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Hypothyroidism (Under active Thyroid) & Hashimoto's Disease

Hypothyroidism (Under active Thyroid) is more common in women than men, with estimates that 10 times more women than men are affected. Hypothyroidism is usually gradually progressive with symptoms increasing as thyroid function deteriorates.

Hashimoto’s Disease – Thyroid Auto-immune Disease, usually causes hypothyroid symptoms, however it is possible for Hashimoto symptoms to swing between hypothyroidism and hyperthyroidism. Treatment for hypothyroidism is Levothyroxine replacement therapy.

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Hyperthyroidism, Graves' Disease & Thyroid Eye Disease

Hyperthyroidism, or Graves’ Disease, is the most common cause of hyperthyroidism. It is triggered by the immune system producing antibodies that stimulate the thyroid gland to increase the size of the gland and produce excessive amounts of thyroid hormone.

Treatment for hypothyroidism is thyroid hormone replacement, with synthetic Levothyroxine. Brands in Australia are Oroxine (Original) Eutroxsig (Generic) both of these brands need to be refrigerated at all times. Eltroxin (Original) does not need to be refrigerated. Eltroxin has 10% less active ingredient than both Oroxine and Eutroxsig. Therefore, if you change brands to Eltroxin, dose adjustment, may be necessary and regular thyroid function testing. Eltroxin is not available on PBS. Choice of brand is individual and should be decided with your thyroid treating doctor. All brands are made by Aspen Pharmaceuticals. It is not recommended to interchange brands or take two different brands to complete a daily dose requirement. 

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Thyroid Cancer

Thyroid Cancer develops when thyroid cells divide in an abnormal way into one of the four types of thyroid cancer – Papillary, Follicular, Medullary and Anaplastic.

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Congenital Hyperthyroidism

Congenital Hypothyroidism usually results when a baby is born without a thyroid gland, but there are many other causes of this disorder.

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Thyroid Nodules

Thyroid Nodules are lumps in the Thyroid Gland.  In most cases nodules will be benign. However 1 in 10 may be malignant (cancerous). Nodules may be either a “Single Nodule” or in clusters, often referred to as “Multi-Nodular Goitre".

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Iodine Deficiency

Iodine Deficiency is the commonest worldwide cause of thyroid disorders.  A low iodine diet can cause hypothyroidism, an enlarged thyroid gland (goitre) and can affect fertility.

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Parathyroid Gland

Exposure to Radiation at a young age from dental x-rays, other forms of x-rays are the main causes in Australia of radiation exposure which can affect the function of the thyroid gland.  

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Exposure to Radiation

Exposure to Radiation at a young age from dental x-rays, other forms of x-rays are the main causes in Australia of radiation exposure which can affect the function of the thyroid gland.

Thyroid & Pregnancy

The ATF recommend all women of childbearing age should be aware of their thyroid function levels, family thyroid history and daily iodine intake, Thyroid function and auto-immune disease testing is recommended to rule out a thyroid disorder during this life stage.

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Tel: +61 (0) 447 834 724

Email: info@thyroidfoundation.org.au

Mailing Address:

PO Box 36

Narellan NSW 2150



The mission of The Australian Thyroid Foundation Ltd (ATF) is to offer support, information and education to members and their families through the many services provided by The ATF and raise awareness about health consequences of iodine deficiency and the benefits of good thyroid health.

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