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In the US, Idelalisib (idelalisib systemic) is a member of the drug class PI3K inhibitors and is used to treat Chronic Lymphocytic Leukemia, Follicular Lymphoma, Lymphoma and Non-Hodgkin's Lymphoma.

US matches:



ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Category

Antineoplastic agent

Chemical Name

5-fluoro-3-phenyl-2-{(1S)-1-[(7H-purin-6-yl)amino]propyl}quinazolin-4(3H)-one (WHO)

Foreign Names

  • Idelalisibum (Latin)
  • Idelalisib (German)
  • Idélalisib (French)
  • Idelalisib (Spanish)

Generic Names

  • Idelalisib (OS: USAN, JAN)
  • CAL-101 (IS)
  • GS-1101 (IS)
  • UNII-YG57I8T5M0 (IS)

Brand Names

  • Zydelig
    Gilead, Czech Republic; Gilead, Estonia; Gilead, Spain; Gilead, Finland; Gilead, France; Gilead, Ireland; Gilead, Lithuania; Gilead, Netherlands; Gilead, Norway; Gilead, Poland; Gilead, Sweden; Gilead, Slovakia; Gilead, United States; Gilead Sciences, Australia; Gilead Sciences, Canada; Gilead Sciences, Denmark; Gilead Sciences, United Kingdom; Gilead Sciences, Romania; Gilead Sciences Belgium, Belgium; Gilead Sciences International, Iceland; Gilead Sciences International Ltd, Greece; Gilead Sciences Ireland, Slovenia
  • Zydelig 100mg
    Gilead, Switzerland; Gilead, Germany; Gilead, Luxembourg; Gilead Sciences International, Austria
  • Zydelig 150mg
    Gilead, Switzerland; Gilead, Germany; Gilead, Luxembourg; Gilead Sciences International, Austria


ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name
WHOWorld Health Organization

Further information on drug naming conventions: International Nonproprietary Names.

Important Notice: The international database is in BETA release. This means it is still under development and may contain inaccuracies. It is not intended as a substitute for the expertise and judgement of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that the use of any medication in any country is safe, appropriate or effective for you. Consult with your healthcare professional before taking any medication.

Further information

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