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In the US, Calfactant (calfactant systemic) is a member of the drug class lung surfactants and is used to treat Respiratory Distress Syndrome.

US matches:



CAS registry number (Chemical Abstracts Service)


Therapeutic Categories

Pulmonary surfactant

Treatment of neonatal respiratory distress syndrome

Chemical Name

An unmodified calf lung lavage extract containing mostly phospholipids and surfactant specific proteins (SP-B and SP-C) (USAN)

Foreign Name

  • Surfactant (Kalb) (German)

Generic Names

  • Calfactant (OS: BAN, USAN)
  • CLL (IS)
  • CLSE (IS)
  • Surfactant (IS: Kalb)
  • UNII-Q4K217VGA9 (IS)

Brand Names

  • Infasurf
    Kwang Dong, South Korea; Ony, Singapore
  • Infasurf (pediatric)
    ONY, Israel; ONY, United States


BANBritish Approved Name
ISInofficial Synonym
OSOfficial Synonym
USANUnited States Adopted Name

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

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.