Lethyrox is a medication that contains levothyroxine, a synthetic form of the thyroid hormone thyroxine. It is used to treat conditions where the thyroid gland does not produce enough hormones, a condition known as hypothyroidism. By replacing the missing hormone, Lethyrox helps restore normal metabolism and energy levels in the body. It is usually taken once daily and is often required as a lifelong treatment.

Mechanism of Action:
Levothyroxine works by mimicking the natural thyroid hormone thyroxine, also known as T4. After entering the bloodstream, it is converted into the more active form called T3. These hormones regulate the speed of many body functions, including metabolism, heart rate, and temperature control. When the body has enough thyroid hormone, it functions more normally. Lethyrox helps correct the hormone imbalance and brings the body back into a stable, healthy state.

Uses:
Lethyrox is mainly prescribed for:

• Treating hypothyroidism, where the thyroid gland is underactive

• Supporting recovery after thyroid surgery or radiation therapy

• Managing certain types of thyroid cancer as part of hormone suppression therapy

• Treating goiter or thyroid enlargement caused by hormone deficiency

  Adverse Effects:
  When taken at the correct dose, Lethyrox is generally well tolerated. However, if the dose is too high, it may cause symptoms similar to an overactive thyroid. These can include:

  • Fast or irregular heartbeat

  • Nervousness, anxiety, or irritability

  • Sweating, weight loss, or feeling too warm

  • Difficulty sleeping or tremors

  • Headache or fatigue