Synthroid Safety Information and Side Effects

Synthroid Safety Information

Fatigue ( 466 reports)    ➢ More

Body Temperature Decreased, Hypothyroidism, Fatigue, Constipation, Weight Increased

This case suggests a potential Synthroid Fatigue side effect(s) that can have serious consequences. A 51-year-old female patient from US (weight:NA) was diagnosed with the following health condition(s): autoimmune thyroiditis and used Synthroid (dosage: One And A Half Tablets To Equal 75mcg/day.) starting 2013. Soon after starting Synthroid the patient began experiencing various side effects, including:
  • Body Temperature Decreased
  • Hypothyroidism
  • Fatigue
  • Constipation
  • Weight Increased
Drugs used concurrently:NA. Although Synthroid demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Fatigue, may still occur.

Alopecia ( 297 reports)    ➢ More

Alopecia, Dyspnoea, Memory Impairment, Bone Loss, Hypotonia, Product Substitution Issue

Adverse event was reported on Mar 07, 2014 by a Female taking Synthroid (Dosage: 175 Mg 1 Pill Daily 4days A Week) was diagnosed with and. Location: US , 18 years of age, weighting 175.0 lb, Directly after treatment started, patient experienced the unwanted or unexpected Synthroid side effects: alopecia, dyspnoea, memory impairment, bone loss, hypotonia, product substitution issue.
Associated medications used:
  • Vitamin D

Headache ( 269 reports)    ➢ More

Cerebrospinal Fluid Leakage, Dural Tear, Csf Pressure Increased, Skull Fractured Base, Headache, Balance Disorder, Benign Intracranial Hypertension

This Headache problem was reported by a consumer or non-health professional from US. A female patient (weight: NA) was diagnosed with the following medical condition(s): hypothyroidism,hypertension,gastrooesophageal reflux disease,respiratory tract congestion,depression.On 1990 a consumer started treatment with Synthroid (dosage: NA). The following health products were being taken at the same time:
  • Cozaar
  • Protonix
  • Singulair
  • Wellbutrin
  • Effexor
  • Multivitamin
  • Aspirin
  • When commencing Synthroid, the patient experienced the following unwanted symptoms /side effects:
    • Cerebrospinal Fluid Leakage
    • Dural Tear
    • Csf Pressure Increased
    • Skull Fractured Base
    • Headache
    • Balance Disorder
    • Benign Intracranial Hypertension
    Although all health products are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Headache, may become evident only after a product is in use by the general population.

    Dizziness ( 265 reports)    ➢ More

    Chest Pain, Loss Of Consciousness, Dizziness, Aortic Aneurysm, Intervertebral Disc Protrusion, Osteoarthritis, Osteoporosis

    A case of a 56-year-old female patient (weight: NA) from US was presented. The patient developed the following symptoms/conditions: hypothyroidism and was treated with Synthroid (dosage: NA) starting 1990. Concurrently used drugs: NA. Soon after that, the subject experienced the following of symptoms:
    • Chest Pain
    • Loss Of Consciousness
    • Dizziness
    • Aortic Aneurysm
    • Intervertebral Disc Protrusion
    • Osteoarthritis
    • Osteoporosis
    This opens a possibility that Synthroid could cause Dizziness and that some female subjects may be more susceptible.

    Nausea ( 255 reports)    ➢ More

    Ulcer Haemorrhage, Fatigue, Nausea, Dizziness, Melaena, Loss Of Consciousness, Haemoglobin Decreased, Stress, Headache

    on Nov 21, 2013 a male from US , 51 years of age, weighting 173.2 lb, was diagnosed with and was treated with Synthroid. Directly after treatment started, patient experienced the unwanted or unexpected Synthroid side effects: ulcer haemorrhage, fatigue, nausea, dizziness, melaena, loss of consciousness, haemoglobin decreased, stress, headache. Synthroid dosage: NA. The patient was hospitalized.

    Common Synthroid Side Effects

    Click to view detailed reports:

    Fatigue (538)
    Headache (334)
    Alopecia (330)
    Dizziness (328)
    Nausea (322)
    Weight Increased (303)
    Palpitations (272)
    Feeling Abnormal (271)
    Insomnia (269)
    Dyspnoea (245)
    Blood Thyroid Stimulating Hormone Increased (243)
    Diarrhoea (243)
    Rash (236)
    Anxiety (232)
    Pain (230)
    Pruritus (228)
    Malaise (202)
    Asthenia (201)
    Arthralgia (196)
    Chest Pain (176)
    Vomiting (121)
    Weight Decreased (118)
    Depression (112)
    Heart Rate Increased (111)
    Coeliac Disease (110)
    Pain In Extremity (107)
    Muscle Spasms (107)
    Abdominal Pain Upper (106)
    Hyperhidrosis (106)
    Myalgia (106)
    Abdominal Pain (104)
    Tremor (101)
    Urticaria (100)
    Hypertension (99)
    Fall (93)
    Blood Pressure Increased (88)
    Constipation (88)
    Pulmonary Embolism (84)
    Thyroid Function Test Abnormal (83)
    Hypersensitivity (83)
    Oedema Peripheral (82)
    Product Quality Issue (82)
    Nervousness (77)
    Blood Thyroid Stimulating Hormone Decreased (76)
    Hypothyroidism (76)
    Blood Thyroid Stimulating Hormone Abnormal (74)
    Hypoaesthesia (73)
    Abdominal Distension (70)
    Paraesthesia (70)
    Pyrexia (67)

    ➢ More

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    Synthroid Forum

    Did You Have a Synthroid Side Effect?

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