Medicine guide

Koselugo

  • Prescription status not stated
  • Cancer treatments and immune-system medicines
Active substance
Selumetinib
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

  • Koselugo as monotherapy is indicated for the treatment of symptomatic, inoperable plexiform neurofibromas (PN) in adult and paediatric patients with neurofibromatosis type 1 (NF1) aged 3 years and older. Koselugo as monotherapy is indicated for the treatment of symptomatic, inoperable plexiform neurofibromas (PN) in patients with neurofibromatosis type 1 (NF1) aged 1 year to less than 7 years and for older patients with swallowing difficulties.

From the official label · 2026-09-30 · European Medicines Agency

How it works

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

Selumetinib is an inhibitor of mitogen-activated protein kinase kinases 1 and 2 (MEK1/2).

MEK1/2 proteins are upstream regulators of the extracellular signal-related kinase (ERK) pathway.

How the body breaks it down

Selumetinib is primarily metabolized by CYP3A4 and to a lesser extent by CYP2C19, CYP1A2, CYP2C9, CYP2E1, and CYP3A5.

With food

Effect of Food No clinically significant differences in selumetinib pharmacokinetics were observed following administration of low fat (400-500 calories) or high-fat (800-1000 calories) meal.

Quoted from the prescribing label, sections “Mechanism of Action” and “Pharmacokinetics”. DailyMed · 2026-05-26

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

SpainNo exact match for this strength and form

CanadaNo exact match for this strength and form

NetherlandsNo exact match for this strength and form

SwitzerlandNo exact match for this strength and form

Details

Made byAstraZeneca AB
Active substanceSelumetinib
Used inCancer treatments and immune-system medicines
ClassificationL01EE04 · Cancer treatments and immune-system medicines
Orphan medicineYes — designated for a rare disease, according to the register
Additional monitoring ▼Yes — under additional monitoring (black triangle). Report suspected side effects.
Authorised on2021-06-17
Last updated by the regulator2026-07-01
EMA product numberEMEA/H/C/005244

Source: European Medicines Agency — medicine data · 2026-09-30 · not reviewed by a clinician

Source: European Medicines Agency (EMA). Product information as published by EMA. Reuse terms: EMA legal notice (reproduction authorised).