Final answer:
Pulmonary surfactant therapy is used to increase surfactant levels and promote lung maturity in preterm labor cases.
Step-by-step explanation:
The medication used to increase surfactant levels and help with lung maturity in cases of preterm labor is pulmonary surfactant therapy. Pulmonary surfactant is a substance that reduces surface tension in the alveoli of the lungs, allowing for easier inflation and promoting lung function. Administration of synthetic surfactants through endotracheal intubation or nasal tubes can help improve respiratory distress in preterm infants.