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Euthyrox 12.5mcg Tablet

Merck Ltd

Information updated 17 April 2026

Thyroxine (12.5mcg) 167.12

Euthyrox 12.5mcg Tablet: A Patient Guide

Overview Euthyrox 12.5mcg Tablet is a medication containing the hormone thyroxine (T4), which is used to treat hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormone. This medication is manufactured by Merck Ltd and is available in a tablet form.

Uses Euthyrox 12.5mcg Tablet is used to treat the following conditions:

  • Hypothyroidism: a condition where the thyroid gland does not produce enough thyroid hormone, leading to symptoms such as fatigue, weight gain, and cold intolerance.
  • General health: to maintain normal thyroid hormone levels in the body.

Mechanism of Action Thyroxine (T4) is a hormone produced by the thyroid gland that plays a crucial role in regulating metabolism, growth, and development. In patients with hypothyroidism, the thyroid gland does not produce enough T4, leading to a deficiency of thyroid hormone in the body. Euthyrox 12.5mcg Tablet replaces the deficient T4, helping to restore normal thyroid hormone levels in the body.

Dosage The dosage of Euthyrox 12.5mcg Tablet will be determined by your doctor based on your individual needs. It is essential to follow the dosage instructions provided by your doctor and not to adjust the dosage without consulting them. The typical dosage range for Euthyrox 12.5mcg Tablet is:

  • Adult patients: 12.5-200 mcg per day, taken once daily in the morning.
  • Pediatric patients: 6-12.5 mcg per kg per day, taken once daily in the morning.

Side Effects Common side effects of Euthyrox 12.5mcg Tablet may include:

  • Nausea and vomiting
  • Headache
  • Fatigue
  • Weight loss
  • Hair loss
  • Increased sweating
  • Palpitations
  • Changes in menstrual cycle

Serious side effects of Euthyrox 12.5mcg Tablet may include:

  • Allergic reactions (such as hives, itching, and difficulty breathing)
  • Thyroid storm (a life-threatening condition caused by an overactive thyroid gland)
  • Bone loss (osteoporosis)

Precautions Before taking Euthyrox 12.5mcg Tablet, inform your doctor if you have any of the following conditions:

  • Thyroid nodules or tumors
  • Thyroid cancer
  • Kidney or liver disease
  • Heart problems
  • Pregnancy or breastfeeding
  • History of thyroid surgery or radiation therapy

FAQs

Q: What happens if I miss a dose of Euthyrox 12.5mcg Tablet? A: If you miss a dose of Euthyrox 12.5mcg Tablet, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule.

Q: Can I take Euthyrox 12.5mcg Tablet if I am pregnant or breastfeeding? A: It is essential to inform your doctor if you are pregnant or breastfeeding before taking Euthyrox 12.5mcg Tablet. Your doctor will determine the safety and efficacy of this medication for you.

Q: How long does it take for Euthyrox 12.5mcg Tablet to start working? A: It may take several weeks for Euthyrox 12.5mcg Tablet to start working. Your doctor will monitor your thyroid hormone levels regularly to adjust the dosage as needed.

Uses

  • General Health

Side Effects

  • Consult Doctor

Have questions about Euthyrox 12.5mcg Tablet?

Talk to a verified specialist who can guide you on dosage, alternatives, and interactions.

Safety Advice

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pregnancy

Consult Doctor

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alcohol

Caution

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driving

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