Thyronor 100

Presentation:Each tablet contains 100 mcg of levothyroxine sodium.

Indications:Thyronor 100 is indicated for hormone replacement therapy in hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormone.It is used in:

• Primary hypothyroidism (due to thyroid gland dysfunction).
• Secondary hypothyroidism (due to pituitary gland dysfunction).  
• Tertiary hypothyroidism (due to hypothalamus dysfunction).
• Suppression of thyroid hormone production in the management of certain thyroid cancers.
• Treatment of non-toxic goiter.  

Dosage and Administration: Thyronor 100 tablets are for oral administration and should be taken once daily, preferably on an empty stomach, 30 minutes to one hour before breakfast, to ensure consistent absorption. The tablet should be swallowed whole with water.  

The dosage is highly individualized and depends on the patient's age, weight, clinical response, and thyroid function tests (serum thyroid-stimulating hormone [TSH] and thyroxine [T4] levels).  

• Adults: The initial dose may range from 25 mcg to 100 mcg daily, with adjustments made every 4-6 weeks based on clinical and laboratory assessment. The usual maintenance dose is 100 mcg to 200 mcg daily.
• Elderly: Treatment should be initiated at a lower dose, such as 25 mcg daily, with gradual increases to avoid precipitating cardiac problems.
• Children: The starting dose depends on body weight and age, and maintenance doses are also weight-based.
• Neonates and Infants: Initial doses are higher and adjusted based on TSH and T4 levels.
• Patients with Cardiovascular Disease: A lower starting dose (e.g., 12.5 mcg or 25 mcg daily) with slower titration is recommended.
• Patients with Severe Hypothyroidism: A lower starting dose is also recommended to avoid cardiac overload.

Dosage adjustments should be guided by regular monitoring of TSH levels. The aim is to normalize TSH within the target range for the individual patient.

Side Effects: Side effects of levothyroxine are usually associated with hyperthyroidism due to excessive dosage. These may include palpitations, tachycardia, nervousness, irritability, insomnia, tremor, headache, sweating, weight loss, increased appetite, diarrhea, heat intolerance, and menstrual irregularities. Chest pain or worsening of angina may occur in patients with pre-existing cardiovascular disease.

Hypersensitivity reactions, such as skin rash and urticaria, are rare.

Precautions: Thyronor 100 should be used with caution in patients with pre-existing cardiovascular disease, especially angina pectoris or coronary artery disease, as thyroid hormone can increase myocardial oxygen demand. Lower starting doses and slower titration are recommended in these patients.

Caution is also advised in patients with adrenal insufficiency, as thyroid hormone replacement may precipitate an acute adrenal crisis. Concomitant glucocorticoid therapy may be necessary.

Changes in thyroid status may affect the dosage requirements of other medications, such as anticoagulants (warfarin) and insulin or oral hypoglycemic agents. Careful monitoring and adjustment of these medications may be necessary.

During pregnancy, thyroid hormone requirements often increase, and TSH levels should be monitored closely. Levothyroxine is considered safe for use during breastfeeding.

Inform healthcare professionals about all other medications being taken, including over-the-counter drugs and herbal supplements, as interactions may occur that can affect the absorption, metabolism, or efficacy of levothyroxine.

Storage: Store at room temperature (15°C to 30°C), protected from light and moisture. Keep out of reach of children. Do not use after the expiry date.

Important Note: This information is for general knowledge and informational purposes only, and does not substitute professional medical advice. Thyroid hormone replacement therapy requires careful medical supervision and regular monitoring of thyroid function tests. Always consult your doctor for specific instructions and guidance regarding this medication.