Product image of Leuzek (Imatinib) supplied by GNH India

Leuzek

Active Ingredient:
Imatinib
Origin:
EU

Leuzek (Imatinib)

Imatinib, the active ingredient in Leuzek, is a tyrosine kinase inhibitor presented as an oral formulation for oral use. It is used to treat certain cancers by blocking specific cellular enzymes that drive tumor growth.
GNH India supplies Leuzek as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, oncology centres, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Nobilus Ent Tomasz Koźluk

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Indications & Clinical Uses

Imatinib acts on malignant cells that depend on BCR‑ABL, c‑KIT or PDGFR signaling pathways.

  • Chronic myeloid leukemia: provides disease control by inhibiting the BCR‑ABL fusion protein.
  • Gastrointestinal stromal tumor: induces tumor regression by blocking c‑KIT and PDGFR kinases.
  • Philadelphia chromosome‑positive acute lymphoblastic leukemia: offers therapeutic benefit by targeting BCR‑ABL driven proliferation.

How It Works

  • Imatinib binds competitively to the ATP‑binding site of several tyrosine kinases, including BCR‑ABL, c‑KIT, and PDGFR. This inhibition prevents phosphorylation of downstream substrates, halting signal transduction that promotes cell proliferation and survival, thereby inducing apoptosis in malignant cells that rely on these pathways.

Side Effects

Imatinib may cause a range of adverse reactions.

Common Side Effects

  • Nausea: mild to moderate gastrointestinal upset.
  • Edema: swelling of the extremities, especially ankles.
  • Muscle cramps: intermittent painful contractions.
  • Fatigue: persistent lack of energy.

Serious or Rare Side Effects

  • Severe neutropenia: marked reduction in white blood cells.
  • Hepatotoxicity: elevated liver enzymes or liver injury.
  • Cardiac failure: signs of reduced heart function such as dyspnea.

Precautions & Warnings

Before initiating therapy, clinicians should consider several safety measures.

  • Monitor blood counts: perform regular CBC to detect neutropenia.
  • Assess liver function: check hepatic enzymes periodically.
  • Avoid strong CYP3A4 inhibitors: drugs like ketoconazole may increase exposure.
  • Use caution in patients with cardiac disease: monitor for signs of heart failure.
  • Pregnancy and breastfeeding: discuss potential risks with a healthcare professional.
  • Store at room temperature: keep in the original container, protect from moisture.

Avoid Interactions

Imatinib can interact with other medicines, altering its efficacy or safety.

Major Interactions (Avoid)

  • Strong CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin): may raise imatinib levels.
  • Antacids containing aluminum or magnesium: reduce absorption of the drug.
  • Concurrent use with other tyrosine kinase inhibitors: increases risk of toxicity.

Moderate Interactions (Monitor Closely)

  • CYP3A4 inducers (e.g., rifampin): may lower imatinib concentrations.
  • Warfarin: may require closer INR monitoring due to altered anticoagulant effect.

Frequently Asked Questions

Leuzek contains imatinib, which is indicated for chronic myeloid leukemia, gastrointestinal stromal tumor, and Philadelphia chromosome‑positive acute lymphoblastic leukemia. In each case, the drug targets abnormal tyrosine kinases that drive cancer cell growth.

Imatinib blocks the ATP‑binding sites of BCR‑ABL, c‑KIT, and PDGFR tyrosine kinases. By preventing these enzymes from phosphorylating downstream proteins, the drug stops the signaling pathways that promote uncontrolled cell division and survival, leading to cancer cell death.

The dose of Leuzek is individualized by the prescribing physician based on the specific indication, disease stage, patient weight, renal and hepatic function, and other clinical factors. Patients should follow the exact regimen provided by their healthcare professional.

Safety of imatinib during pregnancy or lactation has not been fully established. Women who are pregnant, planning to become pregnant, or breastfeeding should discuss potential risks and benefits with their physician before using Leuzek.

To order Leuzek, 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.

Leuzek (imatinib) belongs to the class of tyrosine kinase inhibitors and is often considered first‑line therapy for chronic myeloid leukemia and gastrointestinal stromal tumor. Compared with newer agents, it has a well‑characterized safety profile and extensive clinical experience, though individual response and tolerability may vary.

Leuzek should be stored at room temperature, below 25 °C, in its original packaging to protect it from moisture and light. Keep the product out of reach of children and do not use it after the expiration date.

Leuzek is taken orally, usually with a glass of water. The tablet should be swallowed whole and not crushed or chewed unless otherwise directed by a healthcare professional. Dosing times and any food restrictions are determined by the prescriber.

Serious risks include severe neutropenia, hepatotoxicity, and cardiac failure. Patients should be monitored regularly for blood count changes, liver enzyme elevations, and signs of heart dysfunction, and any concerning symptoms should be reported promptly to a clinician.

Leuzek is contraindicated in patients with known hypersensitivity to imatinib or any of its excipients. Caution is also advised for individuals with severe hepatic impairment, uncontrolled cardiac disease, or those taking medications that strongly interact with imatinib.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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