Levothyroxine: A Thyroid Medication

Overview

• Levothyroxine is a synthetic thyroid hormone, commonly known by the brand name Synthroid.
• Used for patients with hypothyroidism (low thyroid hormone levels) and as hormone replacement after a thyroidectomy (removal of the thyroid gland).
• Memory tricks:
  • Levothyroxine = looks like thyroid
  • Synthroid = synthetic thyroid

Mechanism of Action

• The thyroid gland produces hormones such as T3 (triiodothyronine) and T4 (thyroxine).
• Levothyroxine replaces or mimics the hormone thyroxine (T4).

Side Effects

• Can lead to hyperthyroidism if the medication exerts too much effect.
• Symptoms include:
  • Increased energy (nervousness, tremors)
  • Increased blood pressure and pulse
  • Increased GI function (e.g., diarrhea)
  • Increased metabolism (resulting in weight loss)
  • Increased temperature, hot sensation

Therapeutic Response

• Indicators of effective medication:
  • Improved mood
  • Improved energy levels
  • Normal vital signs

Patient Education

• Do not stop taking the medication if symptoms resolve.
  • Important for pregnant women, as thyroid hormone is crucial for fetal development.
• Administration instructions:
  • Take once a day, in the morning, at the same time.
  • Take 30 minutes before a meal on an empty stomach.
• Medication adherence:
  • Full effect may take up to 8 weeks.
  • Lifelong therapy: patients will be on it for life.
  • Memory trick: Levothyroxine = Lifelong therapy.

Additional Resources

• For more information and a detailed breakdown of medications, refer to complete pharmacology flashcards.

Happy studying, future nurses!