Product image of Medirazin (Alfacalcidol) supplied by GNH India

Medirazin

Active Ingredient:
Alfacalcidol
Origin:
EU

Medirazin (Alfacalcidol)

Alfacalcidol, the active ingredient in Medirazin, is a vitamin D analog presented as an oral formulation for oral use. It treats secondary hyperparathyroidism, renal osteodystrophy and hypocalcemia in patients with chronic kidney disease.

GNH India supplies Medirazin as a licensed, GDP-compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Zentiva, K.S.

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Indications & Clinical Uses

Medirazin (alfacalcidol) is used to manage disorders of calcium metabolism related to kidney disease.

  • Secondary hyperparathyroidism: helps lower elevated parathyroid hormone levels and improve calcium balance.
  • Renal osteodystrophy: supports bone mineralization by increasing calcium and phosphate absorption.
  • Hypocalcemia: raises serum calcium concentrations in patients with low calcium due to renal impairment.

How It Works

  • Alfacalcidol is converted in the liver to calcitriol, the active form of vitamin D3. Calcitriol binds to vitamin D receptors in intestinal cells, enhancing transcription of calcium‑binding proteins, which increases absorption of calcium and phosphate from the gut and modulates bone remodeling processes.

Side Effects

Common Side Effects

  • Nausea: mild gastrointestinal discomfort may occur.
  • Vomiting: occasional episodes reported.
  • Constipation: reduced bowel movements are possible.
  • Hypercalcemia symptoms: mild fatigue or thirst.
  • Headache: transient head pain.
  • Fatigue: general tiredness.

Serious or Rare Side Effects

  • Severe hypercalcemia: can lead to cardiac arrhythmia.
  • Hyperphosphatemia: elevated phosphate levels.
  • Renal stones: calcium deposits in kidneys.
  • Allergic reactions: rash, itching, or swelling.
  • Cardiac arrhythmia: irregular heart rhythm.
  • Anaphylaxis: rare but life‑threatening hypersensitivity.

Precautions & Warnings

Before initiating therapy, clinicians should consider several safety measures.

  • Monitor serum calcium and phosphate: regular laboratory testing is recommended.
  • Assess parathyroid hormone levels: adjust therapy based on PTH trends.
  • Use caution in patients with granulomatous disease: risk of hypercalcemia.
  • Avoid in hypervitaminosis D: may exacerbate calcium overload.
  • Pregnancy and lactation: safety not established; use only if clearly needed.
  • Store at ambient temperature: keep below 25°C, protect from moisture and light.

Avoid Interactions

Alfacalcidol may interact with several medications that affect calcium balance.

Major Interactions (Avoid)

  • Calcium supplements: may cause excessive calcium levels.
  • Vitamin D analogs (calcitriol, ergocalciferol): additive hypercalcemia risk.
  • Thiazide diuretics: increase calcium reabsorption, raising hypercalcemia risk.

Moderate Interactions (Monitor Closely)

  • CYP24A1 inhibitors: may increase alfacalcidol exposure.
  • Anticonvulsants (phenytoin, phenobarbital): may reduce effectiveness.
  • Bisphosphonates: concurrent use may affect calcium dynamics.

Frequently Asked Questions

Medirazin contains alfacalcidol and is prescribed to manage calcium‑related disorders such as secondary hyperparathyroidism, renal osteodystrophy, and hypocalcemia, particularly in patients with chronic kidney disease.

Alfacalcidol is converted in the liver to calcitriol, the active form of vitamin D3. Calcitriol binds to vitamin D receptors, increasing intestinal absorption of calcium and phosphate and influencing bone remodeling.

The appropriate dose of Medirazin is determined by the prescribing clinician based on the patient’s laboratory values, underlying condition, and response to therapy. No fixed regimen is provided here.

Safety data for alfacalcidol during pregnancy and lactation are limited. It should only be used if the potential benefit justifies the potential risk to the fetus or infant, and under close medical supervision.

To order Medirazin, 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 necessary import documentation.

Medirazin (alfacalcidol) is a synthetic vitamin D analog that requires hepatic activation, unlike calcitriol which is already active. This can provide a more gradual increase in active vitamin D levels, potentially offering a different safety profile in certain renal patients.

Medirazin should be stored at ambient temperature, below 25 °C, in its original packaging to protect it from moisture and light. Keep the container tightly closed and out of reach of children.

Medirazin is taken orally, usually with or without food, as directed by the prescribing physician. The tablet should be swallowed whole with a glass of water and not crushed or chewed unless specifically instructed.

The most serious risks include severe hypercalcemia, which can cause cardiac arrhythmias, renal stone formation, and in rare cases, anaphylactic reactions. Patients should be monitored regularly for signs of elevated calcium levels.

Medirazin should be avoided in patients with known hypersensitivity to alfacalcidol or other vitamin D analogs, those with hypervitaminosis D, uncontrolled hypercalcemia, or granulomatous diseases such as sarcoidosis unless closely monitored.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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