Medicine guide

FASLODEX

As listed in the register: FASLODEX 250 mg, solution injectable

250 mg · solution injectable

  • Prescription only
Active substance
Fulvestrant
Made by
ASTRAZENECA AB

Quoted from the official source. Not yet reviewed by Mediclarum — the leaflet in your pack is authoritative.

What it is for

Mediclarum has not yet retrieved and stored the official label for this product, so none of its text is shown here. Open the official leaflet

How it works

From the US prescribing label for the same active substance (CLIGAVYX). It describes the substance, not this exact product.

Many breast cancers have estrogen receptors (ER) and the growth of these tumors can be stimulated by estrogen.

Fulvestrant is an estrogen receptor antagonist that binds to the estrogen receptor in a competitive manner with affinity comparable to that of estradiol and downregulates the ER protein in human breast cancer cells.

Half-life40 days
Mostly cleared after≈ 29 weeksfive half-lives — our arithmetic
How the body breaks it down

Although fulvestrant is partly metabolized by CYP 3A4, a clinical study with rifampin, an inducer of CYP 3A4, showed no effect on the pharmacokinetics of fulvestrant.

Quoted from the prescribing label, sections “Mechanism of Action” and “Pharmacokinetics”. DailyMed · 2026-06-24

Safety of the active substance

From the US prescribing label for the same active substance (CLIGAVYX). It describes the substance, not this exact product.

Must not be used by
  • CLIGAVYX is contraindicated in patients with a known hypersensitivity to the drug or to any of its components.
  • Hypersensitivity reactions, including urticaria and angioedema, have been reported in association with CLIGAVYX [see Adverse Reactions (6.2) ].
Most common side effects

The most frequently reported adverse reactions in the fulvestrant 500 mg group were injection site pain (11.6% of patients), nausea (9.7% of patients), and bone pain (9.4% of patients); the most frequently reported adverse reactions in the fulvestrant 250 mg group were nausea (13.6% of patients), back pain (10.7% of patients), and injection site pain (9.1% of patients).

Quoted from the US prescribing label for the same active substance. Your own pack’s leaflet is the authority for your product. DailyMed

Same active substance, strength and form in other countries

Matched on active substance, strength and kind of form only. This is not a statement that the products are equivalent or interchangeable: other ingredients, release and approved uses can differ — ask a pharmacist before swapping.

Medicine passport: one printable page to show a pharmacist abroad

United StatesNo exact match for this strength and form

European UnionNo exact match for this strength and form

CanadaNo exact match for this strength and form

Details

Made byASTRAZENECA AB
Active substanceFulvestrant
Strength250 mg
Formsolution injectable
Routeintramusculaire
Dispensing (as stated by the register)liste I
MarketedYes, according to the register
Authorisation procedureProcédure centralisée
EU numberEU/1/03/269
Name in the registerFASLODEX 250 mg, solution injectable
Packs1 seringue(s) préremplie(s) en verre avec aiguille(s) de 5 ml
CIS63545028
CIP133400936349001

Source: Base de données publique des médicaments · 2026-09-30 · not reviewed by a clinician

Source : Base de données publique des médicaments (ANSM / Ministère de la Santé), sous Licence Ouverte. Reuse terms: Licence Ouverte / Open Licence (Etalab).

Same active substance

These contain the same substance. That does not mean one can replace another — ask a pharmacist.