Product image of Natpar (Parathyroid Hormone) supplied by GNH India

Natpar

Active Ingredient:
Parathyroid Hormone
Origin:
EU

Natpar (Parathyroid Hormone)

Parathyroid Hormone, the active ingredient in Natpar, is a hormone presented as an injectable solution for subcutaneous use. It treats hypoparathyroidism by restoring physiologic calcium regulation in patients with deficient endogenous PTH.

GNH India supplies Natpar as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, transplant centres and pharmacies worldwide, adhering to EU manufacturing standards and providing reliable cold‑chain logistics for injectable biologics. The company ensures product integrity through rigorous quality control and regulatory compliance.

Manufacturer / TM Owner

Takeda Pharmaceuticals International Ag Ireland Branch

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Indications & Clinical Uses

  • Natpar is used to manage disorders of calcium metabolism, primarily hypoparathyroidism.
  • Hypoparathyroidism: restores serum calcium levels and reduces symptoms of hypocalcemia in patients with deficient endogenous PTH.
  • Post‑surgical hypoparathyroidism: helps maintain calcium balance after thyroid or parathyroid surgery.
  • Chronic hypoparathyroidism: provides long‑term calcium homeostasis for patients requiring ongoing hormone replacement.

How It Works

  • Parathyroid hormone binds to PTH1 receptors on osteoblasts, renal tubular cells, and intestinal epithelium, triggering intracellular signaling that increases bone resorption, enhances renal calcium reabsorption, and stimulates activation of vitamin D, thereby raising serum calcium concentrations to physiologic levels.

Side Effects

Natpar may cause a range of adverse reactions, which are categorized by frequency and severity.

Common Side Effects

  • Injection site pain or erythema
  • Nausea
  • Headache
  • Dizziness
  • Mild hypercalcemia
  • Fatigue

Serious or Rare Side Effects

  • Severe hypercalcemia
  • Hypersensitivity reactions, including anaphylaxis
  • Osteosarcoma (rare)
  • Cardiovascular events such as arrhythmia
  • Acute renal failure
  • Severe hypotension

Precautions & Warnings

When prescribing Natpar, clinicians should observe several safety measures to minimize risk.

  • Monitor serum calcium: check levels regularly to avoid hypercalcemia.
  • Assess renal function: evaluate kidney status before and during therapy.
  • Evaluate for hyperparathyroidism: avoid use in patients with active hyperparathyroidism.
  • Use caution with vitamin D analogues: may increase calcium levels.
  • Avoid in known hypersensitivity: discontinue if allergic reaction occurs.
  • Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Avoid Interactions

Natpar can interact with other agents that affect calcium balance or bone metabolism.

Major Interactions (Avoid)

  • Loop diuretics: may cause excessive calcium increase.
  • High‑dose vitamin D analogues: risk of severe hypercalcemia.
  • Bisphosphonates: may blunt therapeutic effect on bone.

Moderate Interactions (Monitor Closely)

  • Calcium supplements: require dose adjustment.
  • Magnesium supplements: can affect PTH activity.
  • Antacids containing aluminum or magnesium: may interfere with absorption.
  • Corticosteroids: may alter calcium metabolism.

Frequently Asked Questions

Natpar is indicated for the treatment of hypoparathyroidism, a condition where the body produces insufficient parathyroid hormone. By providing exogenous hormone, Natpar helps normalize serum calcium levels and alleviates symptoms such as muscle cramps, tingling, and seizures associated with low calcium.

Parathyroid hormone binds to PTH1 receptors on bone, kidney, and intestinal cells. This activation stimulates bone resorption to release calcium, increases renal tubular reabsorption of calcium, and promotes activation of vitamin D, which enhances intestinal calcium absorption, collectively raising blood calcium to normal ranges.

The dosing regimen for Natpar is individualized. A qualified prescriber determines the appropriate dose, frequency, and titration based on the patient’s serum calcium levels, clinical response, and overall health status. Specific dosing information should be obtained from the prescribing healthcare professional.

Safety data for Natpar in pregnancy and lactation are limited. The product’s pregnancy category is unknown, and it should only be used if the potential benefit justifies any potential risk to the fetus or infant. Clinicians should discuss risks and alternatives with the patient.

To request Natpar, 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, cold‑chain shipping details, and necessary import documentation.

The primary alternatives for hypoparathyroidism are active vitamin D analogues (e.g., calcitriol) and oral calcium supplements. Unlike those agents, Natpar directly replaces deficient parathyroid hormone, offering more precise control of calcium homeostasis. However, it requires subcutaneous injection and cold‑chain handling, whereas oral agents are easier to administer.

Natpar must be stored refrigerated at 2‑8 °C. Keep the vial in its original packaging, protect it from light, and avoid freezing or shaking. If temperature excursions occur, discard the product according to the supplier’s stability guidelines.

Natpar is administered as a subcutaneous injection, typically into the abdomen or thigh. The solution is supplied ready‑to‑use; if reconstitution is required, follow the manufacturer’s instructions using aseptic technique. Injections are performed by a qualified healthcare professional or trained patient under supervision.

Serious risks include severe hypercalcemia, which can cause cardiac arrhythmias, renal impairment, or neurological symptoms; hypersensitivity reactions such as anaphylaxis; and, rarely, osteosarcoma. Patients should be monitored regularly for calcium levels and any signs of allergic response or bone pain.

Natpar is contraindicated in individuals with known hypersensitivity to parathyroid hormone or any excipients, patients with active hyperparathyroidism, severe hypercalcemia, or uncontrolled renal disease. Caution is also advised for those with a history of osteosarcoma or other bone malignancies.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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