Prescription requiredThyroid hormone

Thyrox 50 Tablet — Side Effects & Warnings

Known side effects of Thyrox 50 Tablet include Palpitations,fast heartbeat,anxiety,insomnia,headache,tremor,sweating,heat intolerance,diarrhoea,nausea,weight loss,irritability. Not everyone experiences these side effects.

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

Common Side Effects

Palpitations
fast heartbeat
anxiety
insomnia
headache
tremor
sweating
heat intolerance
diarrhoea
nausea
weight loss
irritability

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

Important Warnings

Schedule H: use under medical supervision. Incorrect dosing can cause hyperthyroidism symptoms (chest pain, palpitations, breathlessness) and may worsen heart disease; use caution in elderly, coronary artery disease, arrhythmias, hypertension. Dose adjustments needed in pregnancy, postpartum, and with weight changes. Not for weight loss/obesity. Use caution in adrenal insufficiency (treat first) and diabetes (may alter glucose control).

Drug Interactions

Thyrox 50 Tablet may interact with the following:

Calcium salts
iron supplements
aluminium/magnesium antacids
sucralfate
cholestyramine/colestipol
sevelamer
orlistat (reduce absorption); rifampicin
carbamazepine
phenytoin
phenobarbital
sertraline (may reduce effect); warfarin (increased anticoagulant effect); insulin/oral antidiabetics (dose may need adjustment); digoxin (levels/effect may change).

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

Pregnancy Safety

Generally safe (dose adjustment and monitoring needed)

Alcohol Interaction

Use with caution

Habit Forming

Storage

Store below 25°C in a dry place, protected from light and moisture. Keep tablets in original pack and out of reach of children.

Thyrox 50 Tablet — Safety Summary

Composition: Levothyroxine sodium 50 mcg (equivalent to Levothyroxine 50 mcg)
Prescription: Required (Rx)
Pregnancy: Generally safe (dose adjustment and monitoring needed)
Alcohol: Use with caution
Habit forming: No

Thyrox 50 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.