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Thyroid-stimulating Hormone Suppression

Thyroid-stimulating hormone (TSH) suppression is a treatment strategy, mainly for selected differentiated thyroid cancers. It uses thyroid hormone to reduce growth stimulation of remaining thyroid cells, while balancing harms from hormone excess.

Medicine used to treat Thyroid-stimulating Hormone Suppression

Levothroid

Levothyroxine

25 · 50mcg

Levothyroxine 25mcg and 50mcg tablets, used in the management of hypothyroidism and thyroid-stimulating hormone suppression. Synthetic T4.

From$0.15/ tabletView

Key points

  • The TSH target is individual and may change with cancer response, recurrence risk, age, heart health and bone risk.
  • TSH and free thyroid-hormone tests guide dosing; symptoms alone cannot show whether suppression is adequate or excessive.
  • Excess suppression can contribute to atrial fibrillation, palpitations, bone loss, anxiety, tremor or sleep problems.

Catalogue matches do not set a TSH target or indicate a safe levothyroxine dose.

Who may need suppression?

Benefit is greater for some higher-risk or persistent differentiated thyroid cancers than for low-risk disease with an excellent response. The oncology and endocrine team reviews pathology, imaging and tumour markers over time.

How is levothyroxine used safely?

Levothyroxine replaces thyroid hormone and, at a sufficient dose, lowers pituitary TSH. Absorption, other medicines, pregnancy and adherence affect results. Monitoring under thyroid health care prevents a fixed historical target continuing after risk changes.

When to seek urgent care

Seek urgent care for chest pain, fainting, severe breathlessness, a sustained rapid or irregular heartbeat, confusion or marked weakness during suppressive therapy.

Further reading

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