Published on Mar 30, 2025
Thyroid disorders are common conditions that affect how your body’s metabolism works. Many Australians live with either an underactive thyroid (hypothyroidism) or an overactive thyroid (hyperthyroidism). If you’ve been feeling unusually tired, noticed changes in your weight, or experienced things like heart palpitations, it’s worth understanding whether your thyroid could be the cause. In this article, we’ll break down what these thyroid conditions are, their symptoms and treatments, and how medications like levothyroxine (for underactive thyroid) or anti-thyroid drugs and radioactive iodine (for overactive thyroid) are used. We’ll also explain the importance of regular TSH testing (a simple blood test) and how to monitor your symptoms. Finally, since managing a chronic condition means regular prescriptions, we’ll discuss how Australians can conveniently manage their prescriptions online – for example, through telehealth services like NextClinic – to get their thyroid medication without hassle.
We’ll keep things clear, conversational, and jargon-free, defining any medical terms in simple language. By the end, you should have a solid understanding of hypothyroidism and hyperthyroidism, and feel empowered to manage your thyroid health – whether it’s knowing what symptoms to watch for or how to get your online prescriptions for thyroid medication. Let’s get started!
To understand these conditions, it helps to know a bit about the thyroid gland. The thyroid is a small, butterfly-shaped gland located in the front of your neck (just below the Adam’s apple). It produces thyroid hormones – mainly T4 (thyroxine) and a smaller amount of T3 (triiodothyronine) – which travel through your bloodstream and help regulate your metabolism. Metabolism is basically how your body uses energy; it affects many functions like your heart rate, body temperature, and how quickly you burn calories. In simple terms, think of thyroid hormones as the gas pedal for your body’s engine: the right amount keeps things running smoothly, but too little or too much can slow you down or rev you up too much.
The production of thyroid hormones is controlled by a hormone from your brain called TSH (Thyroid Stimulating Hormone). TSH is made by the pituitary gland and acts as a messenger, telling the thyroid to make more or less hormone. When thyroid levels are low, TSH rises to stimulate the thyroid; when thyroid levels are high, TSH drops. Doctors often check TSH levels in blood tests because it’s a key indicator of thyroid function. We’ll talk more about TSH tests later, but keep in mind that TSH is the main lab test used to diagnose and monitor thyroid problems.
Now, what happens when this system goes awry? Broadly, thyroid disorders come in two flavors:
Let’s dive into each of these, what causes them, how to recognize the symptoms, and how they’re treated.
Hypothyroidism occurs when the thyroid gland is underactive and not making enough thyroid hormone for the body’s needs. As a result, many of your body’s functions slow down. This is one of the most common thyroid disorders – in fact, hypothyroidism is the most common thyroid condition in Australia, affecting about 1 in 33 Australians (and more frequently in women, especially over 60).
The most common cause of hypothyroidism in Australia is an autoimmune condition called Hashimoto’s disease. In Hashimoto’s (also known as Hashimoto’s thyroiditis), the body’s immune system mistakenly attacks the thyroid gland, damaging it and reducing its ability to produce hormones. Other causes include iodine deficiency (rare in Australia these days due to iodised salt and diet), or treatments for other thyroid conditions – for example, if someone had surgery or radioactive iodine treatment for hyperthyroidism, they may end up hypothyroid afterwards. Some people are even born with an underactive thyroid (congenital hypothyroidism), which is why newborns are routinely screened at birth.
Because thyroid hormones affect the whole body, hypothyroidism can cause a wide range of symptoms. These symptoms tend to come on gradually and can be mild to moderate at first. Often, people might attribute them to aging or other issues because they develop slowly. Common symptoms of an underactive thyroid include:
Each person is different – you might have several of these symptoms or just a couple. Because these complaints (tiredness, weight gain, etc.) can overlap with other conditions, many people have an underactive thyroid for some time before it’s diagnosed. If you notice several of these symptoms persisting, it’s worth seeing a doctor for a check-up.
Diagnosing hypothyroidism is usually straightforward with a blood test. Your doctor will ask about your symptoms and health history and may also examine your neck (to feel if the thyroid is enlarged or has any lumps). The key test is to measure the levels of TSH and thyroid hormones in your blood:
It’s also common for the doctor to check for thyroid antibodies in your blood to see if Hashimoto’s disease is the cause. This can help confirm an autoimmune thyroiditis.
The good news is that once hypothyroidism is identified, it’s quite treatable with medication. The treatment is simple, and we’ll discuss that next.
The standard and most effective treatment for hypothyroidism is to replace the missing thyroid hormone. This is done with a daily medication called levothyroxine (also simply known as thyroxine). Levothyroxine is a synthetic form of the T4 hormone that your thyroid normally makes. Essentially, you’ll be taking what your thyroid cannot produce enough of, which brings your hormone levels back to normal.
Here’s what to know about levothyroxine treatment:
In Australia, levothyroxine is commonly available under brand names like Oroxine or Eutroxsig, but the active ingredient is the same. There is also a T3 medication (liothyronine) and combination therapies, but these are usually only considered by specialists in specific cases. Most people do very well on T4 alone. Notably, “natural” desiccated thyroid extract (made from pig thyroid glands) is not approved for use in Australia, due to concerns about consistency and safety. So, if you come across discussions about natural thyroid hormone, be aware that in Australia the recommended and regulated treatment is levothyroxine.
With proper treatment, the prognosis for hypothyroidism is excellent. The key is sticking with your daily medication and monitoring plan. Next, let’s switch gears to the opposite problem – hyperthyroidism, where the thyroid gland is overactive.
Hyperthyroidism is essentially the flip side of hypothyroidism. It occurs when the thyroid gland is overactive, producing too much thyroid hormone. As you might guess, this causes the body’s metabolism to speed up excessively. Hyperthyroidism is less common than hypo, but still affects a significant number of people. In Australia, it’s estimated that about 3 in 1000 people have hyperthyroidism. Like hypothyroid, it’s more common in women than men and often appears in adulthood (20s to 50s being a common age range, especially for the most frequent cause, Graves’ disease).
The most common cause of an overactive thyroid in Australia is Graves’ disease. Graves’ disease is an autoimmune condition (yes, the immune system again causing mischief) where the body produces antibodies that stimulate the thyroid to grow and secrete too much hormone. It essentially tricks the thyroid into overdrive. Graves’ can also cause eye symptoms (bulging or irritation, known as thyroid eye disease) in some patients. Other causes of hyperthyroidism include thyroid nodules (lumps in the thyroid that produce hormone independently) and thyroiditis, which is an inflammation of the thyroid that can leak thyroid hormone into the blood. Thyroiditis can happen after pregnancy or due to a viral infection, and is often temporary. Even taking too much iodine (for example, in certain supplements or medications) can, in rare cases, trigger an overactive thyroid if nodules are present. But by far, when we talk about chronic hyperthyroidism, Graves’ disease is a primary culprit.
If hypothyroidism is like running on a low battery, hyperthyroidism is like a car engine revving too high. An excess of thyroid hormones pushes your metabolism above normal, and this can affect virtually every system in the body. Symptoms can range from mild to quite severe. Common signs and symptoms of hyperthyroidism include:
Because these symptoms can develop gradually, it’s possible to overlook them initially. Some patients think it’s just stress or getting older. However, a combination of these signs – for example, losing weight, feeling anxious and sweaty, and having a racing heart – strongly suggests checking your thyroid. As always, a doctor will confirm with tests, since symptoms alone can sometimes mislead (other illnesses can mimic these feelings).
If hyperthyroidism is suspected, the evaluation is similar conceptually to hypothyroidism but we see the opposite lab pattern. The doctor will take your history (symptoms) and do a physical exam, looking for signs like a goitre, fast heart rate, tremor, or eye changes. Then, you’ll get blood tests for thyroid function:
Once diagnosed, further tests might be done based on the suspected cause (for example, imaging ultrasound if nodules are felt). But from the patient perspective, what matters next is treatment – how do we slow down the thyroid and get things back to normal? Hyperthyroidism has a few different treatment approaches, and we’ll explain each.
The goal in treating hyperthyroidism is to reduce the amount of thyroid hormone your body is making and alleviate the symptoms of an overactive metabolism. Treatment can be a bit more complex than hypothyroidism, because there are multiple options and the best choice can depend on the cause and patient factors like age or severity. The main treatment options for an overactive thyroid include:
Choosing a treatment is a personal decision and often depends on medical advice tailored to your situation. For example, a young woman with Graves’ disease might first try anti-thyroid medications to see if it goes into remission, whereas someone who doesn’t want to worry about relapse might opt for RAI for a more permanent fix. An older patient with heart issues might be steered towards RAI or surgery sooner to quickly control the thyroid. Your endocrinologist or GP will discuss the pros and cons of each approach in your context. All approaches aim for the same result: a normal thyroid level (often meaning you might become hypothyroid and need pills, which is okay).
No matter which treatment path, regular follow-up and blood tests are essential (just as with hypothyroidism) to ensure that the therapy is working and you’re not swinging too far in either direction. Hyperthyroidism treatment can sometimes feel like steering a rudder – initial frequent checks, then maintenance once on course. Now, let’s talk about monitoring in a bit more detail, since it applies to both conditions.
Whether you have an underactive or overactive thyroid, managing a thyroid disorder is not a “set and forget” situation. Regular monitoring is crucial to keep you in the healthy range. This typically involves periodic blood tests (for TSH and sometimes T4/T3 levels) and keeping track of how you feel.
For someone on thyroid hormone replacement (levothyroxine) for hypothyroidism, routine TSH blood tests are the main tool to ensure you’re on the right dose. After starting or changing a dose, doctors wait about 6–8 weeks and then test TSH to see if further adjustment is needed. Once your levels are stable, you’ll likely just do a TSH test once a year to make sure everything remains on track. If at any point you start feeling symptoms again (like fatigue, weight changes, etc.), or if you have a change in weight, or start a new medication that could interfere, your doctor might do an extra test. Remember, if levels are stable, testing TSH annually is usually sufficient – it’s a quick blood test that provides a lot of insight. According to Australian health guidelines, these thyroid function tests are used to check that your dose is right when you’re on replacement therapy.
For someone being treated for hyperthyroidism, testing might be more frequent initially. For example, on anti-thyroid meds, your doctor may check your thyroid levels every 4–6 weeks at first to guide dosing. After radioactive iodine, you might test at 6-week or 2-month intervals to see how things are changing. Over time, if you end up on a stable regimen (be it a low maintenance dose of medication or on levothyroxine after definitive treatment), then you move to less frequent checks (perhaps every 6-12 months).
Equally important as lab tests is listening to your body. Lab numbers guide treatment, but symptoms tell the real story of how you’re doing. Pay attention to changes like: energy levels, weight trend, heart rate, mood, and any return of previous symptoms. For instance, if you have hypothyroidism and notice you’re feeling more sluggish and cold again, let your doctor know – your dose might need tweaking. Conversely, if you start feeling jittery or have palpitations, your dose might be a bit too high. For hyperthyroid patients, if symptoms of fast heart rate or anxiety creep back during a course of treatment, it might mean a dose adjustment or different therapy is needed.
Doctors often encourage patients to keep track of how they feel. A nice piece of advice from endocrinologists is: learn the symptoms of both too little and too much thyroid hormone, so you can recognize them. By monitoring your symptoms and discussing any changes with your doctor, your medication can be adjusted in time to avoid you slipping into the opposite state. Essentially, you and your doctor become a team – the blood tests provide data, and you provide the subjective experience, and together that ensures optimal management.
In summary, regular TSH testing and check-ups are the backbone of thyroid management. These check-ups are quick and ensure you remain on the right dose. Skipping them can lead to under-treatment (leaving you feeling lousy) or over-treatment (which can strain your heart and bones, or flip you into the other thyroid state). The good news is that with today’s healthcare, it’s easier than ever to stay on top of these routine tests and prescriptions – even from the comfort of home, which brings us to our final topic: managing your thyroid medication prescriptions online.
Living with a thyroid condition means you’ll be interacting with the healthcare system regularly – getting blood tests, seeing your GP or specialist, and keeping up with your medication refills. This might sound like a lot of appointments, but Australia’s healthcare has evolved to make this much more convenient. In fact, getting prescriptions online and using telehealth services for follow-ups is now a popular and easy way to manage chronic conditions like hypothyroidism. Let’s explore how you can handle your thyroid scripts and check-ins without too much hassle.
1. Telehealth and Online GP Consultations: Australia has embraced telehealth, which means you can often consult with your doctor over the phone or a video call, rather than going into the clinic for every visit. If your thyroid condition is stable, a telehealth consultation is usually sufficient for a routine review and to renew your prescription. For example, instead of taking time off work to visit the GP just to say “I’m feeling fine, can I have my next 6 months of thyroxine?”, you could arrange a quick phone consult. Services like NextClinic allow you to request online prescriptions for your regular medications. After a short online questionnaire or consultation with an Australian-registered doctor, your prescription for levothyroxine or anti-thyroid medication can be approved and issued without you leaving home. This is extremely handy, especially for people in remote areas or those with busy schedules. NextClinic, for instance, sends the prescription as an electronic prescription (eScript) directly to your mobile as a secure token. You can then take that to any pharmacy. It’s a legit prescription, just in digital form.
2. Electronic Prescriptions (eScripts): Australia introduced electronic prescriptions in recent years, and they have quickly become common. Over 200 million electronic prescriptions have been issued since 2020, showing how widely adopted this is. If you haven’t used one: basically, instead of a paper script, your doctor sends you a SMS or email with a QR code or link, which is the “token” for your prescription. You show (or forward) that token to your pharmacist, and they scan it to dispense your meds. It’s secure and convenient – you can’t lose it (if you delete it, it can be re-sent), and it saves a trip to pick up a paper script. Most pharmacies are fully set up to handle eScripts now. You can even forward the SMS/email to your pharmacy for home delivery in some cases. For thyroid medication, which you’ll need long-term, your doctor can also issue repeats. If you have repeats, after each dispense the pharmacy will send you a new SMS for the next refill.
3. Online Prescription Services: Apart from your regular GP, there are dedicated online prescription services (like NextClinic and others) that focus on making repeat prescriptions easy. These services typically charge a small fee and have Australian-licensed doctors review your request. They might be useful if you can’t see your usual doctor on short notice or don’t have one. For thyroid conditions, since they are common and well-understood, getting a repeat script online is usually straightforward as long as you provide recent evidence of your diagnosis or treatment plan (some services might ask if you’ve had a TSH check recently or if you’ve been seen by a GP before for this condition). It’s essentially like a streamlined telehealth consult specifically to renew your medication. The doctor ensures it’s appropriate and then issues the script. This way, you request your prescription online and receive the eScript shortly after, often within an hour.
4. Safety and follow-up: You might wonder, is it safe to get prescriptions online? Yes – as long as you use reputable services. Australian telehealth platforms are regulated and require the same standards of care as in-person visits. They will typically only prescribe chronic medications like levothyroxine if it’s appropriate and there’s evidence it’s needed (they might ask for your previous GP’s details or a past prescription as proof). This is to prevent abuse and ensure patient safety. Always make sure any online service is Australian-based and uses AHPRA-registered doctors. The benefit is convenience, but it should complement regular healthcare, not completely replace seeing a doctor occasionally. You’ll still need to do your blood tests and have check-ins, but many of those check-ins can be via phone and your blood test results can be discussed remotely.
5. Practical tips for managing medication:
In summary, Australians have many options to manage prescriptions online, making life with a thyroid condition easier. Telehealth services (like NextClinic) are especially useful for obtaining ongoing scripts and advice without the inconvenience of frequent in-person visits. Always maintain a relationship with a GP or endocrinologist for the bigger picture of your health, but know that for the routine aspects – medication refills, general questions, minor symptom check-ins – online healthcare can save you time and keep you on track. By leveraging these tools, you ensure that managing your hypothyroidism or hyperthyroidism fits seamlessly into your life.
Q: What’s the difference between hypothyroidism and hyperthyroidism?
Hypothyroidism means an underactive thyroid (not enough hormone), causing a slow metabolism. Hyperthyroidism is an overactive thyroid (too much hormone) leading to an overactive metabolism. In short: hypo = “sluggish” thyroid, hyper = “overactive” thyroid.
Q: What are the common symptoms of an underactive thyroid?
Key symptoms of hypothyroidism include fatigue and low energy, unexplained weight gain, feeling cold, dry skin, hair loss, and often feeling down or depressed. You might also have muscle aches, constipation, and heavy periods. Symptoms are subtle at first and build up over time.
Q: What are the common symptoms of an overactive thyroid?
Hyperthyroidism symptoms are generally the opposite: anxiety or nervousness, racing heartbeat or palpitations, excessive sweating and heat intolerance, weight loss even if you’re eating normally, tremors (shaky hands), and feeling tired or weak despite being “amped up”. Some people also experience insomnia and, if Graves’ disease is present, eye changes like bulging eyes.
Q: How are thyroid problems diagnosed?
Primarily with blood tests. For hypothyroidism, a high TSH and low T4 confirms an underactive thyroid. For hyperthyroidism, a very low TSH and high T4/T3 indicates an overactive thyroid. Doctors also consider symptoms and may check for thyroid antibodies or do scans if needed. But a simple TSH blood test is often the first step to screen for thyroid issues.
Q: What is the treatment for hypothyroidism?
The treatment is thyroid hormone replacement. You take a daily tablet of levothyroxine (thyroxine) to replace the hormone your thyroid can’t make. This brings your levels back to normal. Treatment is usually lifelong and doses may need adjusting initially. With proper dosing, symptoms improve and you lead a normal life – just remember to take your pill each day and do regular blood tests to monitor TSH.
Q: What is the treatment for hyperthyroidism?
Treatment for hyperthyroidism can be one or a combination of: anti-thyroid medications (e.g. carbimazole) to reduce hormone production, radioactive iodine to permanently shrink or destroy overactive thyroid tissue, or surgery to remove the thyroid. All three aim to curb the excess hormones. Additionally, beta blocker drugs may be given to manage symptoms like rapid heart rate until the main treatment takes effect. The “best” treatment depends on the individual case – your doctor will guide you on the options.
Q: Why do I need regular TSH testing once I’m on medication?
Regular TSH blood tests are essential to ensure you’re on the correct dose of medication and that your thyroid levels remain balanced. Thyroid hormone needs can change over time, and things like dosage adjustments or different brands can affect levels. By checking TSH periodically (e.g. 6-8 weeks after a change, then yearly when stable), doctors make sure you’re not under- or over-treated. It’s the best way to fine-tune your treatment and keep you feeling your best. In short, TSH tests tell if your “engine” is running at the right speed and if we need to add more or less fuel.
Q: Can I get my thyroid medication prescription online in Australia?
Yes. Australia has telehealth services that allow you to obtain prescriptions online for medications like levothyroxine or Carbimazole. For example, through a service like NextClinic, you can request an online prescription by consulting a GP via phone or an online form. Once approved, you receive an electronic prescription (eScript) via SMS/email, which you can take to any pharmacy. This means you don’t always need an in-person visit just for a repeat script – it’s very convenient for chronic medications.
Q: Do I have to see an endocrinologist for thyroid issues or can my GP manage it?
Most thyroid conditions, especially hypothyroidism, are easily managed by a GP (general practitioner). They can order tests, prescribe medication, and do the monitoring. You might see an endocrinologist (hormone specialist) if your case is complex – for example, difficult-to-control hyperthyroidism, pregnancy with thyroid disease, or if considering surgery/RAI for hyperthyroid. But routine cases are commonly handled by GPs in Australia, often with an initial consultation with a specialist to guide the plan. Telehealth has also made specialist advice more accessible if needed (e.g., your GP could get an endocrinologist’s input via e-consult).
Q: What if I still feel unwell on thyroid medication?
If you’re on treatment (either thyroxine for hypo or anti-thyroid meds for hyper) and still not feeling right, you should discuss this with your doctor. Sometimes symptoms persist due to an inadequate dose or other factorshormones-australia.org.au. There might be another health issue contributing. Your doctor may adjust your dose, check if you’re taking the medication correctly (for thyroxine, absorption issues are common if not taken on empty stomach), or investigate other causes. In some cases, for hypothyroid patients who don’t feel better on T4 alone, an endocrinologist might consider combination therapy or evaluate for other conditions. The key is not to silently endure – fine-tuning treatment is part of the process, and your healthcare provider will want to know if you’re not feeling as good as expected.
This medical blog provides general information and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with your regular doctor for specific medical concerns. The content is based on the knowledge available at the time of publication and may change. While we strive for accuracy, we make no warranties regarding completeness or reliability. Use the information at your own risk. Links to other websites are provided for convenience and do not imply endorsement. The views expressed are those of the authors and not necessarily representative of any institutions.
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