Levothyroxine Zentiva Pharma

Levothyroxine Sodium, the active ingredient in Levothyroxine Zentiva Pharma, is a thyroid hormone presented as an oral tablet for oral use. It treats hypothyroidism, goiter and provides hormone replacement after thyroidectomy.

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

Levothyroxine is a synthetic thyroid hormone used to manage disorders of thyroid hormone deficiency.

- Hypothyroidism: restores normal thyroid hormone levels and alleviates symptoms such as fatigue, weight gain and cold intolerance. - Goiter: reduces thyroid‑stimulating hormone stimulation, helping to shrink an enlarged thyroid gland. - Post‑thyroidectomy (thyroid cancer): provides necessary hormone replacement after surgical removal of the thyroid gland.

Levothyroxine may cause a range of adverse reactions, varying from mild to serious.

Common Side Effects: - Headache: mild, transient headache. - Insomnia: difficulty falling or staying asleep. - Palpitations: awareness of a rapid or irregular heartbeat. - Nausea: mild gastrointestinal upset.

Serious or Rare Side Effects: - Cardiac arrhythmia: potentially life‑threatening irregular heart rhythm. - Hyperthyroidism: excessive hormone effect causing heat intolerance, tremor and weight loss. - Allergic reaction: rash, swelling, or anaphylaxis requiring immediate medical attention.

When prescribing levothyroxine, clinicians should consider several safety measures.

- Dose titration: adjust dose based on thyroid function tests and clinical response. - Cardiovascular disease: monitor closely in patients with heart disease or arrhythmias. - Pregnancy: use only if benefits outweigh risks; consult a healthcare provider. - Elderly patients: start with a lower dose and monitor for overtreatment. - Drug interactions: review concomitant medications that may affect levothyroxine absorption. - Store at room temperature: keep in the original container, protect from moisture and light.

Levothyroxine absorption and activity can be altered by several medicines; some combinations should be avoided while others require monitoring.

Major Interactions (Avoid): - Calcium supplements: bind levothyroxine and reduce its absorption. - Iron salts: significantly decrease oral bioavailability. - Proton pump inhibitors: may delay absorption, requiring dose adjustment.

Moderate Interactions (Monitor Closely): - Antiepileptic drugs (e.g., phenytoin, carbamazepine): increase metabolism, lowering effectiveness. - Cholestyramine: reduces absorption when taken concurrently. - Warfarin: levothyroxine may enhance anticoagulant effect, requiring INR monitoring.