Summary
- The right thyroid treatment depends on the diagnosis, severity, age, pregnancy plans and other health conditions, as assessed by an endocrinologist.
- Untreated hyperthyroidism can lead to complications such as atrial fibrillation, heart failure and osteoporosis, and rarely, thyroid storm.
- Treatment may involve medication, radioactive iodine therapy (RAI) or surgery, depending on the condition.
- Hypothyroidism is commonly managed with levothyroxine. Hyperthyroidism may be treated with antithyroid medication, RAI or surgery, depending on its cause.
- Surgery may also be considered for certain large goitres or thyroid nodules after further assessment.
Being diagnosed with a thyroid condition can feel overwhelming, but thyroid disorders are among the most treatable in medicine. Whether you have an underactive thyroid, an overactive thyroid, or a nodule that needs attention, help is available, and most people manage it well.
Singapore offers a full range of treatment options, from daily medication to radioactive iodine therapy to surgery. The right path depends on your specific diagnosis, the severity of your condition, your age, and your personal preferences.
This guide walks through the main thyroid treatment options available in Singapore, what each involves, and how to work with your specialist to decide what’s right for you.
Understanding thyroid conditions that need treatment
Hypothyroidism (underactive thyroid)
Hypothyroidism occurs when the thyroid does not make enough hormones. It may result from Hashimoto’s disease, previous thyroid surgery or radioactive iodine treatment. Symptoms such as fatigue, feeling cold, dry skin and weight gain often develop gradually. Treatment focuses on replacing the hormone the body lacks.
Hyperthyroidism (overactive thyroid)
Hyperthyroidism occurs when there is too much thyroid hormone in the body. Causes include Graves’ disease, overactive thyroid nodules and thyroiditis. Symptoms may include a fast heartbeat, weight loss, tremor and heat intolerance. Identifying the cause matters because it determines which treatments will help.
Thyroid nodules and goitre
A thyroid nodule is a lump within the gland, while a goitre is an enlarged thyroid. Most nodules are benign and cause no symptoms, but some produce excess hormone, require assessment for cancer, or grow large enough to affect swallowing or breathing. Ultrasound, and sometimes a fine needle biopsy, helps guide whether a nodule should be monitored or treated.
Medication for thyroid conditions
Medication plays different roles depending on the condition: it can replace missing thyroid hormone, reduce excess hormone production, or control symptoms while another treatment takes effect.
Levothyroxine for hypothyroidism
Levothyroxine is a synthetic form of thyroid hormone that replaces what the gland isn’t producing. It’s taken once daily, usually on an empty stomach, and dosing is adjusted using follow-up blood tests. Symptoms often improve as hormone levels return to the appropriate range, although the time needed varies between patients.
Antithyroid medications for hyperthyroidism
For hyperthyroidism caused by an overactive thyroid gland medications such as carbimazole or propylthiouracil work by reducing the amount of hormone production. They are commonly used for Graves’ disease, where a course of treatment may lead to remission. Their role differs for other causes of excess thyroid hormone. Beta-blockers may also be prescribed temporarily to relieve symptoms such as a racing heart while thyroid hormone levels are brought under control.
How long medication treatment typically lasts
For hypothyroidism, levothyroxine is usually a long-term treatment when the thyroid cannot recover normal hormone production. For Grave’s disease, antithyroid medication is commonly given for around 12 to 18 months before the need for ongoing treatment is reasessed. If hyperthyroidism persists or returns, RAI or surgery may be discussed, depending on tis cause and the patient’s circumstances.
Radioactive iodine therapy (RAI)
RAI is an option for certain causes of hyperthyroidism, including Graves’ disease and overactive thyroid nodules. It may be considered when medication is unsuitable, causes side effects, or does not provide lasting control.
How RAI works and who it is suitable for
RAI involves swallowing a capsule or liquid containing radioactive iodine. The thyroid absorbs iodine to make its hormones, so it takes up the radioactive iodine too. This gradually destroys the overactive thyroid cells, reducing hormone production over several weeks to months. It’s commonly recommended for Graves’ disease, toxic nodular goitre (an enlarged thyroid with overactive nodules), and toxic adenomas (single overactive nodules), especially when medication hasn’t controlled the condition or has caused side effects. RAI is not suitable during pregnancy or breastfeeding.
What to expect during and after RAI treatment
The treatment itself is usually given as an outpatient dose, although some people may need further treatment. Afterwards, patients are usually advised to limit close contact with others, particularly pregnant women and young children for a short period. The duration of these precautions depends on the dose and the doctor’s advice. Some mild neck tenderness or a temporary worsening of symptoms can occur as the thyroid cells break down, but serious side effects are uncommon.
Long-term effects and follow-up care
The most common side effect of RAI is hypothyroidism (an underactive thyroid), since the treatment often reduces thyroid function below normal over time. This isn’t a complication to worry about, it’s actually an expected result of treatment, and it could be managed effectively with a daily hormone tablet (levothyroxine). Regular thyroid blood tests in the months and years after RAI help catch this early so your medication can be adjusted accordingly.
Thyroid surgery (thyroidectomy)
Surgery remains an important option, particularly for structural problems or when other treatments aren’t appropriate.
When surgery is recommended over medication or RAI
Thyroidectomy may be considered for a goitre causing swallowing or breathing difficulties, a nodule that requires surgical management, or selected cases of hyperthyroidism. For Graves’ disease, factors such as significant thyroid eye disease and a patient’s treatment preferences may also influence the discussion. The reason for surgery should be clear before deciding how much of the gland to remove.
Partial vs total thyroidectomy
The thyroid has two sides, called lobes. A partial (or hemi-) thyroidectomy removes only the affected lobe. It may be appropriate for certain nodules confined to one side. Some patients make enough hormone with the remaining lobe, while others need levothyroxine.
A total thyroidectomy removes the whole gland. This is usually recommended for thyroid cancer, a large goitre affecting both sides, or Graves’ disease when surgery is the chosen treatment. After a total thyroidectomy, you will need to take levothyroxine (thyroid hormone tablets) for life.
How to choose the right treatment path
There is no single “right” or “correct” treatment for every thyroid condition. Two patients with the same diagnosis might end up on different treatment paths.
Your specialist will consider the diagnosis, test results, symptoms, age, pregnancy plans, other health conditions and response to previous treatment. For a thyroid nodule, its ultrasound features and biopsy results may also guide the decision. Your preferences matter, including how you feel about ongoing medication, RAI or surgery.
Questions to ask your thyroid specialist
- What exactly is causing my thyroid condition?
- What are the realistic outcomes and risks of each treatment option in my case?
- How will treatment affect my ability to have children, if relevant?
- What follow-up testing will I need, and how often?
- What happens if this treatment doesn’t fully resolve my condition?
Bringing a written list of questions to your appointment can help you discuss the options most relevant to your diagnosis.
Frequently asked questions
Can thyroid conditions be treated without surgery?
Will I need medication for life after thyroid treatment?
How long does it take for thyroid treatment to work?
What happens if hyperthyroidism is left untreated?
Speak to a thyroid specialist at Harmony Endocrine
Every thyroid condition is different, and the best treatment plan is one built around your specific diagnosis, health goals, and lifestyle. Dr Vikram and the team at Harmony Endocrine work with patients through every stage of thyroid care, from initial diagnosis and medication management to coordinating RAI or surgical referrals when needed.
If you’ve been diagnosed with a thyroid condition, or suspect something may be off, book a consultation with Harmony Endocrine to discuss the treatment options best suited to you.