Endocrine

Thyroid Drugs
Types of Thyroid Medications

  • Levothyroxine:

    • Used for hypothyroidism; synthetic form of thyroxine (T4).

    • Helps to restore normal thyroid hormone levels.

  • Liothyronine:

    • Synthetic form of triiodothyronine (T3).

    • Often used in cases where a rapid response is needed, or if the patient does not convert T4 to T3 effectively.

  • Thyroid Desiccated:

    • Natural product derived from porcine thyroid glands, contains both T3 and T4.

    • Some patients prefer this over synthetic options due to a belief in more balanced hormone levels.

Indications for Use

  • Hypothyroidism

  • Goiter

  • Thyroid cancer (as part of treatment)

  • Certain cases of myxedema coma

Monitoring and Adjustments

  • Regular monitoring of thyroid function tests (TFTs) is essential to ensure proper dosing and to avoid complications such as thyrotoxicosis.

  • Doses may need to be adjusted based on weight changes, pregnancy, age, and other health conditions.

Side Effects

  • Signs of over-medication include symptoms of hyperthyroidism:

    • Increased heart rate

    • Anxiety

    • Weight loss

    • Heat intolerance

  • Signs of under-medication include symptoms:

    • Fatigue

    • Weight gain

    • Depression