Comparative Pharmacology
Head-to-head clinical analysis: INFASURF PRESERVATIVE FREE versus SURVANTA.
Peer-Reviewed Evidence
Head-to-head clinical analysis: INFASURF PRESERVATIVE FREE versus SURVANTA.
INFASURF PRESERVATIVE FREE vs SURVANTA
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Infasurf (calfactant) is a natural bovine lung extract containing phospholipids (primarily dipalmitoylphosphatidylcholine, DPPC) and surfactant-associated proteins B and C. It reduces alveolar surface tension, preventing end-expiratory collapse and stabilizing alveoli, thereby improving lung compliance and gas exchange.
Survanta is a natural bovine lung extract containing phospholipids, neutral lipids, and surfactant-associated proteins. It reduces surface tension in the alveoli, preventing alveolar collapse at end-expiration and improving lung compliance.
Not applicable; Infasurf Preservative Free is an intratracheal suspension indicated only for neonatal respiratory distress syndrome (RDS).
100 mg phospholipids/kg (4 mL/kg) intratracheally, administered as 4 divided aliquots, repeated every 6 hours up to 4 doses as needed.
None Documented
None Documented
Terminal half-life in preterm infants: 10-17 hours; clearance correlates with lung maturation and surfactant recycling.
terminal elimination half-life of approximately 67 hours (range 37-85 hours) due to slow clearance from lungs; clinically, effects persist for days after single dose
Primarily cleared by alveolar macrophages and lung surfactant turnover; minimal renal or biliary excretion (<1%).
primarily pulmonary uptake and catabolism; minimal renal or biliary excretion; elimination via alveolar macrophages and recycling in surfactant
Category C
Category C
Pulmonary Surfactant
Pulmonary Surfactant