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Thyroxine Side Effects

PatientsVille

Common Thyroxine Side Effects


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

Cerebral Haemorrhage (5)
Idiopathic Thrombocytopenic Purpura (4)
Carotid Arteriosclerosis (2)
Bradycardia (2)
Diarrhoea (2)
Dyspnoea (2)
Erythema Multiforme (2)
Dizziness (2)
Hyperthyroidism (2)
Leukocytoclastic Vasculitis (2)
Urticaria (2)
Supraventricular Extrasystoles (2)
Thrombocytopenia (2)
Rash (2)
Ocular Hyperaemia (2)
Platelet Count Decreased (2)
Muscular Weakness (1)
Musculoskeletal Pain (1)
Pain In Extremity (1)
Operative Haemorrhage (1)

➢ 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.

Thyroxine Side Effects Reported to FDA



Thyroxine Side Effect Report#9859388
Cellulitis Gangrenous, Pyrexia, Diarrhoea, Vomiting, Abdominal Pain, Chest Pain, Musculoskeletal Pain, Haemodynamic Instability, Dyspnoea
This is a report of a 50-year-old male patient (weight: NA) from GR, suffering from the following health symptoms/conditions: thyroidectomy, who was treated with Thyroxine (dosage: NA, start time: NS), combined with: NA. and developed a serious reaction and side effect(s): Cellulitis Gangrenous, Pyrexia, Diarrhoea, Vomiting, Abdominal Pain, Chest Pain, Musculoskeletal Pain, Haemodynamic Instability, Dyspnoea after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Thyroxine treatment in male patients, resulting in Cellulitis Gangrenous side effect. The patient was hospitalized.
Thyroxine Side Effect Report#9858751
Dizziness, Dizziness, Diarrhoea, Hypertension, Hypotension, Dyspnoea
This report suggests a potential Thyroxine Dizziness side effect(s) that can have serious consequences. A 78-year-old patient (weight: NA) from US was diagnosed with the following symptoms/conditions: NA and used Thyroxine (dosage: NA) starting 201305. After starting Thyroxine the patient began experiencing various side effects, including: Dizziness, Dizziness, Diarrhoea, Hypertension, Hypotension, DyspnoeaAdditional drugs used concurrently: NA. Although Thyroxine demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Dizziness, may still occur.
Thyroxine Side Effect Report#9857110
Exfoliative Rash, Muscular Weakness, Hypocalcaemia, Fatigue
This Exfoliative Rash problem was reported by a consumer or non-health professional from GR. A 61-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: thyroidectomy. On NS this consumer started treatment with Thyroxine (dosage: NA). The following drugs were being taken at the same time: NA. When using Thyroxine, the patient experienced the following unwanted symptoms/side effects: Exfoliative Rash, Muscular Weakness, Hypocalcaemia, FatigueThe 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 Exfoliative Rash, may become evident only after a product is in use by the general population.
Thyroxine Side Effect Report#9490489
Fibromyalgia, Irritable Bowel Syndrome, Balance Disorder, Thinking Abnormal, Memory Impairment, Weight Increased, Depression, Product Substitution Issue
This Fibromyalgia side effect was reported by a consumer or non-health professional from US. A female patient (weight:NA) experienced the following symptoms/conditions: hypothyroidism.The patient was prescribed Thyroxine (drug dosage: NA), which was initiated on
May 20, 2013. Concurrently used drugs:
  • Vitamin D
  • Estradiol
  • Prometrium
  • Cystone
.After starting to take Thyroxine the consumer reported adverse symptoms, such as: Fibromyalgia, Irritable Bowel Syndrome, Balance Disorder, Thinking Abnormal, Memory Impairment, Weight Increased, Depression, Product Substitution IssueThese side effects may potentially be related to Thyroxine.
Thyroxine Side Effect Report#9167461
Sensation Of Heaviness, Gait Disturbance, Pain In Extremity
This is a report of a 77-year-old female patient (weight: NA) from GB, suffering from the following health symptoms/conditions: hypothyroidism,intermittent claudication,blood cholesterol increased, who was treated with Thyroxine (dosage: NA, start time: 2006), combined with:
  • Aspirin
  • Simvastatin
and developed a serious reaction and side effect(s): Sensation Of Heaviness, Gait Disturbance, Pain In Extremity after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Thyroxine treatment in female patients, resulting in Sensation Of Heaviness side effect.
Thyroxine Side Effect Report#8816885
Hyperthyroidism, Ocular Hyperaemia, Erythema Multiforme, Supraventricular Extrasystoles, Carotid Arteriosclerosis, Bradycardia
This report suggests a potential Thyroxine Hyperthyroidism side effect(s) that can have serious consequences. A 66-year-old female patient (weight: NA) from Country Not Specified was diagnosed with the following symptoms/conditions: hypothyroidism and used Thyroxine (dosage: NA) starting NS. After starting Thyroxine the patient began experiencing various side effects, including: Hyperthyroidism, Ocular Hyperaemia, Erythema Multiforme, Supraventricular Extrasystoles, Carotid Arteriosclerosis, BradycardiaAdditional drugs used concurrently: NA.The patient was hospitalized. Although Thyroxine demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Hyperthyroidism, may still occur.
Thyroxine Side Effect Report#8816885
Hyperthyroidism, Ocular Hyperaemia, Erythema Multiforme, Supraventricular Extrasystoles, Carotid Arteriosclerosis, Bradycardia
This Hyperthyroidism problem was reported by a consumer or non-health professional from Country Not Specified. A 66-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: hypothyroidism. On NS this consumer started treatment with Thyroxine (dosage: NA). The following drugs were being taken at the same time:
  • Clonazepam(clonazepam)
  • Rosuvastatin(rosuvastatin)
  • Cinnarizine(cinnarizine)
  • Telmisartan/amlodipine(tablet) (telmisartan, Amlodipine)
  • Pantoprazole(pantoprazole)
When using Thyroxine, the patient experienced the following unwanted symptoms/side effects: Hyperthyroidism, Ocular Hyperaemia, Erythema Multiforme, Supraventricular Extrasystoles, Carotid Arteriosclerosis, BradycardiaThe 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 Hyperthyroidism, may become evident only after a product is in use by the general population.
Thyroxine Side Effect Report#8027224-9
Medulloblastoma Recurrent
This Medulloblastoma Recurrent side effect was reported by a health professional from United Kingdom. A 11-year-old male patient (weight:NA) experienced the following symptoms/conditions: NA.The patient was prescribed Thyroxine (levothyroxine Sodium0 (drug dosage: NA), which was initiated on
May 04, 2011. Concurrently used drugs:
  • Zomacton (somatropin) Powder And Solvent For Solution For Injection (1 Mg)
.After starting to take Thyroxine (levothyroxine Sodium0 the consumer reported adverse symptoms, such as: Medulloblastoma RecurrentThese side effects may potentially be related to Thyroxine (levothyroxine Sodium0.
Thyroxine Side Effect Report#7456306-5
Operative Haemorrhage, Serotonin Syndrome, Platelet Count Decreased
This is a report of a 60-year-old female patient (weight: NA) from United Kingdom, suffering from the following health symptoms/conditions: NA, who was treated with Thyroxine (dosage: NA, start time: NS), combined with:
  • Fentanyl (2545 Mcg;x1;)
  • Propofol
  • Paroxetine (no Pref. Name)
  • Isoflurane In Oxygen And Air
and developed a serious reaction and side effect(s): Operative Haemorrhage, Serotonin Syndrome, Platelet Count Decreased after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Thyroxine treatment in female patients, resulting in Operative Haemorrhage side effect.
Thyroxine Side Effect Report#7434794-8
Cerebral Haemorrhage, Idiopathic Thrombocytopenic Purpura
This report suggests a potential Thyroxine Cerebral Haemorrhage side effect(s) that can have serious consequences. A 64-year-old male patient (weight: NA) from was diagnosed with the following symptoms/conditions: NA and used Thyroxine (dosage: NA) starting
Oct 15, 2010. After starting Thyroxine the patient began experiencing various side effects, including: Cerebral Haemorrhage, Idiopathic Thrombocytopenic PurpuraAdditional drugs used concurrently:
  • Simvastatin (40mg - Daily - Oral)
Although Thyroxine demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Cerebral Haemorrhage, may still occur.
Thyroxine Side Effect Report#7432946-4
Rash, Acne, Urticaria, Pruritus
This Rash problem was reported by a consumer or non-health professional from United States. A female patient (weight: NA) was diagnosed with the following symptoms/conditions: thyroid disorder,blood cholesterol abnormal. On NS this consumer started treatment with Thyroxine (dosage: NA). The following drugs were being taken at the same time:
  • Simvastatin
  • Fish Oil
  • Amlodipine Besylate (10 Mg, 1x/day)
  • Calcium
When using Thyroxine, the patient experienced the following unwanted symptoms/side effects: Rash, Acne, Urticaria, PruritusAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Rash, may become evident only after a product is in use by the general population.
Thyroxine Side Effect Report#7401492-6
Cerebral Haemorrhage, Idiopathic Thrombocytopenic Purpura, Thrombocytopenia
This Cerebral Haemorrhage side effect was reported by a health professional from United Kingdom. A 64-year-old male patient (weight:NA) experienced the following symptoms/conditions: hypothyroidism,hypercholesterolaemia.The patient was prescribed Thyroxine (drug dosage: 50 Ug, Unk), which was initiated on
Oct 15, 2010. Concurrently used drugs:
  • Simvastatin (40 Mg, Qd)
.After starting to take Thyroxine the consumer reported adverse symptoms, such as: Cerebral Haemorrhage, Idiopathic Thrombocytopenic Purpura, ThrombocytopeniaThese side effects may potentially be related to Thyroxine.
Thyroxine Side Effect Report#7395868-3
Blood Bilirubin Increased, Rash, Febrile Neutropenia
This is a report of a 50-year-old female patient (weight: NA) from Canada, suffering from the following health symptoms/conditions: hypothyroidism,colorectal cancer metastatic, who was treated with Thyroxine (dosage: NA, start time:
Jun 17, 2010), combined with: NA. and developed a serious reaction and side effect(s): Blood Bilirubin Increased, Rash, Febrile Neutropenia after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Thyroxine treatment in female patients, resulting in Blood Bilirubin Increased side effect. The patient was hospitalized.
Thyroxine Side Effect Report#7368211-3
Platelet Count Decreased, Cerebral Haemorrhage
This report suggests a potential Thyroxine Platelet Count Decreased side effect(s) that can have serious consequences. A 64-year-old male patient (weight: NA) from United Kingdom was diagnosed with the following symptoms/conditions: NA and used Thyroxine (dosage: NA) starting
Oct 15, 2010. After starting Thyroxine the patient began experiencing various side effects, including: Platelet Count Decreased, Cerebral HaemorrhageAdditional drugs used concurrently:
  • Simvastatin (40 Mg, Daily, Oral)
Although Thyroxine demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Platelet Count Decreased, may still occur.
Thyroxine Side Effect Report#7363521-8
Lymphocytosis
This Lymphocytosis problem was reported by a health professional from United Kingdom. A 68-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: hypothyroidism,rheumatoid arthritis. On
Nov 01, 2009 this consumer started treatment with Thyroxine (dosage: 100 Ug, 1x/day). The following drugs were being taken at the same time:
  • Meloxicam (7.5 Mg, 1x/day)
  • Enbrel (50 Mg, Weekly)
  • Prednisolone (7.5 Mg, 1x/day)
When using Thyroxine, the patient experienced the following unwanted symptoms/side effects: LymphocytosisAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Lymphocytosis, may become evident only after a product is in use by the general population.
Thyroxine Side Effect Report#7341231-0
Cerebral Haemorrhage, Idiopathic Thrombocytopenic Purpura, Thrombocytopenia
This Cerebral Haemorrhage side effect was reported by a health professional from United Kingdom. A 64-year-old male patient (weight:NA) experienced the following symptoms/conditions: hypothyroidism,hypercholesterolaemia.The patient was prescribed Thyroxine (drug dosage: NA), which was initiated on
Oct 15, 2010. Concurrently used drugs:
  • Simvastatin (40 Mg, Daily)
.After starting to take Thyroxine the consumer reported adverse symptoms, such as: Cerebral Haemorrhage, Idiopathic Thrombocytopenic Purpura, ThrombocytopeniaThese side effects may potentially be related to Thyroxine.
Thyroxine Side Effect Report#7321818-1
Cerebral Haemorrhage, Idiopathic Thrombocytopenic Purpura
This is a report of a 64-year-old male patient (weight: NA) from , suffering from the following health symptoms/conditions: NA, who was treated with Thyroxine (dosage: NA, start time:
Oct 15, 2010), combined with:
  • Simvastatin (40mg - Daily - Oral)
and developed a serious reaction and side effect(s): Cerebral Haemorrhage, Idiopathic Thrombocytopenic Purpura after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Thyroxine treatment in male patients, resulting in Cerebral Haemorrhage side effect.
Thyroxine Side Effect Report#4877351-X
Swelling Face, Urticaria
This report suggests a potential Thyroxine Swelling Face side effect(s) that can have serious consequences. A 69-year-old patient (weight: NA) from United Kingdom was diagnosed with the following symptoms/conditions: NA and used Thyroxine (dosage: NA) starting
Nov 24, 2005. After starting Thyroxine the patient began experiencing various side effects, including: Swelling Face, UrticariaAdditional drugs used concurrently:
  • Aspirin
  • Lisinopril
  • Bendrofluazide
  • Ferrous Sulfate Tab
  • Diclofenac (75mg Daily)
Although Thyroxine demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Swelling Face, may still occur.
Thyroxine Side Effect Report#4818964-0
Leukocytoclastic Vasculitis
This Leukocytoclastic Vasculitis problem was reported by a physician from Australia. A female patient (weight: NA) was diagnosed with the following symptoms/conditions: hypothyroidism,depression. On
Jan 01, 2002 this consumer started treatment with Thyroxine (dosage: Daily Dose: 100 Microgram(s)). The following drugs were being taken at the same time:
  • Luvox (Daily Dose: 50 Milligram(s))
When using Thyroxine, the patient experienced the following unwanted symptoms/side effects: Leukocytoclastic VasculitisAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Leukocytoclastic Vasculitis, may become evident only after a product is in use by the general population.
Thyroxine Side Effect Report#4801392-1
Leukocytoclastic Vasculitis
This Leukocytoclastic Vasculitis side effect was reported by a physician from Australia. A female patient (weight:NA) experienced the following symptoms/conditions: ill-defined disorder,depression.The patient was prescribed Thyroxine (drug dosage: NA), which was initiated on
Jan 01, 2002. Concurrently used drugs:
  • Luvox (Daily Dose: 50 Milligram(s))
.After starting to take Thyroxine the consumer reported adverse symptoms, such as: Leukocytoclastic VasculitisThese side effects may potentially be related to Thyroxine.



The appearance of Thyroxine 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.

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.

    Thyroxine 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.

    Discuss Thyroxine Side Effects

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    Thyroxine Safety Alerts, Active Ingredients, Usage Information

    NDC0378-1800
    TypeHUMAN PRESCRIPTION DRUG
    Proprietary NameLevothyroxine Sodium
    Namelevothyroxine sodium
    Dosage FormTABLET
    RouteORAL
    On market since20021101
    LabelerMylan Pharmaceuticals Inc.
    Active Ingredient(s)LEVOTHYROXINE SODIUM
    Strength(s)25
    Unit(s)ug/1
    Pharma Classl-Thyroxine [EPC],Thyroxine [Chemical/Ingredient]

    More About Thyroxine

    Side Effects reported to FDA: 20

    Thyroxine safety alerts: 2004

    Reported deaths: 5

    Reported hospitalizations: 5

    Levoxyl (levothyroxine sodium)

    Audience: Endocrinologists and other healthcare professionals

    FDA and King Pharmaceuticals notified healthcare professionals of revisions to the PRECAUTIONS, ADVERSE REACTIONS and DOSAGE AND ADMINISTRATION sections of labeling, describing reports of choking, gagging, tablets stuck in throat and dysphagia while taking Levoxyl. These reports have predominately occurred when Levoxyl tablets were not taken with water. It is recommended that Levoxyl tablets be taken with a full glass of water.

    [September 17, 2004 - Letter - King Pharmaceuticals]

    Latest Thyroxine clinical trials