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Thyroid HealthThyroid Health

Thyroid medicines either replace missing hormone or reduce excess hormone production. Diagnosis and dose adjustments are guided by symptoms and blood tests.

Medicines in the Thyroid Health category

NeoMercazole

Carbimazole

5 · 10mg

Carbimazole 5mg and 10mg tablets, used in the management of hyperthyroidism. It blocks thyroid peroxidase, so T3 and T4 are not made.

From$0.21/ tabletView

Tapazole

Thiamazole

5 · 10mg

Thiamazole 5mg and 10mg tablets, used in the management of hyperthyroidism. A thionamide that blocks the enzyme thyroid peroxidase.

From$0.48/ tabletView

Cytomel

Liothyronine

20mcg

Cytomel is liothyronine 20mcg tablets for hypothyroidism, supplying the T3 thyroid hormone rather than the more usual T4 replacement.

From$0.94/ tabletView

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

  • Levothyroxine is replacement treatment for an underactive thyroid; liothyronine has a more limited, specialist-directed role.
  • Carbimazole and thiamazole reduce thyroid hormone production and require monitoring for uncommon but serious adverse effects.
  • Switching product, changing dose or stopping treatment without review can destabilise thyroid control.

Select a listed product and pack to order online. Whether it suits you depends on blood-test results; ask your doctor or pharmacist.

How the medicine groups differ

Thyroid replacement includes levothyroxine and, in selected cases, liothyronine. Antithyroid medicines include carbimazole and thiamazole. Replacement and antithyroid medicines treat opposite hormone problems and are not substitutes for one another.

What these medicines are used for

Replacement medicines are used for hypothyroidism. Antithyroid medicines may be used for hyperthyroidism as part of a clinician-led plan.

Important safety checks

Tell the clinician about pregnancy or plans for pregnancy, heart disease and all medicines or supplements. Iron, calcium and some other products can affect thyroid hormone absorption. Blood tests are needed after relevant treatment changes; symptoms alone cannot confirm the correct dose.

When to seek urgent care

While taking an antithyroid medicine, fever, sore throat or mouth ulcers require urgent medical advice and a blood-count check. Seek emergency help for chest pain, severe breathlessness, fainting, marked confusion, a very fast or irregular heartbeat, or a serious allergic reaction.

Further reading

FAQ

Which thyroid medicines can I order on SGMeds?

There are 4 thyroid medicines on SGMeds, containing 4 different active ingredients such as carbimazole, thiamazole and liothyronine. They include NeoMercazole and Tapazole, and the full list is on this page.

Which medicines for an underactive thyroid can I order?

Medicines for hypothyroidism on SGMeds include Levothroid (levothyroxine) and Cytomel (liothyronine).

Which conditions are these thyroid medicines for?

The thyroid medicines listed here are used for hyperthyroidism and hypothyroidism, though not every medicine is used for both.

What form do thyroid medicines come in?

All of them are tablets. Each product page lists the medicine's strengths.

How do I choose between the thyroid medicines on SGMeds?

Compare the active ingredient first: products with the same active ingredient contain the same medicine. Then compare strength, form and price per tablet. Each product page sets out what the medicine is used for, its side effects and its interactions. Check with a doctor or pharmacist first if you take other medicines, are pregnant or have a long-term condition.

Are the thyroid medicines on SGMeds generics?

Yes. Even when a product is listed under a brand name, you receive a generic or branded generic with the same active ingredient at the strength you choose, not the original brand's pack. Brand names such as Levothroid and NeoMercazole are there so you can find the medicine. The manufacturer varies with stock.

What you will receive →

How much do thyroid medicines cost in Singapore?

Every strength and pack size is priced on its product page, shown in Singapore dollars. The prices are converted from US dollars, so the exchange rate can change the final amount. Larger packs usually cost less per tablet.

Payment and prices →

Can I buy thyroid medicines over the counter in Singapore?

Yes, online: SGMeds does not ask for a prescription when you order thyroid medicines. We place the order with our pharmacy partner, which prepares it and arranges delivery on your behalf.

Ordering without a prescription →

Where can I buy thyroid medicines online in Singapore?

You can order them here on SGMeds. Choose the medicine on this page, then its strength and pack, and check out. Parcels to Singapore and Malaysia go by Express shipping (tracked, up to 1 week) or Regular shipping (up to 3 weeks).

How ordering works →

Last updated

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