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Thyroid Health iconThyroid Health

Synthroid and Cytomel replace thyroid hormone for hypothyroidism, while Neomercazole and Tapazole reduce hormone production for hyperthyroidism, the two opposite thyroid conditions this range covers.

Synthroid

Levothyroxine

25mcg · 50mcg · 75mcg · 100mcg · 125mcg · 150mcg · 200mcg

Levothyroxine tablets for hypothyroidism. They replace the thyroid hormone that your own thyroid is not producing.

From$0.13/ tabletView

Cytomel

Liothyronine

5mcg

Liothyronine tablets for hypothyroidism and myxoedema coma. It is a synthetic form of the active thyroid hormone T3, acting directly without conversion.

From$1.07/ tabletView

Neomercazole

Carbimazole

5mg · 10mg

Carbimazole tablets for an overactive thyroid. It slows the production of thyroid hormone.

From$0.57/ tabletView

Tapazole

Thiamazole

5mg

Thiamazole tablets for an overactive thyroid. It reduces thyroid hormone production.

From$0.78/ tabletView

Key points

  • Hypothyroidism means the thyroid makes too little hormone, while hyperthyroidism means it makes or releases too much.
  • Thyroid testing commonly measures TSH alongside T4, and sometimes T3 or thyroid antibodies too.
  • Levothyroxine is NICE’s first-line treatment for primary hypothyroidism, while antithyroid medicines form part of hyperthyroidism management.

Hormone replacement and antithyroid tablets

Levothyroxine is the T4 hormone in Synthroid, and liothyronine is the T3 hormone in Cytomel; each is listed for hypothyroidism, and Cytomel is also listed for myxoedema coma. Carbimazole is the antithyroid ingredient in Neomercazole, and Tapazole contains thiamazole, a related antithyroid ingredient; both are listed for hyperthyroidism.

Further reading