Prescription requiredThyroid hormone

Eltroxin 100 Tablet — Side Effects & Warnings

Known side effects of Eltroxin 100 Tablet include Palpitations, fast heartbeat, nervousness, insomnia, tremor, headache, increased appetite, weight loss, heat intolerance. Not everyone experiences these side effects.

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated July 2026

Common Side Effects

Palpitations
fast heartbeat
nervousness
insomnia
tremor
headache
increased appetite
weight loss
heat intolerance

This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.

Important Warnings

Overdose may cause hyperthyroidism symptoms and increase risk of arrhythmia and bone loss. Use caution in heart disease, elderly, adrenal insufficiency, and untreated thyrotoxicosis. Regular TSH monitoring is needed; do not switch brands or stop abruptly without medical advice.

Drug Interactions

Eltroxin 100 Tablet may interact with the following:

Calcium salts
iron salts
antacids containing aluminium/magnesium
sucralfate
cholestyramine/colestipol
orlistat
rifampicin
carbamazepine
phenytoin
sertraline
warfarin (may increase effect)
antidiabetic medicines (dose adjustment may be needed)

Always tell your doctor about all medicines you are taking, including over-the-counter drugs and supplements.

Pregnancy Safety

Generally safe

Alcohol Interaction

Use with caution

Habit Forming

Storage

Store below 25°C, protected from light and moisture. Keep in original blister pack.

Eltroxin 100 Tablet — Safety Summary

Composition: Thyroxine (100mcg)
Prescription: Required (Rx)
Pregnancy: Generally safe
Alcohol: Use with caution
Habit forming: No

Eltroxin 100 Tablet — Safety FAQs

What should I do if I experience side effects?

Mild side effects often resolve on their own. If side effects are severe or persistent, stop the medicine and consult your doctor immediately.

Are all listed side effects common?

No. Some side effects are common while others are rare. Not everyone experiences side effects. Consult your doctor if you are concerned.

Can I take this medicine with other drugs?

Some medicines interact with each other. Always inform your doctor about all medicines you are currently taking.

When should I seek emergency help?

Seek immediate medical attention if you experience severe allergic reactions (difficulty breathing, swelling of face/throat), chest pain, or any life-threatening symptoms.

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Safety disclaimer

This information is for educational purposes only and is not a substitute for professional medical advice. If you experience severe side effects, seek medical attention immediately.