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Prescription requiredIntas Pharmaceuticals LtdThyroid hormone
Lethyrox 50
Thyroxine
₹127MRP ₹134In stock
Delivery across India. Free above ₹999; ₹49 from ₹499, ₹99 below. Chennai express delivery is chargeable.
This medicine needs a prescription.
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Lethyrox 50 is used for this medicine is used in the treatment of hypothyroidism, goitre and thyroid hormone replacement.
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026
Licensed pharmacyPharmacist-verified orderDelivered across India
Key details
Salt: Thyroxine
Available variants: NA 120`S
Best price: ₹127
MRP: ₹134
Prescription: Required
Manufacturer: INTAS PHARMACEUTICALS`
Ordering notes
Standard delivery across India. No same-day delivery nationally.
Chennai express delivery is possible and chargeable. Learn more
Returns & refunds: orders can be cancelled before dispatch; after dispatch, returns depend on the item category. Read the full policy
Composition of Lethyrox 50
Lethyrox 50 contains Thyroxine. It belongs to the Thyroid hormone replacement class of medicines.
Uses of Lethyrox 50
- This medicine is used in the treatment of hypothyroidism
- goitre and thyroid hormone replacement.
Key benefits
- Restores energy
- weight and concentration
- Inexpensive
- once daily
- and highly effective
How Lethyrox 50 works
Thyroxine replaces the thyroid hormone your gland is not making enough of, restoring your body's normal pace.
How to take Lethyrox 50
Use this medicine as your doctor has directed. Follow the dose and the duration written on your prescription.
Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.
Missed dose and overdose
If you miss a dose
Take it as soon as you remember. If your next dose is almost due, skip the one you missed — never take two doses together to catch up.
If you take too much
An overdose of this medicine can cause a racing heart, chest pain, tremor, fever and dangerous heart rhythm disturbance. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.
Side effects of Lethyrox 50
Most side effects of Lethyrox are mild and settle as the body adjusts. Reported side effects include:
- Palpitations
- Tremor
- Sweating
- Weight loss
- Difficulty sleeping
- Anxiety
Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.
Safety advice for Lethyrox 50
| Pregnancy | Generally considered safe in pregnancy. Tell your doctor if you are pregnant or planning to be. |
|---|---|
| Breastfeeding | Generally considered safe while breastfeeding. |
| Alcohol | Alcohol may worsen the side effects of this medicine. Limit it. |
| Driving | Not expected to affect your ability to drive. |
| Kidney | No dose change is usually needed in kidney disease. |
| Liver | No dose change is usually needed in liver disease. |
| Habit forming | No |
Warnings and precautions
Take it on an empty stomach, first thing in the morning, with water, and wait at least half an hour to an hour before eating or drinking anything else. Food, tea and coffee substantially reduce how much is absorbed. Separate it by at least four hours from calcium, iron, antacids and multivitamins — these bind it and block absorption. This is usually lifelong treatment. Do not stop when your reports come back normal; the normal report is the medicine working. Report palpitations, tremor, marked weight loss or difficulty sleeping — these suggest the dose is too high. Tell your doctor if you become pregnant; the requirement usually rises and needs prompt adjustment.
Do not take Lethyrox if
Not for anyone with a known allergy to this medicine or to any ingredient in the pack. Not for people with an untreated overactive thyroid or untreated adrenal insufficiency.
Interactions with other medicines
Calcium, iron, antacids, multivitamins and some cholesterol medicines block absorption — separate them by four hours. Tell your doctor if you take a blood thinner or diabetes medicine; doses may need review.
How to store Lethyrox 50
Store below 30°C in the original pack, away from direct sunlight and moisture. Keep out of the reach of children.
Expert advice for Lethyrox 50
Keep to the same brand where you can, and take it at the same time every morning. Have your thyroid blood test repeated as your doctor advises after any dose change.
Manufacturer and class
- Manufacturer:
- INTAS PHARMACEUTICALS`
- Therapeutic class:
- Thyroid hormone
- Drug class:
- Thyroid hormone replacement
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Lethyrox 50 FAQs
What is Lethyrox 50 used for?
Lethyrox 50 is commonly used for This medicine is used in the treatment of hypothyroidism, goitre and thyroid hormone replacement. Always follow your doctor's advice, this information is for educational purposes and not a substitute for professional medical guidance.
What is the salt in Lethyrox 50?
Lethyrox 50 contains Thyroxine. If you are allergic to any of these active ingredients or excipients, do not take this medicine and speak to your doctor first.
How should I take Lethyrox 50?
Use this medicine as your doctor has directed. Take it exactly as prescribed; do not change the dose or stop early without talking to your doctor.
How does Lethyrox 50 work?
Thyroxine replaces the thyroid hormone your gland is not making enough of, restoring your body's normal pace.
Is Lethyrox 50 a prescription medicine?
Yes. Lethyrox 50 is a prescription-only (Rx) medicine. Upload a valid prescription from a registered medical practitioner during checkout. We cannot dispense it without a valid Rx.
What are the common side effects of Lethyrox 50?
The side effects reported most often with Lethyrox are Palpitations, Tremor, Sweating, Weight loss, Difficulty sleeping. Most are mild and settle as the body adjusts; tell your doctor if any of them persist or worry you, and stop the medicine and seek help at once for a rash, swelling of the face or lips, or difficulty breathing.
Can Lethyrox 50 be taken during pregnancy?
Generally considered safe in pregnancy. Always tell your doctor if you are pregnant, planning a pregnancy or breastfeeding before starting Lethyrox.
Can I drink alcohol while taking Lethyrox 50?
Alcohol may worsen the side effects of this medicine.
What if I miss a dose of Lethyrox 50?
Take it as soon as you remember.
Is Lethyrox 50 habit forming?
No. Lethyrox 50 is not known to be habit forming when taken as prescribed.
How much does Lethyrox 50 cost on PingMeDoc Pharmacy?
Lethyrox 50 starts at ₹127 (MRP ₹134) on PingMeDoc Pharmacy. Available in NA 120`S. Final price is confirmed at checkout and may vary by variant and location.
Who manufactures Lethyrox 50?
Lethyrox 50 is manufactured by INTAS PHARMACEUTICALS`. PingMeDoc Pharmacy sources medicines only from licensed manufacturers and distributors.
How is Lethyrox 50 delivered?
Lethyrox 50 is delivered across India via our licensed pharmacy partners. Standard delivery timelines are confirmed at checkout. Chennai customers can opt for chargeable same-city express delivery.
Lethyrox 50, Quick facts
- Salt
- Thyroxine
- Best price
- ₹127
- MRP
- ₹134
- Prescription
- Required (Rx)
- Brand
- Intas Pharmaceuticals Ltd
- Manufacturer
- INTAS PHARMACEUTICALS`
- Therapeutic class
- Thyroid hormone
- Drug class
- Thyroid hormone replacement
- Habit forming
- No
- Variants
- NA 120`S
- Delivery
- Standard across India
References
The information on Lethyrox 50 is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.
- PingMeDoc clinical monograph library — compiled from Indian package inserts, the Indian Pharmacopoeia
- CDSCO schedules and standard pharmacology references. Reviewed for patient readability. This is general information, not a substitute for your doctor's advice.
- Central Drugs Standard Control Organisation (CDSCO), Ministry of Health & Family Welfare, Government of India, approved drug and schedule listings.
- National List of Essential Medicines (NLEM) 2022, Government of India.
- Manufacturer's package insert / prescribing information for Lethyrox 50.
- World Health Organization, ATC/DDD classification and Model Formulary for the active ingredient.
Next steps
Safety disclaimer
Product information is for general awareness and does not replace professional medical advice. Always follow a clinician's guidance and upload a valid prescription when required.