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March 27, 2023 9 min read

If you're like us, you're always on the lookout for new and exciting treatment options that can help alleviate the symptoms of hypothyroidism. And today, we want to talk about a product that has been generating some buzz in the thyroid community: Thyroid-S from Thailand!

Now, we know what you're thinking - Thailand? That's right, this little gem comes all the way from the Land of Smiles, and it's been gaining popularity among those who prefer natural desiccated thyroid (NDT) over the more commonly prescribed levothyroxine. So, if you've been curious about this medication, keep reading to learn more about it!

What is Thyroid-S?

Thyroid-S is a natural desiccated thyroid brand that is manufactured by Sriprasit Pharma Co., Ltd, a reputable pharmaceutical importer, distributor, and manufacturer that is based in Thailand. This company is certified by GMP and ISO 9002, and it has a long-standing reputation for quality.

Made from dried and crushed natural thyroid glands of pigs (Thyroid extract USP), Thyroid-S contains the full spectrum of hormones that the human thyroid gland naturally produces: T1, T2, T3, T4, and Calcitonin.

Other than the active ingredient, Thyroid-S also contains fillers, binders, and preservatives known as inactive ingredients. The full list of ingredients isn't disclosed by the company. However, there are reports that the inactive ingredients include corn starch, Avicel (microcrystalline cellulose), PVP K-90 (Polyvinylpyrrolidone), aerosil, magnesium stearate, sodium starch glycolate, methocel, talc, red coloring, yellow coloring, aluminum, titanium dioxide, PEG 6000, and dimethicone.

Thyroid-S comes in 500-tablet bottles. Each tablet is 60 mg (1 grain) and contains 38 mcg of thyroxine (T4) and 9 mcg of triiodothyronine (T3). The tablets are light brown, round, and have a hard crust. They are chewable and have a sweet taste, similar to papaya or fruit.

Thyroid-S has become increasingly popular among individuals seeking a natural alternative to synthetic thyroid medications. It's the last remaining natural desiccated thyroid product available from Thailand, as other brands, like Thiroyd by Greater Pharma Manufacturing, are no longer available.

What is Thyroid-S used for?

A woman closing her eyes because she has a headache and fatigue due to hypothyroidism

Thyroid-S is designed to provide thyroid support for individuals with hypothyroidism, a condition in which the thyroid gland doesn't produce enough thyroid hormone for the body to function properly. This can lead to a wide range of symptoms, including fatigue, weight gain, brain fog, cold intolerance, and joint pain.

It's an alternative option to the standard treatment of hypothyroidism: synthetic T4 medication known as levothyroxine.

Since there's no cure for hypothyroidism, Thyroid-S serves as a lifelong thyroid support.

What are the benefits and potential drawbacks of using Thyroid-S for hypothyroidism treatment?


Like all types of thyroid hormone replacement, one of the key benefits of using Thyroid-S is the relief of hypothyroidism symptoms. Additionally, many people report improved sleep quality and relief from body cramps after taking Thyroid-S tablets.

Unlike levothyroxine, which only contains synthetic T4, Thyroid-S provides the body with the exact same hormones that are naturally produced by the thyroid gland. As a result, it can be an effective treatment for those with hypothyroidism who don't experience any improvements with levothyroxine. And since Thyroid-S contains the natural thyroid gland of pigs, it's a great option for those looking for a more natural approach to hormone replacement.


However, it's important to note that Thyroid-S may not be suitable for everyone. Sriprasit Pharma, the manufacturing company, does not provide a complete list of ingredients, leading some to worry about potential allergens and fillers such as lactose and gluten. In fact, there have been reports of side effects related to intolerance to these substances.

It's also worth noting that not everyone experiences positive results with Thyroid-S. Some people report that even after increasing the dosage, they did not see an improvement in their symptoms, while others find the high price and long shipping times when they buy Thyroid-S online to be a potential drawback. The thyroid support also requires a prescription even though it's not technically registered as medication.

How much Thyroid-S should you take daily?

Getting the right dose of Thyroid-S is crucial to managing hypothyroidism effectively. Your doctor will recommend the starting dose, which is usually 30 mg. It can be increased by 15 mg every 2 to 3 weeks based on your blood levels of T3 and T4. The maximum daily dosage is 250 mg per day, but be sure to talk to your doctor and don't increase the dosage on your own.

Remember, it may take several weeks to see normal thyroid hormone levels in your blood after starting Thyroid-S treatment. But with regular use of Thyroid-S, you should start feeling better and seeing positive results soon enough.

It's important to monitor your blood levels while taking Thyroid-S, so make sure to stay in touch with your doctor and get regular check-ups. And don't forget, once you start taking Thyroid-S, you may need to continue taking it for the rest of your life.

How should you take Thyroid-S?

Taking Thyroid-S correctly is important to ensure that the medication works effectively. Here are some tips on how to take Thyroid-S properly:

Take Thyroid-S on an empty stomach

It's important to take Thyroid-S on an empty stomach, preferably 30 minutes before a meal. This allows for better absorption of the medication into the bloodstream. Taking Thyroid-S with food, especially foods high in calcium, can interfere with the absorption of the medication.

Take Thyroid-S with water

When taking Thyroid-S, make sure to swallow the tablets whole with a full glass of water. This helps the medication dissolve in the stomach and be absorbed properly into the bloodstream.

Don't take Thyroid-S with other medications

Avoid taking Thyroid-S with other medications. Other medications can interfere with the absorption of Thyroid-S, making it less effective. In turn, you won't experience any relief from your symptoms. If you need to take other medications, talk to your doctor about the best way to space them out.

Don't skip doses

Make sure to take Thyroid-S regularly as prescribed by your doctor. If you miss a dose, take it as soon as you remember unless it is close to the time for your next dose. Never take a double dose to make up for a missed dose.

Store Thyroid-S properly

Keep your Thyroid-S tablets in the bottle until it is time to take one. Store in a cool, dry place away from light where the temperature stays below 25°C. Make sure to keep the medication out of reach of children.

By following these simple tips, you can ensure that you are taking Thyroid-S correctly and maximizing its effectiveness. If you have any questions or concerns about how to take Thyroid-S, talk to your doctor or pharmacist.

What are the potential drug interactions that should be considered while using Thyroid-S?

Thyroid-S can interact with many other drugs, leading to decreased absorption of thyroid medicine, limiting the conversion of T4 to T3, or interfering with thyroid function test results. Common drug interactions include

  • Medicines containing calcium carbonate, iron sulfate, aluminum, or magnesium should be taken at least 4 hours apart from Thyroid-S tablets to avoid reducing the effectiveness of the thyroid medication.

  • Bile acid sequestrants such as Colesevelam, Cholestyramine, and Colestipol should be taken at least 4 hours apart from Thyroid-S tablets because they may reduce the absorption of thyroid medication.

  • Proton pump inhibitors, or medications for stomach conditions, may decrease the absorption of Thyroid-S tablets.

  • Birth control pills or estrogen supplements can affect the movement of T4 and T3 in the blood.

  • Oral anticoagulants need to be reduced in dose when co-administered with the Thyroid-S tablet.

  • Insulin, or antidiabetic drugs, need to be increased in dose when co-administered with Thyroid-S therapy.

In fact, some drug interactions don't change your thyroid hormone levels, while others can cause unwanted side effects. Therefore, you should tell your doctor about all medications you are taking, including supplements and herbs.

What are the potential side effects of Thyroid-S?

Thyroid-S is generally well-tolerated, but like any medication, it can have side effects that you should be aware of. These side effects may occur as your doctor adjusts your dosage to find the right level for your body. While some symptoms may go away on their own once your dosage is adjusted, others may require medical attention. It's important to know about these potential side effects so you can manage them effectively.

Taking too much Thyroid-S can result in symptoms of hyperthyroidism or an overactive thyroid. These symptoms may include:

  • Excessive sweating

  • Hair loss

  • Anxiety

  • Shortness of breath

  • Shakiness

  • Rapid weight loss

  • Sleep disturbances

  • Rapid heart rate.

In some cases, taking too much Thyroid-S can result in serious complications like heart disease, stroke, infertility, and blood clotting. If you experience any of these, be sure to seek immediate medical attention.

On the other hand, taking too little Thyroid-S can exacerbate your hypothyroid condition. Common symptoms of this may include:

  • Sensitivity to cold

  • Dry skin

  • Hair loss

  • Constipation

  • Weight gain

  • Cramping

  • Depression.

It may also lead to serious complications, such as myxedema coma or a severe form of hypothyroidism that can potentially be dangerous.

In addition, you may experience allergic reactions if you are sensitive to any of the ingredients in Thyroid-S. These may include skin rash, itching, hives, swelling of the throat, tongue, lips, or face, severe dizziness, shortness of breath, and even seizures. Remember that everyone's experience is different, so it's important to tell your doctor immediately or seek emergency medical attention if you experience any of the side effects mentioned.

What are the precautions that should be taken while using Thyroid-S, and what are the contraindications for its use?

When taking Thyroid-S tablets by Sriprasit Pharma, it's essential to be aware of the precautions and contraindications to ensure your health and safety. Here's what you need to know:


  • Thyroid replacements like Thyroid-S tablets may worsen diabetes and increase the need for antidiabetic drugs. If you're taking Thyroid-S, work with your doctor to monitor your blood sugar levels carefully.

  • If you become pregnant while taking Thyroid-S, inform your doctor right away. Pregnancy may require a higher dosage of Thyroid-S.

  • Overtreatment of Thyroid-S may decrease bone mineral density, leading to osteoporosis, which is most common in postmenopausal women.

  • Over-treatment of Thyroid-S can affect cardiac contractility and heart rate, causing angina in the elderly or people with heart disease.

  • Oral thyroid replacements like Thyroid-S are not recommended for treating myxedema coma. Patients must take intravenous thyroid hormone supplements instead.

  • Do not suddenly stop taking Thyroid-S or any other thyroid medications without first consulting your doctor.


  • Thyroid-S tablets are contraindicated in patients with untreated adrenal insufficiency, myocarditis, acute myocardial infarction, active cardiac arrhythmias, thyrotoxicosis, or hyperthyroidism.

  • It's important to note that you should not take Thyroid-S or any other natural thyroid extract supplements as a support for weight loss and obesity treatment. While the thyroid hormone supplement helps boost metabolism in people with hypothyroidism and leads to weight loss, taking large amounts of Thyroid-S can cause symptoms of hyperthyroidism, which can be life-threatening.

  • This product is ineffective in treating male and female infertility, except for infertility caused by low thyroid.

By following these precautions and being aware of the contraindications, you can ensure the safe and effective use of Thyroid-S tablets. If you have any questions or concerns, don't hesitate to talk to your doctor.

What are the alternatives to Thyroid-S?

Thyroid-S has been a popular thyroid medication for many years, but due to supply issues and changes in effectiveness, many people are now seeking alternatives. If you're one of those people, don't worry - there are other options available.

One excellent alternative to Thyroid-S is VitaliThy, a natural desiccated thyroid you can buy online. Unlike Thyroid-S, VitaliThy fully discloses its ingredients. This NDT supplement doesn't contain common allergens like gluten, lactose, eggs, or fish. This means that individuals with specific food sensitivities or allergies can take the supplement without any concerns.

But that's not all that sets VitaliThy apart. In addition to natural thyroid extract (porcine thyroid gland), VitaliThy also includes essential minerals and herbs that can support thyroid health. For example, Ashwagandha has a long history of use in Ayurvedic medicine for improving thyroid hormone levels, while Selenium is essential for converting T4 to T3.

And if you're worried about Selenium affecting the absorption of your medication, you can rest easy. Each VitaliThy tablet contains just 6mcg of Selenium, which is unlikely to have a significant impact on the effectiveness of the medication.

Conclusion: Thyroid-S is the last remaining NDT from Thailand

As an effective natural thyroid hormone supplement, Thyroid-S has been a trusted choice for many people struggling with hypothyroidism. Its active ingredient, desiccated thyroid, is derived from porcine thyroid glands and has been used for decades to treat thyroid hormone deficiencies. Many people have reported improved energy levels, weight loss, and an overall improvement in their quality of life after taking Thyroid-S.

Thyroid-S is the last remaining NDT from Thailand. Despite the recent shortage of Thyroid-S due to a lack of raw materials, the manufacturer has resumed production with a new supplier, ensuring a steady supply of this trusted medication for those who rely on it. However, many people reported that it's no longer effective as it once was.

If you're looking for an alternative to Thyroid-S, VitaliThy from Vietnam is a great option. With its gluten- and lactose-free formula, as well as added minerals and herbs, VitaliThy may be just what you need to support your thyroid health. Plus, it's a great option for those looking to buy desiccated thyroid online with no prescription.

Wojciech Majda
Wojciech Majda

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