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Thyroxine

Information

Uses

Thyroxine is used in the treatment of hypothyroidism and myxedema coma.

How it works

Thyroxine is similar in structure to the hormone naturally produced by the thyroid gland. It provides more thyroid hormones and relieves the symptoms of tiredness, weight gain, and depression.

Common side effects

Enlarged thyroid gland, Increased heart rate, Goiter, Insomnia (difficulty in sleeping), Altered heart rate, Abdominal pain, Fever, Diarrhoea, Irregular menstrual cycle, Increased blood pressure, Chest pain, Nervousness, Tremor

Available Medicine

  • ₹95 to ₹169
    Abbott India Ltd
    10 variant(s)
  • ₹69 to ₹117
    Glaxo SmithKline Pharmaceuticals Ltd
    6 variant(s)
  • ₹66 to ₹150
    Lupin Ltd
    7 variant(s)
  • ₹66 to ₹129
    Merck Ltd
    5 variant(s)
  • ₹28 to ₹38
    Eris Life Sciences Pvt Ltd
    6 variant(s)
  • ₹47 to ₹128
    Intas Pharmaceuticals Ltd
    5 variant(s)
  • ₹28 to ₹35
    Micro Labs Ltd
    2 variant(s)
  • ₹95 to ₹130
    Primus Pharmaceuticals
    7 variant(s)
  • ₹112 to ₹137
    Cadila Pharmaceuticals Ltd
    4 variant(s)
  • ₹125
    Erinyle Pharma
    1 variant(s)

Expert advice

  • Thyroxine must be taken on an empty stomach. No food, milk, or tea should be taken 1 hour before and 2 hours after taking this medicine.
  • You may have to wait for 6 to 8 weeks to get the full effect.
  • Your doctor may ask you to continue it lifelong. You must not stop taking it or change the dose, without speaking to your doctor first.
  • Dose adjustments are usually needed when starting the medicine and when your health changes.
  • Tell your doctor if you are pregnant or planning to get pregnant or breastfeeding.
  • Inform your doctor if you have heart disease. You may require a lesser dose of the medicine.
  • Inform your doctor if you get diarrhoea, nervousness, rapid pulse, insomnia, tremors, or chest pain could indicate severe toxicity and should prompt immediate medical attention. Your doctor may adjust the dose.

Frequently asked questions

Thyroxine

Q. Is thyroxine for hypothyroidism?
Yes, thyroxine is used for hypothyroidism. Thyroxine is a hormone which is produced naturally in the body by the thyroid gland. Levothyroxine is a synthetic version of this hormone. When the thyroid gland does not produce enough thyroxine (a condition known as hypothyroidism), many of the body’s functions slow down. Levothyroxine tablets are used to replace the thyroxine that your thyroid gland cannot produce and prevent the symptoms of hypothyroidism.
Q. What is thyroxine?
Thyroxine is a hormone which is produced naturally in the body by the follicular cells of thyroid gland.
Q. Is thyroxine an amine or peptide?
Thyroxine is derived from amino acid tyrosine bound covalently to iodine after biochemical synthesis.
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Q. Is levothyroxine gluten free and still available?
Yes, levothyroxine is gluten free and is available in India as a prescription medicine.
Q. Is thyroxine used for hyperthyroidism?
Thyroxine is not used for the treatment of hyperthyroidism. Rather, it is used for the treatment of hypothyroidism.
Q. Is thyroxine dangerous?
No, thyroxine is not dangerous but check with your doctor, if you observe any symptoms of possible side effects while taking thyroxine. It is safe to use if taken in doses as advised by your doctor.
Q. Is thyroxine a steroid?
No, thyroxine is not a steroid. Thyroxine is a hormone which is produced naturally in the body by the thyroid gland. Levothyroxine is a synthetic version of this hormone and is used to replace the thyroxine that your thyroid gland cannot produce and prevent the symptoms of hypothyroidism.
Q. Is thyroxine a hormone?
Thyroxine is a hormone which is produced naturally in the body by the thyroid gland. Thyroxine controls how much energy your body uses. It regulates many metabolic processes of your body and plays an important role in normal growth and development and normal maturation of the central nervous system and bone.
Q. Is thyroxine safe in pregnancy?
Thyroxine is safe to take during pregnancy. If you are pregnant, you can continue with thyroxine as it has been seen to be safe for the child. However, please consult your doctor as it is advisable to talk to your doctor before taking any medicine during pregnancy.
Q. Is thyroxine and levothyroxine the same thing?
Thyroxine is a hormone which is produced naturally in the body by the thyroid gland. Levothyroxine is a synthetic version of this hormone. When the thyroid gland does not produce enough thyroxine (a condition known as hypothyroidism), many of the body’s functions slow down. Levothyroxine tablets are used to replace the thyroxine that your thyroid gland cannot produce and prevent the symptoms of hypothyroidism.
Q. Can I take levothyroxine with food?
Levothyroxine tablets should be taken before breakfast or your first meal of the day. Levothyroxine tablets should be swallowed with plenty of water.
Q. Can I take levothyroxine with coffee?
There are no reports on whether thyroxine can be taken with coffee or not. However, it is recommended to be taken before breakfast or your first meal of the day and should be swallowed with plenty of water.
Q. Can I take levothyroxine with vitamin D?
Levothyroxine can be taken with vitamin D. No drug-drug interactions have been reported between the two. However, this does not mean that interactions cannot occur. Please consult your doctor before taking the two medicines together.
Q. Can I take levothyroxine with milk?
There are no specific reports or studies on whether levothyroxine can be taken with milk or not. However, it is recommended that levothyroxine tablets should be taken before breakfast or your first meal of the day and should be swallowed with plenty of water.
Q. Can I take levothyroxine with vitamins?
Levothryroxine can be taken with vitamins. No drug-drug interactions have been reported between the two. However, this does not mean that interactions cannot occur. Please consult your doctor before taking the two medicines together.
Q. Can I take levothyroxine with juice?
There are no particular studies regarding the use of thyroxine with juice. However, it is recommended that levothyroxine tablets should be taken before breakfast or your first meal of the day. Levothyroxine tablets should be swallowed with plenty of water.
Q. Can I take levothyroxine with antibiotics?
Some antibiotics can lead to drug-drug interaction when taken with levothyroxine. Please consult your doctor before taking any antibiotic along with levothyroxine.
Q. Can I take levothyroxine with paroxetine?
Levothyroxine can be taken with paroxetine. No drug-drug interactions have been reported between the two. However, this does not mean that interactions cannot occur. Please consult your doctor before taking the two medicines together.
Q. Can I take levothyroxine with doxycycline?
Levothyroxine can be taken with doxycycline. No drug-drug interactions have been reported between the two. However, this does not mean that interactions cannot occur. Please consult your doctor before taking the two medicines together.
Q. Can I take levothyroxine with metformin?
Levothyroxine may cause an increase in dosage requirements of metformin. Care is needed if you are suffering from diabetes mellitus. Please consult your doctor before taking the two medicines together.
Q. Does thyroxine increase blood pressure?
An increase in blood pressure can occur with excessive doses of thyroxine. It should be used with caution in patients with hypertension. Also, thyroxine can interact with certain medicines used for the treatment of hypertension leading to an increase in blood pressure. Please consult your doctor in case you experience symptoms of high blood pressure while taking thyroxine or you are a hypertensive and you are prescribed thyroxine.
Q. Does thyroxine cause weight loss?
Weight loss has been reported as a side effect of thyroxine. Please tell your doctor if you experience excessive weight loss with thyroxine. However, you must not change the dose or stop the tablets without talking to your doctor first.
Q. Does thyroxine cause hair loss?
Temporary hair loss in children has been reported as a side effect with thyroxine. Most of the side effects are similar to the symptoms of hyperthyroidism (where the thyroid gland makes too much thyroxine) and are due to your dose of the medicine being too high. They will usually disappear after decreasing the dose or when you stop taking the tablets. However, you must not change the dose or stop the tablets without talking to your doctor first.
Q. Does thyroxine cause weight gain?
Thyroxine can cause weight loss as a side effect. Weight gain has not been observed with thyroxine. Weight gain is usually a symptom of hypothyroidism (when the thyroid gland does not produce enough thyroxine). Levothyroxine tablets are used to replace the thyroxine that your thyroid gland cannot produce and prevent the symptoms of hypothyroidism (which includes weight gain).
Q. Does thyroxine speed up metabolism?
Thyroxine is a hormone which is produced naturally in the body by the thyroid gland. The main action of thyroxine is to increase the rate of metabolism in the body. When the thyroid gland does not produce enough thyroxine (a condition known as hypothyroidism), many of the body’s functions slow down. Thyroxine tablets are used to replace the thyroxine that your thyroid gland cannot produce and prevent the symptoms of hypothyroidism.
Q. Does thyroxine cause depression?
Thyroxine is not known to cause depression. Depression is usually a symptom of hypothyroidism (when the thyroid gland does not produce less amount of thyroxine). Levothyroxine tablets are used to replace the thyroxine that your thyroid gland cannot produce and prevent the symptoms of hypothyroidism (which includes depression).
Q. Does thyroxine have side effects?
Yes, thyroxine has side effects. All medicine can lead to certain side effects. Common side effects of thyroxine are - enlarged thyroid gland, increased heart rate, goiter, insomnia, altered heart rate, abdominal pain, fever, diarrhoea, irregular menstrual cycle, increased blood pressure, chest pain, nervousness, tremor. Please consult your doctor to know more about the side effects caused by thyroxine.
Q. Does thyroxine cause nausea?
Thyroxine has not been reported to cause nausea. Please consult your doctor if you experience nausea while taking thyroxine.
Q. Does thyroxine help to lose weight?
Thyroxine can cause weight loss as a side effect. Most of the side effects are similar to the symptoms of hyperthyroidism (where the thyroid gland makes too much thyroxine) and are due to your dose of the medicine being too high. Weight loss could also be due to the normalization of your thyroid hormones. Thyroxine is not indicated to be used for weight loss.

Content on this page was last updated on 27 April, 2017, by Dr. Varun Gupta (MD Pharmacology)