Poractant alfa


Poractant alfa
Accession Number
Biologic Classification
Protein Based Therapies
Other protein based therapies

Poractant alfa is a pulmonary surfactant marketed as Curosurf in the United States and Canada. It is used to treat Respiratory Distress Syndrome (RDS) in premature infants with an endogenous pulmonary surfactant deficiency. Poractant alfa is an extract of natural porcine lung surfactant consisting of 99% polar lipids (mainly phospholipids) and 1% hydrophobic low molecular weight proteins (surfactant associated proteins SP-B and SP-C). The phospholipid content of the extract consists primarily of phosphatidylcholine and dipaImitoylphosphatidylcholine. Poractant alfa is a creamy white suspension of this extract in 0.9% sodium chloride solution. It contains no preservatives.

Protein chemical formula
Not Available
Protein average weight
Not Available
Not Available
Not Available
Prescription Products
NameDosageStrengthRouteLabellerMarketing StartMarketing End
CurosurfSuspension80 mgEndotrachealChiesi Farmaceutici S.P.A.2016-12-19Not applicableCanada
CurosurfSuspension80 mg/1mLEndotrachealChiesi USA, Inc.1999-11-18Not applicableUs
CurosurfSuspension80 mg/1mLEndotrachealDey2006-04-072006-04-07Us
Additional Data Available
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  • Product Code
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CAS number



Poractant alfa is indicated for the treatment of Respiratory Distress Syndrome (RDS) in premature infants.

Associated Conditions

Poractant alfa improved lung compliance, pulmonary gas exchange and survival in preterm rabbits.

Mechanism of action

Endogenous pulmonary surfactant reduces surface tension at the air-liquid interface of the alveoli in the lungs, thus stabilizing them against collapse under transpulmonary pressures. A deficiency of pulmonary surfactant in premature infants allows surface tension to increase to the point where sections of lung collapse and respiratory distress syndrome (RDS) develops. Poractant alfa lowers minimum surface tension to less than or equal to 4 mN/m. This compensates for the lack of endogenous surfactant and restores adequate surface activity to the lungs.

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Poractant alfa is administered directly to the site of action in the lungs via endotracheal tube. It very rapidly adsorbs to the air-liquid interface to form a stable surfactant monolayer. No studies on absorption of poractant alfa have been performed in humans.

Volume of distribution

No studies on the distribution of poractant alfa have been performed in humans.

Protein binding
Not Available

No studies on the metabolism of poractant alfa have been performed in humans. One small study in rabbits did find that poractant alfa may be degraded by macrophages and that it may, in part, be recycled in the alveoli in a similar manner to endogenous lung surfactant.

Route of elimination

No studies on elimination of poractant alfa have been performed in humans.

Half life

The half-life of poractant alfa has only been evaluated in animal studies. When studied in adult and newborn rabbits, the half-life in the lungs was found to be 25 and 67 respectively.


No studies on clearance of poractant alfa have been performed in humans.


Studies on the carcinogenicity or reproductive effects of poractant alfa have not been conducted. Mutagenicity assays were negative. In the case of an overdose with poractant alfa where there are clear clinical effects on the infant's respiration, ventilation, or oxygenation, it is recommended that as much of the solution be aspirated as possible and the infant be managed with supportive measures. Fluid and electrolyte balances should be monitored closely in this case.

Affected organisms
  • Humans and other mammals
Not Available
Pharmacogenomic Effects/ADRs
Not Available


Drug Interactions
This information should not be interpreted without the help of a healthcare provider. If you believe you are experiencing an interaction, contact a healthcare provider immediately. The absence of an interaction does not necessarily mean no interactions exist.
AcebutololAcebutolol may increase the bradycardic activities of Poractant alfa.
AgmatineAgmatine may increase the bradycardic activities of Poractant alfa.
AlfentanilAlfentanil may increase the bradycardic activities of Poractant alfa.
AlprenololAlprenolol may increase the bradycardic activities of Poractant alfa.
AmiodaroneAmiodarone may increase the bradycardic activities of Poractant alfa.
AmlodipineAmlodipine may increase the bradycardic activities of Poractant alfa.
AnisodaminePoractant alfa may increase the bradycardic activities of Anisodamine.
AranidipinePoractant alfa may increase the bradycardic activities of Aranidipine.
ArotinololPoractant alfa may increase the bradycardic activities of Arotinolol.
AtenololAtenolol may increase the bradycardic activities of Poractant alfa.
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Food Interactions
Not Available


Synthesis Reference

Curosurf: Product Monograph. Parma, Italy: Chiesi Farmaceutici S.p.A.; 2008: 25-27.

General References
  1. Fujii AM, Carillo M: Animal-derived surfactant treatment of respiratory distress syndrome in premature neonates: a review. Drugs Today (Barc). 2009 Sep;45(9):697-709. doi: 1396674/dot.2009.45.9.1418185. [PubMed:19956811]
  2. Jeon GW, Oh M, Sin JB: Efficacy of surfactant-TA, calfactant and poractant alfa for preterm infants with respiratory distress syndrome: a retrospective study. Yonsei Med J. 2015 Mar;56(2):433-9. doi: 10.3349/ymj.2015.56.2.433. [PubMed:25683992]
  3. Alberti A, Pettenazzo A, Enzi GB, Palamidese A, Mapp C, Ventura P, Baritussio A: Uptake and degradation of Curosurf after tracheal administration to newborn and adult rabbits. Eur Respir J. 1998 Aug;12(2):294-300. [PubMed:9727777]
  4. Bourbon JR, Chailley-Heu B, Gautier B: The exogenous surfactant Curosurf enhances phosphatidylcholine content in isolated type II cells. Eur Respir J. 1997 Apr;10(4):914-9. [PubMed:9150335]
  5. Calkovska A, Uhliarova B, Joskova M, Franova S, Kolomaznik M, Calkovsky V, Smolarova S: Pulmonary surfactant in the airway physiology: a direct relaxing effect on the smooth muscle. Respir Physiol Neurobiol. 2015 Apr;209:95-105. doi: 10.1016/j.resp.2015.01.004. Epub 2015 Jan 10. [PubMed:25583659]
  6. Cogo PE, Facco M, Simonato M, Verlato G, Rondina C, Baritussio A, Toffolo GM, Carnielli VP: Dosing of porcine surfactant: effect on kinetics and gas exchange in respiratory distress syndrome. Pediatrics. 2009 Nov;124(5):e950-7. doi: 10.1542/peds.2009-0126. Epub 2009 Oct 12. [PubMed:19822594]
  7. Singh N, Halliday HL, Stevens TP, Suresh G, Soll R, Rojas-Reyes MX: Comparison of animal-derived surfactants for the prevention and treatment of respiratory distress syndrome in preterm infants. Cochrane Database Syst Rev. 2015 Dec 21;12:CD010249. doi: 10.1002/14651858.CD010249.pub2. [PubMed:26690260]
  8. Wiseman LR, Bryson HM: Porcine-derived lung surfactant. A review of the therapeutic efficacy and clinical tolerability of a natural surfactant preparation (Curosurf) in neonatal respiratory distress syndrome. Drugs. 1994 Sep;48(3):386-403. [PubMed:7527760]
  9. Sweet D, Bevilacqua G, Carnielli V, Greisen G, Plavka R, Saugstad OD, Simeoni U, Speer CP, Valls-I-Soler A, Halliday H: European consensus guidelines on the management of neonatal respiratory distress syndrome. J Perinat Med. 2007;35(3):175-86. [PubMed:17480144]
  10. Schurch S, Schurch D, Curstedt T, Robertson B: Surface activity of lipid extract surfactant in relation to film area compression and collapse. J Appl Physiol (1985). 1994 Aug;77(2):974-86. [PubMed:8002555]
  11. Malloy CA, Nicoski P, Muraskas JK: A randomized trial comparing beractant and poractant treatment in neonatal respiratory distress syndrome. Acta Paediatr. 2005 Jun;94(6):779-84. [PubMed:16188788]
  12. Ramanathan R, Rasmussen MR, Gerstmann DR, Finer N, Sekar K: A randomized, multicenter masked comparison trial of poractant alfa (Curosurf) versus beractant (Survanta) in the treatment of respiratory distress syndrome in preterm infants. Am J Perinatol. 2004 Apr;21(3):109-19. [PubMed:15085492]
  13. Speer CP, Robertson B, Curstedt T, Halliday HL, Compagnone D, Gefeller O, Harms K, Herting E, McClure G, Reid M, et al.: Randomized European multicenter trial of surfactant replacement therapy for severe neonatal respiratory distress syndrome: single versus multiple doses of Curosurf. Pediatrics. 1992 Jan;89(1):13-20. [PubMed:1727997]
External Links
PubChem Substance
RxList Drug Page
Drugs.com Drug Page
AHFS Codes
  • 48:36.00 — Pulmonary Surfactants
FDA label
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Clinical Trials

Clinical Trials
1RecruitingTreatmentCongenital Heart Disease (CHD) / Hypoplastic Left Heart Syndrome (HLHS)1
2CompletedTreatmentRespiratory Distress Syndrome, Newborn1
2Not Yet RecruitingTreatmentARDS, Human / Novel Coronavirus Infectious Disease (COVID-19)1
2RecruitingTreatmentNeonatal Respiratory Distress Syndrome1
2, 3CompletedTreatmentRespiratory Distress Syndrome1
3CompletedTreatmentRespiratory Distress Syndrome1
3RecruitingTreatmentViral Bronchiolitis1
3SuspendedTreatmentRespiratory Distress Syndrome, Newborn1
4Active Not RecruitingTreatmentChronic Lung Disease of Prematurity / Infant, Premature, Diseases / Respiratory Distress Syndrome, Newborn1
4CompletedPreventionRespiratory Distress Syndrome, Newborn1
4CompletedTreatmentMeconium Aspiration Syndrome1
4CompletedTreatmentRespiratory Distress Syndrome, Newborn / Respiratory Failure1
4Not Yet RecruitingTreatmentRespiratory Distress Syndrome1
4RecruitingPreventionChronic Lung Disease of Prematurity / Infants, Premature / Respiratory Distress Syndrome1
4TerminatedTreatmentInfants, Premature / Patent Ductus Arteriosus (PDA) / Respiratory Distress Syndrome1
Not AvailableActive Not RecruitingDevice FeasibilityRespiratory Distress Syndrome1
Not AvailableActive Not RecruitingTreatmentRespiratory Distress Syndrome / Surfactant Administration by Aerosolization1
Not AvailableCompletedTreatmentHyaline Membrane Disease / Respiratory Distress Syndrome1
Not AvailableCompletedTreatmentPoor Peripheral Perfusion1
Not AvailableCompletedTreatmentPulmonary Haemorrhage1
Not AvailableCompletedTreatmentRespiratory Distress Syndrome1
Not AvailableCompletedTreatmentRespiratory Distress Syndrome, Newborn1
Not AvailableRecruitingNot AvailableInfant, Newborn, NRDS1
Not AvailableWithdrawnTreatmentRespiratory Distress Syndrome1


Not Available
Not Available
Dosage forms
SuspensionEndotracheal80 mg
SuspensionEndotracheal80 mg/1mL
Not Available
Not Available


Experimental Properties
water solubilityInsoluble. #MSDS


Not Available
Organic Compounds
Super Class
Organic Acids
Carboxylic Acids and Derivatives
Sub Class
Amino Acids, Peptides, and Analogues
Direct Parent
Alternative Parents
Not Available
Not Available
Molecular Framework
Not Available
External Descriptors
Not Available

Drug created on September 22, 2015 10:04 / Updated on July 05, 2020 23:32

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