Oroxine (Levothyroxine Sodium Pentahydrate)

Levothyroxine sodium pentahydrate, the active ingredient in Oroxine, is a thyroid hormone replacement presented as a tablet for oral use. It treats hypothyroidism by supplying the body with a synthetic form of the thyroid hormone thyroxine, helping to normalize metabolic processes in patients with thyroid hormone deficiency.

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

Oroxine (levothyroxine) is used within the endocrine therapeutic area to restore normal thyroid hormone levels. - Primary hypothyroidism: normalizes thyroid hormone concentrations and alleviates symptoms such as fatigue and weight gain. - Secondary (central) hypothyroidism: provides needed hormone replacement when the pituitary gland fails to stimulate the thyroid. - Congenital hypothyroidism: ensures adequate thyroid hormone for growth and neurodevelopment in affected infants.

Adverse reactions to levothyroxine are generally dose‑related and may affect multiple organ systems.

Common Side Effects: - Palpitations: sensation of rapid or irregular heartbeat. - Nervousness or anxiety: heightened nervous system activity. - Tremor: fine shaking of the hands. - Heat intolerance: increased sensitivity to warm environments. - Weight loss: unintended reduction in body weight. - Menstrual irregularities: changes in cycle timing or flow.

Serious or Rare Side Effects: - Cardiac arrhythmias: potentially life‑threatening rhythm disturbances. - Osteoporosis: decreased bone mineral density with long‑term overtreatment. - Acute allergic reactions: rash, itching, or swelling. - Hyperthyroid crisis (thyrotoxicosis): severe over‑replacement symptoms requiring urgent care.

Levothyroxine requires careful monitoring and individualized dosing to avoid over‑ or under‑replacement. - Baseline assessment: obtain thyroid function tests before initiating therapy. - Dose adjustments: modify based on periodic TSH and free T4 measurements. - Drug interactions: review concomitant medications that may alter absorption or metabolism. - Pregnancy and lactation: monitor thyroid status closely, as requirements may change. - Cardiovascular disease: start with low doses and titrate cautiously. - Store at ambient temperature: keep tablets in the original container, protect from moisture and direct sunlight.

Levothyroxine may have clinically significant interactions with several drug classes.

Major Interactions (Avoid): - Antacids containing aluminum or magnesium: reduce levothyroxine absorption; separate dosing by at least 4 hours. - Iron supplements: markedly decrease absorption; separate dosing by at least 4 hours. - Corticosteroids (high dose): may increase levothyroxine clearance, necessitating dose adjustment.

Moderate Interactions (Monitor Closely): - Cholesterol‑lowering agents (e.g., cholestyramine, colestipol): may modestly reduce absorption. - Antidepressants (SSRIs, tricyclics): can affect thyroid hormone levels. - Oral contraceptives and hormone replacement therapy: may increase levothyroxine requirements.