Levothroid
Hypothyroidism
25 · 50mcg
Levothyroxine 25mcg and 50mcg tablets, used in the management of hypothyroidism and thyroid-stimulating hormone suppression. Synthetic T4.
From$0.15/ tabletView
Levothyroxine
Levothyroxine is synthetic thyroxine used to replace deficient thyroid hormone. Listed uses include Hypothyroidism.
Key points
- It has a narrow treatment target and should not be used for weight loss.
- Food, supplements and many medicines can alter absorption.
- Chest pain, fainting or a very fast irregular heartbeat needs urgent care.
Select a listed product and pack to order online. Ask your doctor or pharmacist whether it suits you and what monitoring it needs.
Important safety checks
Thyroid tests, heart disease, pregnancy, formulation consistency and interacting calcium, iron or other medicines require review.
When to seek urgent care
Seek urgent help for chest pain, fainting, severe breathlessness, confusion or a very fast or irregular heartbeat.
Further reading
What is levothyroxine used for?
Levothyroxine replaces thyroid hormone when your body does not make enough. It is used for an underactive thyroid (hypothyroidism) and to suppress thyroid-stimulating hormone.
How does levothyroxine work?
Levothyroxine is a synthetic form of the thyroid hormone thyroxine (T4). Your body converts it to triiodothyronine (T3) inside cells, helping to bring metabolism back to normal when your thyroid hormone is low.
What levothyroxine product does SGMeds list?
The levothyroxine product on SGMeds is Levothroid, and its page gives the strengths and pack sizes.
How long does levothyroxine take to work?
Levothyroxine can take 2 to 4 weeks to start working.
What are the side effects of levothyroxine?
Common side effects include palpitations, weight loss and tremor. Anxiety, a fast heartbeat and trouble sleeping can also happen. Chest pain or an irregular heartbeat needs urgent medical attention.
Can levothyroxine be taken with other medicines?
Calcium carbonate, iron supplements and antacids can interact with levothyroxine. Food, supplements and many medicines can alter absorption. Ask your doctor or pharmacist if you take any of these.
What brand names is levothyroxine sold under?
In other countries, levothyroxine is also sold as Eltroxin and Thyronorm. Brand names vary between countries, so compare products by their active ingredient.
How is levothyroxine priced?
The product on this page shows a price for each strength and pack size in Singapore dollars, converted from US dollars, so the exchange rate can change the final amount. Larger packs usually cost less per tablet.
Payment and prices →Do I need a prescription for levothyroxine in Singapore?
No. SGMeds does not ask for a prescription to order levothyroxine: 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 levothyroxine in Singapore?
You can order levothyroxine here on SGMeds: choose the product, strength and pack, then check out. Parcels go to Singapore and Malaysia by Express shipping (tracked, up to 1 week) or Regular shipping (up to 3 weeks).
How ordering works →Related articles
22 Sept 2026 ⋅ 6 min read
Levothyroxine Timing: Calcium, Iron, Coffee and Breakfast
Why a consistent levothyroxine routine matters and how calcium, iron, magnesium, dairy, antacids and breakfast can affect absorption.
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