Levothyroxine Sodium

Levothyroxine Sodium, the active ingredient in Levothyroxine Sodium, is a synthetic thyroid hormone presented as an oral tablet for oral use. It replaces deficient endogenous thyroxine (T4) and is prescribed for patients with hypothyroidism, goiter, or as part of thyroid cancer suppression therapy. The medication restores normal metabolic activity and protein synthesis, helping to regulate body temperature, heart rate, and energy levels.

GNH USA supplies Levothyroxine Sodium as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Levothyroxine Sodium is used to treat disorders of thyroid hormone deficiency and related conditions.

- Hypothyroidism: restores normal thyroid hormone levels and alleviates symptoms such as fatigue, weight gain, and cold intolerance. - Goiter: reduces thyroid gland enlargement by normalizing hormone feedback. - Thyroid cancer suppression: provides hormone replacement to suppress TSH stimulation after thyroidectomy.

Levothyroxine Sodium may cause a range of adverse reactions, which are generally dose‑related.

Common Side Effects: - Headache: mild to moderate headache. - Nervousness: feelings of anxiety or jitteriness. - Insomnia: difficulty falling or staying asleep. - Weight loss: unintended reduction in body weight. - Palpitations: awareness of rapid or irregular heartbeat.

Serious or Rare Side Effects: - Cardiac arrhythmia: abnormal heart rhythm that may require medical attention. - Angina pectoris: chest pain due to reduced coronary blood flow. - Osteoporosis: decreased bone mineral density with long‑term overtreatment. - Allergic reaction: rash, itching, swelling, or difficulty breathing. - Hyperthyroidism symptoms: excessive sweating, tremor, or heat intolerance.

When prescribing Levothyroxine Sodium, clinicians should consider several safety considerations. - Dose adjustment: titrate based on serum TSH and free T4 levels. - Cardiovascular disease: monitor patients with angina, arrhythmias, or recent myocardial infarction. - Osteoporosis risk: use the lowest effective dose in patients at risk for bone loss. - Pregnancy and lactation: evaluate benefits versus risks and adjust dosing as needed. - Drug interactions: review concomitant medications that may alter absorption or metabolism. - Store at room temperature: keep below 25 °C, protect from moisture and light in the original container.

Levothyroxine Sodium can interact with several medicines, affecting its absorption or activity.

Major Interactions (Avoid): - Calcium supplements: reduce levothyroxine absorption; separate dosing by at least 4 hours. - Iron salts: markedly decrease absorption; separate dosing by at least 4 hours. - Proton pump inhibitors: may lower absorption; monitor thyroid function. - Antacids containing aluminum or magnesium: interfere with uptake; separate dosing. - Certain anticonvulsants (e.g., phenytoin, carbamazepine): increase metabolism leading to reduced efficacy.

Moderate Interactions (Monitor Closely): - Warfarin: levothyroxine may enhance anticoagulant effect; monitor INR. - Beta‑blockers: may mask symptoms of hyperthyroidism; observe clinical response. - Cholesterol‑lowering agents (e.g., cholestyramine): decrease absorption; adjust levothyroxine dose if needed.