Product image of Nolvadex (Tamoxifen Citrate) supplied by GNH India

Nolvadex

Active Ingredient:
Tamoxifen Citrate
Origin:
EU

Nolvadex (Tamoxifen Citrate)

Tamoxifen citrate, the active ingredient in Nolvadex, is a selective estrogen receptor modulator (SERM) presented as an oral tablet for oral use. It is employed in the treatment and prevention of estrogen receptor‑positive breast cancer and related hormone‑driven conditions in adult patients. It is indicated for both adjuvant and metastatic settings, as well as for risk reduction in high‑risk populations.

GNH India supplies Nolvadex as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, oncology centres, pharmacies and clinics worldwide. The company adheres to stringent quality standards and provides regulatory‑approved batches to meet global demand.

Manufacturer / TM Owner

Astrazeneca S.A. / N.V.

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Indications & Clinical Uses

Tamoxifen citrate (Nolvadex) targets estrogen‑dependent breast cancer pathways.

  • Estrogen receptor‑positive breast cancer (adjuvant therapy): reduces recurrence risk after surgery.
  • Metastatic breast cancer: slows disease progression in advanced stages.
  • Prevention of breast cancer in high‑risk women: lowers incidence of new tumors.
  • Gynecomastia: treats hormone‑related breast tissue growth in men.

How It Works

  • Tamoxifen citrate binds competitively to estrogen receptors in breast tissue, acting as an antagonist that blocks estrogen‑driven cell proliferation. In bone and uterine tissue it exhibits partial agonist activity, preserving bone density while minimally stimulating uterine lining. The drug’s selective modulation disrupts estrogen signaling pathways, thereby inhibiting growth of estrogen‑dependent tumors.

Side Effects

Tamoxifen citrate may cause a range of adverse reactions, varying in frequency and severity.

Common Side Effects

  • Hot flashes: sudden feeling of warmth and sweating.
  • Nausea: upset stomach often with mild vomiting.
  • Fatigue: persistent tiredness affecting daily activities.

Serious or Rare Side Effects

  • Deep vein thrombosis: blood clot formation in deep veins, potentially leading to swelling and pain.
  • Endometrial cancer: abnormal growth of uterine lining, requiring monitoring.
  • Severe allergic reaction: rash, itching, swelling, or difficulty breathing.

Precautions & Warnings

Before initiating therapy, clinicians should consider several safety measures.

  • Monitor liver function: perform baseline and periodic liver enzyme tests.
  • Assess thromboembolic risk: avoid use in patients with a history of clotting disorders.
  • Evaluate uterine health: consider periodic gynecologic assessment for endometrial changes.
  • Counsel on pregnancy: drug is contraindicated during pregnancy; effective contraception is required.
  • Store at ambient temperature: keep in the original container, protect from moisture and light.

Avoid Interactions

Tamoxifen citrate can interact with other medicines, altering its effectiveness or safety profile.

Major Interactions (Avoid)

  • Warfarin: increased anticoagulant effect and bleeding risk.
  • Strong CYP3A4 inhibitors (e.g., ketoconazole): raise tamoxifen plasma concentrations.
  • Estrogen‑containing contraceptives: may reduce tamoxifen efficacy.

Moderate Interactions (Monitor Closely)

  • SSRIs (e.g., fluoxetine): may affect tamoxifen metabolism.
  • Other anticoagulants: require INR monitoring.
  • CYP2D6 substrates: tamoxifen metabolism may be altered, adjust therapy as needed.

Frequently Asked Questions

Nolvadex, whose active ingredient is tamoxifen citrate, is prescribed for estrogen receptor‑positive breast cancer in both early (adjuvant) and metastatic settings, for reducing the risk of breast cancer in women identified as high‑risk, and for managing gynecomastia in men caused by hormonal imbalance.

Tamoxifen citrate acts as a selective estrogen receptor modulator. It binds to estrogen receptors in breast tissue, blocking estrogen‑driven cell growth, while partially stimulating receptors in bone and the uterus. This selective antagonism and agonism disrupts estrogen signaling pathways that fuel certain tumors.

The dosing regimen for tamoxifen citrate is individualized. A qualified prescriber determines the appropriate dose, frequency, and duration based on the specific indication, patient characteristics, and clinical guidelines. Patients should follow the prescribing information provided by their healthcare professional.

Tamoxifen citrate is contraindicated in pregnancy because it may cause fetal harm. Women of child‑bearing potential should use effective contraception during treatment and for a period after discontinuation. Limited data exist for breastfeeding, and the drug is generally not recommended while nursing.

To order Nolvadex, 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.

Nolvadex (tamoxifen) is a well‑established selective estrogen receptor modulator, whereas alternatives such as aromatase inhibitors lower estrogen production rather than block its receptor. Tamoxifen is often chosen for pre‑menopausal patients and for risk‑reduction strategies, while aromatase inhibitors are preferred in post‑menopausal settings.

Nolvadex should be stored at ambient temperature, below 25 °C. Keep the tablets in the original packaging, protect them from moisture, excessive heat and direct light to maintain potency throughout the shelf life.

Nolvadex is administered orally as a tablet. Patients swallow the tablet whole with water, typically once daily, unless the prescribing clinician advises a different schedule. Consistency with food intake is not required, but patients should follow the specific instructions given by their healthcare provider.

Serious risks include thromboembolic events such as deep‑vein thrombosis or pulmonary embolism, endometrial cancer due to partial agonist activity in uterine tissue, and severe allergic reactions. Patients should be monitored regularly for signs of clotting, abnormal uterine bleeding, or hypersensitivity.

Nolvadex is contraindicated in individuals with known hypersensitivity to tamoxifen or any of its excipients, in pregnant women, and in patients with a history of thromboembolic disorders unless the benefits outweigh the risks. Clinicians should also exercise caution in patients with active liver disease or uncontrolled uterine pathology.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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