L Thyroid 50 MCG 100 Tablet 100

Johnlee Pharmaceuticals Pvt Ltd

Pack of 100 Units

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MRP ~~₹96.43~~

₹77.14

₹0.96/Units

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Prescription required for this medicine

Store Below 30^o C

Composition

Thyroxine (50 Mg)

Strength:

50 MG 75 MCG 12.5 MCG

L Thyroid 50 MCG 100 Tablet 100 is used to treat hypothyroidism, a condition where the thyroid gland does not produce enough hormones. It belongs to a class of medications known as thyroid hormone replacements, which help restore normal thyroid function in the body.

In addition to managing hypothyroidism, this medicine is sometimes used in the treatment of certain types of thyroid cancer. When thyroid hormone levels are low, you may experience symptoms such as fatigue, weight gain, sensitivity to cold, dry skin, and constipation.

This medicine should be taken as directed by your doctor, preferably on an empty stomach, about 30 minutes to one hour before breakfast. It's important to inform your doctor about any pre-existing conditions or ongoing medications before starting this medicine. If you notice any side effects while taking this medicine, notify your doctor promptly. Continue taking the medicine for the duration prescribed by your doctor to achieve optimal results.

L Thyroid 50 MCG 100 Tablet 100 is used for the following:

Treatment of an underactive thyroid gland
Management of hypothyroidism
Replacement of thyroid hormones
Regulation of metabolism
Support for proper protein synthesis
Maintenance of bone health
Management of certain types of thyroid cancer
Prevention of hypothyroidism symptoms
Treatment of thyroid hormone deficiency
Support for energy production in the body

Follow these instructions while taking L Thyroid 50 MCG 100 Tablet 100:

Swallow the tablet whole with a glass of water.
Do not crush or chew the tablet.
Take this tablet at the same time every day.
Consult your doctor if you have questions about how to take this medicine.

L Thyroid 50 MCG 100 Tablet 100 is taken orally

L Thyroid 50 MCG 100 Tablet 100 may have the following common side effects:

Palpitations: You might feel your heart beating faster or harder than usual.
Anxiety
Tremors: These are involuntary, rhythmic muscle movements, usually in the hands.
Diarrhoea
Weight loss
Increased appetite
Headache
Insomnia: This refers to difficulty falling asleep or staying asleep throughout the night.

Managing the Side Effects:

Most side effects are temporary and generally harmless, which resolve on discontinuing the use of L Thyroid 50 MCG 100 Tablet 100. However, if you experience any serious side effects or worsening of any of the symptoms, please consult your doctor.

Here are some ways to manage common side effects:

Insomnia: Consider taking L Thyroid 50 MCG 100 Tablet 100 in the morning rather than later in the day to reduce sleep disturbances.
Increased appetite: Taking this medicine with a meal may help manage feelings of hunger throughout the day.

L Thyroid 50 MCG 100 Tablet 100 contains levothyroxine, which works on the body as follows:

Hormone Replacement: Levothyroxine acts as a synthetic version of thyroxine (T4), replacing the natural thyroid hormone that your body lacks when you have hypothyroidism.
Metabolism Regulation: It helps regulate your body's metabolism, which controls how quickly your body uses energy, makes proteins, and responds to other hormones.
Energy Production: Levothyroxine increases the basal metabolic rate, helping your cells produce energy more efficiently and reducing symptoms like fatigue and cold sensitivity.
Protein Synthesis: It supports proper protein synthesis in the body, which is essential for maintaining healthy tissues, muscles, and organs.
Bone Metabolism: The medicine helps maintain normal bone density and turnover, preventing potential bone-related complications associated with untreated hypothyroidism.

Pregnancy

Caution is advised while taking L Thyroid 50 MCG 100 Tablet 100 if you are pregnant. Pregnant women may require dose adjustments throughout pregnancy, as thyroid hormone requirements often increase during this time. It is best to consult your doctor before taking this medicine.

Breastfeeding

Exercise caution while taking L Thyroid 50 MCG 100 Tablet 100 if you are breastfeeding. It is best to consult your doctor before taking this medicine.

Alcohol

Caution is advised while consuming alcohol when taking L Thyroid 50 MCG 100 Tablet 100. Alcohol might interfere with how your body processes this medicine. It is best to consult your doctor about alcohol consumption while on this medicine.

Liver

Exercise caution while taking L Thyroid 50 MCG 100 Tablet 100 if you have any liver problems. It is best to consult your doctor before taking this medicine.

Kidney

Caution is advised before using L Thyroid 50 MCG 100 Tablet 100 if you have a history of any kidney problems. It is a good idea to consult your doctor before taking this medicine.

Using Machines & Driving

You may drive and operate machines while taking L Thyroid 50 MCG 100 Tablet 100 unless you experience side effects like dizziness or tremors. If you notice any symptoms that affect your concentration, avoid these activities and speak with your doctor.

Allergy

If you have known allergies to levothyroxine or any other ingredients in L Thyroid 50 MCG 100 Tablet 100, do not take this medicine. Tell your doctor about all your allergies before starting treatment.

Children

Caution is advised while giving L Thyroid 50 MCG 100 Tablet 100 to children. The dosage for children differs from adults and requires careful monitoring. Always consult your doctor before giving this medicine to a child.

Older Patients

Older patients should take L Thyroid 50 MCG 100 Tablet 100 under medical supervision, as they may be more sensitive to its effects. Your doctor might start with a lower dose and gradually increase it based on your response and blood test results.

Drug-Drug Interactions

L Thyroid 50 MCG 100 Tablet 100 can interact with the following medicines:

Antacids: Medicines containing calcium or aluminium can reduce absorption of levothyroxine. Take L Thyroid 50 MCG 100 Tablet 100 at least 4 hours apart from these medicines.
Iron supplements: Iron preparations such as ferrous fumarate and ferrous sulphate can decrease the effectiveness of levothyroxine by interfering with absorption. Take these medicines several hours apart.
Oestrogen medications: Contraceptive pills and hormone replacement therapies may increase thyroid hormone requirements, potentially reducing L Thyroid 50 MCG 100 Tablet 100's effectiveness.
Heart medications: Medicines like amiodarone can alter the effectiveness of levothyroxine, requiring dose adjustments and careful monitoring.

Drug-Food Interactions

L Thyroid 50 MCG 100 Tablet 100 may interact with certain foods that may affect its absorption.

Soy products: Soy-based foods can decrease absorption of levothyroxine.
High-fibre foods: Foods rich in fibre may reduce the effectiveness of L Thyroid 50 MCG 100 Tablet 100.

Drug-Disease Interactions

L Thyroid 50 MCG 100 Tablet 100 may interact with the following diseases:

Adrenal insufficiency: Taking L Thyroid 50 MCG 100 Tablet 100 when you have untreated adrenal insufficiency can trigger an adrenal crisis, a dangerous condition requiring immediate medical attention.
Thyrotoxicosis: L Thyroid 50 MCG 100 Tablet 100 should not be used in patients with this condition as it may worsen symptoms of excessive thyroid hormone.
Heart disease: This medicine may worsen certain heart conditions, particularly in elderly patients with cardiovascular problems.

Daily Dose

The daily dose of L Thyroid 50 MCG 100 Tablet 100 should be taken as prescribed by your doctor. The dosage may change based on individual factors such as the severity of hypothyroidism and your response to treatment. Follow the prescribed dosage carefully.

Over Dose

Taking too much L Thyroid 50 MCG 100 Tablet 100 may cause palpitations (rapid heartbeat), anxiety, tremors, headache, insomnia, diarrhoea, increased appetite, and excessive sweating. Contact your doctor if you experience these symptoms after taking extra tablets.

Missed Dose

If you forget to take L Thyroid 50 MCG 100 Tablet 100, take it as soon as you remember. If it's almost time for your next dose, skip the missed one and resume your regular schedule. Never increase your dosage without consulting your doctor.

Store L Thyroid 50 MCG 100 Tablet 100 at temperatures below 30°C.
Keep away from direct sunlight, heat and moisture.
Store in the original packaging to protect from light and air.
Keep all medicines out of sight and reach of children.
Do not use the medication after the expiry date printed on the package.
Discard any unused medicine properly.

Maintain consistent meal times each day to help your body regulate metabolism, as hypothyroidism (an underactive thyroid gland) can slow down your metabolic rate.
Take L Thyroid 50 MCG 100 Tablet 100 on an empty stomach 30-60 minutes before breakfast, avoiding calcium-rich foods, coffee, or tea within this timeframe as they can reduce how well your body absorbs the medicine.

Fact Box

Available Dosage Types	Tablet
Habit Forming	No
Ailment	Hypothyroidism, thyroid deficiency
Drug Category	Thyroid hormone replacement
Therapeutic Category	Hypothyroidism treatment

How long does it take for L Thyroid 50 MCG 100 Tablet 100 to start working?

You may not notice effects immediately. It may take 2-3 weeks before you begin feeling better, as your body needs time to adjust to the thyroid hormone replacement.

What should I do if I miss a dose of L Thyroid 50 MCG 100 Tablet 100?

Take it as soon as you remember. If it's nearly time for your next dose, skip the missed one. Never take a double dose to make up for a forgotten tablet.

Can I take L Thyroid 50 MCG 100 Tablet 100 with food?

It's best to take this medicine on an empty stomach, about 30-60 minutes before breakfast, for proper absorption. Avoid taking it with food, especially dairy products.

Will L Thyroid 50 MCG 100 Tablet 100 cause weight loss?

As your thyroid levels normalize, your metabolism may improve. Some weight changes might occur, but this medicine is not intended for weight loss purposes.

How should I store my L Thyroid 50 MCG 100 Tablet 100?

Keep it at room temperature away from moisture, heat and direct light. Store in the original packaging and keep out of reach of children.

Can I drink coffee shortly after taking L Thyroid 50 MCG 100 Tablet 100?

Wait at least 30-60 minutes after taking this medicine before consuming coffee, tea or milk, as these can interfere with levothyroxine absorption.

Do I need regular blood tests while taking L Thyroid 50 MCG 100 Tablet 100?

Yes, regular thyroid function tests are important to monitor your thyroid hormone levels and ensure you're receiving the correct amount of medicine.

Last Updated On 11 Jun. 2025 | 9:48AM (IST)

Certified Content

Written by

Ashmita Borgohain

Medical Content Writer | 12 years

MSc (Applied Genetics)

Reviewed by

Dr. Chhavi Rosha

Medical Content Writer | 9 years

BAMS, FMC, MD Resident

Check out Editorial Policy

Manufacturer details

42/44, Babu Genu Road, Shop No. 06, 2nd Floor, Om Shanti Co-op Housing Society, Kalbadevi Road, Mumbai-400002. (India)

Expiry on or after: December 2025

In case of any issues, contact us:

support@truemeds.in|08069808861

Address: 6th floor, Urmi Corporate Park Solaris, Saki Vihar Road, Andheri East, Mumbai 400071

References

DailyMed - LEVOTHYROXINE SODIUM tablet. (n.d.). https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=e95720f2-91c9-a6d0-f7d5-8bcb94d07bbc
Eghtedari, B., & Correa, R. (2023, August 28). Levothyroxine. StatPearls - NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK539808/
PubChem. (n.d.-v). Levothyroxine. PubChem. https://pubchem.ncbi.nlm.nih.gov/compound/Levothyroxine
Research, C. F. D. E. A. (2022, March 4). Levothyroxine sodium product Information. U.S. Food And Drug Administration. https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/levothyroxine-sodium-product-information
Highlights of prescribing information. (2002). [Prescribing information]. In SYNTHROID®. https://www.accessdata.fda.gov/drugsatfda_docs/label/2022/021402s036lbl.pdf

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Disclaimer

We, at Truemeds make a diligent attempt to deliver accurate, expert- drafted and thoroughly reviewed medicine related information to our consumers. However, it should, by no means, be considered a substitute for prescription from a certified doctor or a trustworthy doctor-patient relationship. In fact we detest any form of self medication without expert advice. The sole purpose of the information on our portal is to educate our consumers, which helps improve the communication between a doctor and a patient. The information by no means is complete in its entirety and should not be used to diagnose or treat any medical condition. No amount of information can replace the experience and expertise of a doctor, therefore his/her advice always holds priority and should be followed appropriately.

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