment Noncompliance, Fall, Mental Impairment (7291927-4)
Adverse event was reported on Feb 04, 2011 by a Female taking Euthyrox (Dosage: N/A) . Location: CZECH REPUBLIC , weighting 136.7 lb, After Euthyrox was administered, patient encountered several Euthyrox side effects: dehydration, syncope, balance disorder, electrolyte imbalance, cerebellar atrophy, diabetes mellitus inadequate control, treatment noncompliance, fall, mental impairment.
Multiple concurrent drugs taken:
  • Tenaxum
  • Furon
  • Citalec
  • Lantus
  • Atrial Natriuretic Peptide
  • Vasocardin
  • Anopyrin
  • Orcal
Patient was hospitalized.

Fatigue, Pharyngeal Oedema, Cough, Eructation, Micturition Urgency, Abdominal Distension (7279747-8)
on Jan 28, 2011 Female from GERMANY , 55 years of age, was treated with Euthyrox. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: fatigue, pharyngeal oedema, cough, eructation, micturition urgency, abdominal distension. Euthyrox dosage: 125 Ug, Unk.
Associated medications used:
  • Tilidin (40 Gtt, Qd (in Evening))
  • Torsemide (10 Mg, Unk)
  • Stilnox (1 Df, Qd)
  • Rasilez (1 Df (300 Mg), Qd)
  • Pantozol (40 Mg, Qd)


Vaginal Haemorrhage (7225314-1)
on Jan 10, 2011 Female from CROATIA (local name: Hrvatska) , weighting 147.7 lb, was diagnosed with
  • thyroiditis
and was treated with Euthyrox. Patient felt the following Euthyrox side effects: vaginal haemorrhage. Euthyrox dosage: 50 Mcg, Qd.
Multiple prescriptions taken:
  • Alemtuzumab (12 Mg, Qdx3)
  • Alemtuzumab (12 Mg, Qdx5)


(7213881-3)
Patient was taking Euthyrox. on Jan 03, 2011 from AUSTRIA Additional patient health information: Female , 74 years of age, weighting 183.0 lb, . Euthyrox dosage: N/A.
Multiple concurrent drugs taken:
  • Cipralex
  • Tramal
  • Dibondrin
  • Lovenox
  • Diclobene
  • Zemplar
  • Dreisacarb
  • Ciproxin


Ventricular Extrasystoles (7135868-1)
Adverse event was reported on Nov 10, 2010 by a Female taking Euthyrox 100 Mcg(levothyroxine Sodium)(levothyroxine Sodium) (Dosage: (100 Mcg) Oral) was diagnosed with
  • post procedural hypothyroidism
  • menopausal symptoms
and. Location: SPAIN , 44 years of age, Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: ventricular extrasystoles.
Associated medications used:
  • Phyto Soya (glycine Max Seed Oil)(glycine Max Seed Oil) (Oral)


Asthenia, Autoantibody Positive, Constipation, Product Quality Issue (7098696-1)
on Oct 19, 2010 Female from RUSSIAN FEDERATION , child 2 years of age, was diagnosed with
  • congenital hypothyroidism
and was treated with Euthyrox 100 Mcg (levothyroxine Sodium) (100 Microgram) (levothyroxine. Patient felt the following Euthyrox side effects: asthenia, autoantibody positive, constipation, product quality issue. Euthyrox 100 Mcg (levothyroxine Sodium) (100 Microgram) (levothyroxine dosage: 37.5 Mcg (37.5 Mcg,1 In 1 D).

Haemoglobin Decreased, Haemoptysis, Hypertensive Crisis, Pneumonia Aspiration, Tracheitis (6285918-X)
on Jul 15, 2009 Male from SWITZERLAND , 77 years of age, was treated with Euthyrox. After Euthyrox was administered, patient encountered several Euthyrox side effects: haemoglobin decreased, haemoptysis, hypertensive crisis, pneumonia aspiration, tracheitis. Euthyrox dosage: N/A.
Multiple concurrent drugs taken:
  • Nexium
  • Xatral
  • Tolterodine Tartrate
  • Lasix
  • Bactrim Ds
  • Tienam
  • Aredia (30 Mg/ Trimester)
  • Prednison
Patient was hospitalized.

Blood Thyroid Stimulating Hormone Increased, Tachycardia (6090915-3)
Patient was taking Euthyrox (100 Microgram, Tablet) (levothyroxine Sodium). Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: blood thyroid stimulating hormone increased, tachycardia on Jan 28, 2009 from GREECE Additional patient health information: Female , 54 years of age, was diagnosed with
  • hypothyroidism
and. Euthyrox (100 Microgram, Tablet) (levothyroxine Sodium) dosage: (2.25 Dosage Forms,every Morning (monday To Saturday)) Oral; (1.5 Dosage Forms,sunday Morning) Oral.

Blood Thyroid Stimulating Hormone Increased, Tachycardia (6089187-5)
Adverse event was reported on Jan 28, 2009 by a Female taking Euthyrox (100 Microgram, Tablet) (levothyroxine Sodium) (Dosage: (1.25 Dosage Forms, Every Morning (monday To Saturday) Oral : (1.5 Dosage Forms, Sunday Morning) Or) was diagnosed with
  • hypothyroidism
and. Location: GREECE , 54 years of age, Patient felt the following Euthyrox side effects: blood thyroid stimulating hormone increased, tachycardia.

Anuria, Completed Suicide, Fall, Gastric Haemorrhage, Gastric Ulcer, Haematoma, Haemoglobin Decreased, Melaena (5417915-8)
on Jul 23, 2007 Female from AUSTRIA , 55 years of age, was diagnosed with
  • completed suicide
and was treated with Euthyrox (tablet) (levothyroxine Sodium). After Euthyrox was administered, patient encountered several Euthyrox side effects: anuria, completed suicide, fall, gastric haemorrhage, gastric ulcer, haematoma, haemoglobin decreased, melaena. Euthyrox (tablet) (levothyroxine Sodium) dosage: 20 Tablets (75 Mcg, 1 In 1 Once) Oral. Patient was hospitalized.

Urticaria (5324997-0)
on May 10, 2007 Female from SLOVAKIA (Slovak Republic) , 30 years of age, was treated with Euthyrox. Directly after, patient experienced the unwanted or unexpected Euthyrox side effects: urticaria. Euthyrox dosage: N/A.
Associated medications used:
  • Cetirizine Hcl
  • Cefotaxime
  • Parlodel (1 Tablet/day)
Patient was hospitalized.

Showing 1-25 of 59 

Euthyrox Health Episodes

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Most drugs have a large list of nonsevere or mild adverse effects which do not rule out continued usage. These effects depend on individual sensitivity, and can include nausea, dizziness, diarrhea, malaise, vomiting, headache, dermatitis, dry mouth, etc. Check commonly reported side effects . These can be considered a form of pseudo-allergic reaction, as not all users experience these effects; many users experience none at all.

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 Information

More About Euthyrox

Side Effects reported to FDA: 59. View Euthyrox Adverse Reports

Euthyrox safety alerts: No

Reported deaths: 7

Reported hospitalizations: 23

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