L-Thyrox (Levothyroxine Sodium)

Levothyroxine sodium is a synthetic form of the natural thyroid hormone T4. After oral absorption, it is converted to the active hormone T3 in peripheral tissues. These hormones bind to nuclear receptors, regulating gene expression and increasing basal metabolic rate, thereby normalising systemic thyroid hormone levels.

The appropriate dose of L-Thyrox is individualized and determined by the prescribing clinician based on the patient’s age, weight, severity of thyroid deficiency, and laboratory results. Dosage adjustments are made by monitoring thyroid‑stimulating hormone (TSH) and free T4 levels.

Levothyroxine is generally considered safe in pregnancy and lactation when prescribed by a healthcare professional, as untreated hypothyroidism poses greater risks to both mother and fetus. However, dosing may need adjustment, and therapy should be managed under medical supervision.

To place an order, submit an enquiry on the product page at gnhindia.com, specifying the required quantity. GNH India works with hospitals, pharmacies and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details and any necessary import documentation.

L-Thyrox contains levothyroxine sodium, the same active ingredient found in most branded and generic thyroid hormone preparations. Its efficacy and safety profile are comparable, with differences mainly in formulation, regulatory status, and manufacturer. Choice often depends on availability, cost and local prescribing preferences.

L-Thyrox tablets should be stored at temperatures below 25 °C, in the original container, protected from moisture and direct sunlight. Keeping the product in a dry, cool place helps maintain potency throughout its shelf life.

L-Thyrox is taken orally, usually once daily on an empty stomach, at least 30 minutes before breakfast. The tablet should be swallowed whole with a glass of water and not crushed or chewed, unless otherwise directed by a healthcare professional.

Serious risks include cardiac arrhythmias, angina, severe allergic reactions, and overtreatment leading to hyperthyroidism, which can cause bone loss and muscle weakness. Patients should be monitored regularly for symptoms and have thyroid function tests performed as advised by their clinician.

L-Thyrox is contraindicated in patients with untreated adrenal insufficiency, acute myocardial infarction, or known hypersensitivity to levothyroxine or any excipients in the tablet. It should also be used with caution in individuals with cardiovascular disease, the elderly, and those with a history of thyroid hormone intolerance.