Lethyrox 25 Tablet
By Lethyrox
Rx
100 Tablet in a Bottle

Composition
Thyroxine(25mcg)

Manufacturer - Intas Pharmaceuticals Ltd
Chinubhai Centre, Off. Nehru Bridge, Ashram Road, Ahmedabad - 380009. Gujarat. India.

Expires on or after
January, 2026
About Lethyrox 25 Tablet
Lethyrox 25 Tablet is a medication used to treat hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormone. This tablet contains Levothyroxine, a synthetic hormone that replaces the missing natural thyroid hormones in the body. By regulating the body's energy and metabolism, Lethyrox 25 Tablet helps alleviate symptoms such as weight gain, fatigue, and sensitivity to the cold associated with low thyroid hormone levels.
Before starting Lethyrox 25 Tablet, your doctor will conduct a blood test to determine the appropriate dose. It is essential to take this medicine on an empty stomach before your first meal of the day. Regular blood tests will be necessary to monitor its effectiveness, and the dosage may need adjustment over time. It may take a few weeks for symptoms to improve, and long-term use may be required.
Common side effects of Lethyrox 25 Tablet may occur when taking a higher dose than needed and include palpitations, anxiety, diarrhea, weight loss, and tremors. Most side effects usually subside once the correct dosage is established. However, severe side effects such as high fever, irregular heart rate, or confusion should be reported to your doctor immediately. If you become pregnant while taking this medicine, your doctor should be informed as the dosage may need to be adjusted. It is crucial to consult your doctor if you are taking any other medications as they may interact with Lethyrox 25 Tablet.
Women with diabetes who take Lethyrox 25 Tablet may experience changes in blood glucose control, requiring increased antidiabetic medication or insulin. Therefore, careful monitoring of blood glucose levels is recommended when starting, changing, or discontinuing thyroid hormone therapy. Additionally, calcium or vitamin D supplements may be prescribed alongside Lethyrox 25 Tablet to support bone health.
Lethyrox 25 Tablet is contraindicated in individuals with untreated hyperthyroidism, adrenal or pituitary insufficiency, and should be used cautiously in patients with coronary heart disease. While it can be safely used during pregnancy and breastfeeding, dosage adjustments may be needed. Common side effects of Lethyrox 25 Tablet include changes in appetite, weight, headaches, and digestive issues. If these side effects worsen, it is advisable to consult your doctor for further guidance.
Benefits
Lethyrox 25 Tablet is a beneficial medication used in the treatment of hypothyroidism, a condition where your body does not produce enough thyroxine, a vital hormone. This synthetic version of thyroxine helps to elevate hormone levels to the appropriate amount, addressing symptoms such as tiredness, weight gain, and muscle aches commonly associated with hypothyroidism. By restoring the hormonal balance in the body, Lethyrox 25 Tablet helps individuals alleviate these discomforting symptoms and improve their overall well-being.
It is crucial to note that for many individuals, Lethyrox 25 Tablet is a lifelong medication that should not be stopped without consulting a doctor. The medication's effectiveness may take some time to manifest fully, so it is important to be patient and continue with the prescribed treatment regimen. Regular blood tests may be recommended by your doctor to monitor the medication's effectiveness and ensure you are on the correct dosage. By following your doctor's advice and staying consistent with your treatment plan, you can experience the full benefits of Lethyrox 25 Tablet in managing hypothyroidism effectively.
How to use the Lethyrox 25 Tablet
To use Lethyrox 25 Tablet, follow your doctor's instructions on the dosage and duration. Swallow the tablet whole and do not chew, crush, or break it. It should be taken on an empty stomach. Make sure to take the medication as prescribed by your doctor for the best results. If you have any questions or concerns about how to use Lethyrox 25 Tablet, consult your healthcare provider for further guidance.
Uses of Lethyrox 25 Tablet
Lethyrox 25 Tablet is commonly prescribed for the treatment of hypothyroidism. This medication is specifically designed to address the condition where the thyroid gland is not producing sufficient hormones. By taking Lethyrox 25 Tablet as directed by a healthcare provider, individuals with hypothyroidism can effectively regulate their hormone levels and improve their overall health. It is important to follow the prescribed dosage and instructions while using Lethyrox 25 Tablet to ensure optimal effectiveness in managing hypothyroidism.
What conditions Lethyrox 25 Tablet treats?
Lethyrox 25 Tablet is used to treat underactive thyroid gland (hypothyroidism) by replacing the hormone that is lacking. It helps regulate energy and metabolism in your body. Initial blood tests determine the required dose, which may need adjustment over time. Take it on an empty stomach before your first meal daily for best results. Consistent use is crucial, as it may take weeks to see improvement. Discontinuing may cause symptoms to return. Common side effects like palpitations, anxiety, or weight loss usually fade once the right dose is established. Contact your doctor immediately for severe symptoms like high temperature or irregular heart rate.
Should you consult a doctor?
If you experience severe symptoms such as a very high temperature, fast or irregular heart rate, low blood pressure, yellowness in the eye/skin, confusion, or fits while taking Lethyrox 25 Tablet, it is important to seek immediate medical attention. These could indicate a serious reaction to the medication. Additionally, if you are pregnant or planning to become pregnant, inform your doctor promptly as the dose may need to be adjusted for your safety and that of your baby. It is crucial to consult your doctor if you are taking other medications alongside Lethyrox 25 Tablet, as interactions could occur. Remember to have regular blood tests to monitor the effectiveness of the medication and to adjust the dosage if needed, under the guidance of your healthcare provider. Always follow your doctor’s advice when taking Lethyrox 25 Tablet to ensure optimal treatment outcomes and to manage any potential side effects effectively.
Side effects of Lethyrox 25 Tablet
When taking Lethyrox 25 Tablet, you may experience certain side effects. Most side effects are temporary and usually improve as your body gets used to the medication. It's important to consult your doctor if any side effects persist or if you have concerns about them. Some of the side effects that you may encounter while using Lethyrox 25 Tablet include palpitations, which is a fast or irregular heartbeat, vomiting, feelings of anxiety, diarrhea, weight loss, nervousness, increased appetite, and tremors. These side effects are important to be aware of, but not everyone will experience them. If you notice any of these side effects, speak to your healthcare provider for guidance and support.
Safety advice

liver
There is limited information available about using Lethyrox 25 Tablet in patients with liver disease. It is important to consult your doctor for proper guidance regarding its safety in such cases.

kidney
Limited information exists on the use of Lethyrox 25 Tablet in patients with kidney disease. Consult your doctor before use.

alcohol
It is safe to consume alcohol with Lethyrox 25 Tablet.

driving
When taking Lethyrox 25 Tablet, it typically does not impact your driving ability.

pregnancy
Lethyrox 25 Tablet is considered safe to use during pregnancy based on studies showing little to no risk to the baby’s development.

breastfeeding
Lethyrox 25 Tablet is considered safe for use during breastfeeding. Studies indicate that the medication does not pass into breastmilk in harmful amounts, posing no risk to the baby.
Consumption warning before consuming Lethyrox 25 Tablet
Before consuming Lethyrox 25 Tablet, it’s crucial to follow your doctor’s guidance. A blood test will determine your required dosage. Regular blood tests will monitor its effectiveness, with dosage adjustments possible. Take it on an empty stomach before your first meal. Consistent usage is essential for optimal results, though improvement may take weeks. Discontinuation may lead to symptom recurrence. Side effects may occur with an excessive dose, such as palpitations, vomiting, and anxiety, which typically diminish with proper dosage. Seek immediate medical help if experiencing severe symptoms like high temperature or confusion. While weight loss may result, it’s not intended for obesity treatment. Inform your doctor promptly if pregnancy occurs, as dosage adjustments may be needed. Consult your doctor about interactions with other medications before use.
What if you forgot to take Lethyrox 25 Tablet?
If you forget to take a dose of Lethyrox 25 Tablet, try to take it as soon as you remember. But if it's close to the time for your next scheduled dose, just skip the missed dose and continue with your usual dosing routine. It's important not to take a double dose to make up for the missed one.
Related lab tests
Related Lab Tests for monitoring the effectiveness and safety of Lethyrox 25 Tablet include Anti Thyroglobulin Antibody test, Thyroid Function Test, Thyroid Profile Free test, and Thyroid Stimulating Hormone test. The Anti Thyroglobulin Antibody test helps to detect autoimmune thyroid diseases. The Thyroid Function Test measures the levels of thyroid hormones and can help in evaluating thyroid function. The Thyroid Profile Free test provides a detailed analysis of various thyroid hormones in the blood. Lastly, the Thyroid Stimulating Hormone test is used to assess the function of the pituitary gland in controlling thyroid hormone production. These lab tests play a crucial role in monitoring thyroid health and ensuring the effectiveness of Lethyrox 25 Tablet.
Additional Information
Habit Forming | No |
Chemical Class | Iodinated amino acid derivative |
Therapeutic Class | HORMONES |
Action Class | Thyroid hormones |
FAQs
Disclaimer
The information provided on this website is to the best of our abilities to ensure it is accurate, reliable, and reviewed by a team of professionals. It should not be used to diagnose, prevent, or cure any health problem. The information presented here is not intended to create a doctor-patient relationship or replace a registered medical practitioner's advice, diagnosis, or treatment. The absence or provision of any information or warning regarding any medicine should not be assumed as an implied or explicit assurance of safety or efficacy. We highly recommend consulting your registered medical practitioner for all queries or doubts related to your medical condition. Do not ignore professional medical advice or delay seeking it based on the content encountered on our website. We intend to support, not replace, the doctor-patient relationship.
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Content verified by

Dr. Upasana Bhatia
MBBS - General Medicine
Last update on 01-Oct-2024