Levothyroxine: Uses, Dosage, Side Effects, and Precautions
Introduction Levothyroxine is a synthetic form of the thyroid hormone thyroxine (T4). It is commonly prescribed to treat hypothyroidism, a condition where the thyroid gland does not produce enough hormones. Thyroid hormones play a crucial role in regulating metabolism, energy levels, and overall body function. Uses of Levothyroxine 1. Treatment of hypothyroidism (underactive thyroid). 2. Used in patients with goiter (enlarged thyroid). 3. Prevents recurrence of thyroid cancer after surgery. 4. Helps in certain cases of Hashimoto’s thyroiditis. Dosage Dosage is individualized based on age, weight, and thyroid hormone levels. Typical adult dose: 25–200 mcg once daily, taken in the morning. Must be taken on an empty stomach, at least 30–60 minutes before breakfast. Side Effects (usually if dose is too high) Nervousness, anxiety Tremors Increased heart rate (palpitations) Insomnia Weight loss Heat intolerance Serious but rare side effects: Chest pain Severe headache Shortness of brea...