Information about Thyroxine

Thyroxine Uses

Thyroxine is used in the treatment of hypothyroidism.

How Thyroxine works

Thyroxine is a synthetic version of a hormone produced by the thyroid gland. It works by replacing the thyroid hormones that your thyroid gland cannot produce and relieves the symptoms of hypothyroidism (tiredness, weight gain, and depression).

Common side effects of Thyroxine

Headache, Fatigue, Electrolyte imbalance, Dizziness, Muscle cramp
Written By
MDS (Oral Pathology & Microbiology), BDS
Reviewed By
MD Pharmacology, MBBS
Last updated
13 Jun 2023 | 11:29 AM (UTC)

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Available Medicine for Thyroxine

29 to ₹29120 variant(s)
ThyroxMacleods Pharmaceuticals Pvt Ltd
34 to ₹31822 variant(s)
EltroxinGlaxo SmithKline Pharmaceuticals Ltd
89 to ₹1939 variant(s)
Thyroxoin SodiumMacleods Pharmaceuticals Pvt Ltd
781 variant(s)
ThyrofitEris Lifesciences Ltd
36 to ₹17711 variant(s)
LethyroxIntas Pharmaceuticals Ltd
25 to ₹16215 variant(s)
EuthyroidAkumentis Healthcare Ltd
64 to ₹1303 variant(s)
ThyromedComed Chemicals Ltd
121 to ₹1605 variant(s)
ThyrorichPrimus Remedies Pvt Ltd
115 to ₹1909 variant(s)
ThyroupLupin Ltd
118 to ₹22811 variant(s)

Expert advice for Thyroxine

  • Thyroxine should be taken on an empty stomach (ideally, first thing in the morning). No food, milk, or tea should be taken 1 hour before and 2 hours after taking this medicine.
  • It may take 6 to 8 weeks to get the full effect.
  • For most people, Thyroxine can be a lifelong medication. Do not discontinue it without discussing your doctor.
  • Inform your doctor if you have diarrhea, nervousness, irritability, sleep disturbances, shaking hands, or chest pain. Your doctor may adjust your dose.
  • Leave a gap of at least 4 hours before taking any antacids, calcium or iron supplements, and multivitamins, as these may interfere with the effect of the medicine.
  • Get your hormone levels checked regularly and inform your doctor if you notice a significant change in your body weight. The dose may need to be adjusted.
  • Inform your doctor before changing the brand of Thyroxine as all brands may not have the same effect.

Frequently asked questions for Thyroxine


Q. What should I do if I accidentally take more than the dose required?

An overdose of this medicine may cause nervousness, anxiety, rapid heartbeat, hand tremors, excessive sweating, weight loss, and sleep problems. You should immediately consult your doctor in case of an overdose.

Q. How long do I need to take Thyroxine?

You should take Thyroxine as long as your doctor has recommended. Usually, it is prescribed for the long term and you may have to take it lifelong. Do not stop taking the medicine, as your symptoms of low levels of thyroid hormone may reoccur.

Q. How should Thyroxine be taken?

Take Thyroxine exactly as advised by your doctor. Thyroxine should be taken orally preferably before breakfast or as a first meal of the day. It should be swallowed whole with plenty of water.

Q. Being a diabetic what should I be aware of while taking Thyroxine?

Thyroxine may raise blood sugar levels and may affect the working of other anti-diabetic medicines which you might be taking. Hence, dose adjustment may be required. Consult your doctor who will help you with dose management.

Q. Does Thyroxine affect contraception?

Oral birth control pills, which contain both estrogen and progesterone may reduce the amount of Thyroxine in your body and therefore the dose of Thyroxine may have to be increased.

Q. What are the side effects of taking Thyroxine?

The side effects of Thyroxine are mostly seen when it is taken at high doses. These symptoms include allergic reaction, headache, vomiting, flushing, high temperature, sweating, weight loss, tremor, restlessness, and excitability. It may also cause difficulty in sleeping (insomnia), increased pressure around the brain in children (benign intracranial hypertension), chest pain (angina), pounding, irregular or fast heartbeat, diarrhea, muscle cramps, and muscle weakness. The other side effects related to Thyroxine include deformity of the skull in infants caused by the early closure of joints in the skull bone (craniostenosis), growth in children may slow or stop due to changes in bone growth, irregular periods, intolerance to heat, and temporary hair loss in children.

Q. What does thyroxine do? Why is it important?

Thyroxine hormone controls how much energy your body uses. It plays an important role in regulating your body weight, muscle strength, body temperature, and even your mood. Along with that, it is important for your digestion, heart muscles, brain development, and bone health.


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