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Euthyrox 12.5 Tablet
Levothyroxine sodium 12.5 mcg
Euthyrox 12.5 Tablet is used for hypothyroidism (underactive thyroid), thyroid hormone replacement after thyroidectomy or radioiodine therapy, goiter suppression as advised.
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026
₹158₹1.58 per tablet
Licensed pharmacyPharmacist-verified orderDelivered across India
Key details
Salt: Levothyroxine sodium 12.5 mcg
Available variants: tablet 100 Tablet
Best price: ₹158 (₹1.58 per tablet)
Prescription: Required
Manufacturer: MERCK PHARMA
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 Euthyrox 12.5 Tablet
Euthyrox 12.5 Tablet contains Levothyroxine sodium 12.5 mcg. It belongs to the Thyroid hormone (T4) class of medicines.
Uses of Euthyrox 12.5 Tablet
- Hypothyroidism (underactive thyroid)
- thyroid hormone replacement after thyroidectomy or radioiodine therapy
- goiter suppression as advised
Key benefits
- Restores normal thyroid levels
- Improves fatigue and sluggishness
- Supports metabolism and weight control when hypothyroid
- Helps maintain normal heart and body functions
How Euthyrox 12.5 Tablet works
Levothyroxine is synthetic T4 thyroid hormone. It is converted to T3 in the body and restores normal thyroid hormone levels, improving metabolism, energy and temperature regulation.
How to take Euthyrox 12.5 Tablet
Take once daily on an empty stomach with water, ideally 30-60 minutes before breakfast. Take at the same time every day; avoid taking with calcium/iron/antacids within 4 hours. Dose is individualized based on TSH.
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 Euthyrox 12.5 Tablet
Most side effects of Euthyrox are mild and settle as the body adjusts. Reported side effects include:
- Palpitations
- increased heart rate
- nervousness
- tremor
- insomnia
- sweating
- weight loss
- headache (usually with over-replacement)
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 Euthyrox 12.5 Tablet
| Pregnancy | Generally safe; dose often needs adjustment under doctor supervision |
|---|---|
| Breastfeeding | Generally considered safe while breastfeeding. |
| Alcohol | No known interaction |
| 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
Do not use for weight loss. Use caution in heart disease, arrhythmias and elderly; start low and titrate. Monitor TSH regularly; overdose can cause chest pain, breathlessness or severe palpitations. May reduce bone density with long-term excess dose.
Do not take Euthyrox 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 salts, iron salts, antacids (aluminum/magnesium), sucralfate, cholestyramine/colestipol, orlistat, rifampicin, carbamazepine, phenytoin, sertraline, warfarin (effect may increase), insulin/oral antidiabetics (dose may need adjustment)
How to store Euthyrox 12.5 Tablet
Store below 25°C, protected from light and moisture. Keep tablets in blister until use.
Expert advice for Euthyrox 12.5 Tablet
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:
- MERCK PHARMA
- Therapeutic class:
- Hormone replacement
- Drug class:
- Thyroid hormone (T4)
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Euthyrox 12.5 Tablet FAQs
What is Euthyrox 12.5 Tablet used for?
Euthyrox 12.5 Tablet is commonly used for Hypothyroidism (underactive thyroid), thyroid hormone replacement after thyroidectomy or radioiodine therapy, goiter suppression as advised. 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 Euthyrox 12.5 Tablet?
Euthyrox 12.5 Tablet contains Levothyroxine sodium 12.5 mcg. 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 Euthyrox 12.5 Tablet?
Take once daily on an empty stomach with water, ideally 30-60 minutes before breakfast. Take it exactly as prescribed; do not change the dose or stop early without talking to your doctor.
How does Euthyrox 12.5 Tablet work?
Levothyroxine is synthetic T4 thyroid hormone.
Is Euthyrox 12.5 Tablet a prescription medicine?
Yes. Euthyrox 12.5 Tablet 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 Euthyrox 12.5 Tablet?
The side effects reported most often with Euthyrox are Palpitations, increased heart rate, nervousness, tremor, insomnia. 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 Euthyrox 12.5 Tablet be taken during pregnancy?
Generally safe; dose often needs adjustment under doctor supervision Always tell your doctor if you are pregnant, planning a pregnancy or breastfeeding before starting Euthyrox.
Can I drink alcohol while taking Euthyrox 12.5 Tablet?
No known interaction
What if I miss a dose of Euthyrox 12.5 Tablet?
Take it as soon as you remember.
Is Euthyrox 12.5 Tablet habit forming?
No. Euthyrox 12.5 Tablet is not known to be habit forming when taken as prescribed.
How much does Euthyrox 12.5 Tablet cost on PingMeDoc Pharmacy?
Euthyrox 12.5 Tablet starts at ₹158 on PingMeDoc Pharmacy. Available in tablet 100 Tablet. Final price is confirmed at checkout and may vary by variant and location.
Who manufactures Euthyrox 12.5 Tablet?
Euthyrox 12.5 Tablet is manufactured by MERCK PHARMA. PingMeDoc Pharmacy sources medicines only from licensed manufacturers and distributors.
How is Euthyrox 12.5 Tablet delivered?
Euthyrox 12.5 Tablet 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.
Euthyrox 12.5 Tablet, Quick facts
- Salt
- Levothyroxine sodium 12.5 mcg
- Form
- tablet
- Best price
- ₹158 (₹1.58 per tablet)
- Prescription
- Required (Rx)
- Schedule
- Schedule H
- Brand
- Merck Ltd
- Manufacturer
- MERCK PHARMA
- Therapeutic class
- Hormone replacement
- Drug class
- Thyroid hormone (T4)
- Habit forming
- No
- Variants
- tablet 100 Tablet
- Delivery
- Standard across India
References
The information on Euthyrox 12.5 Tablet 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.
- Manufacturer labeling, established endocrinology literature
- Indian Pharmacopoeia (API standards)
- 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 Euthyrox 12.5 Tablet.
- 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.