What is the typical loading dose for caffeine citrate in apnea of prematurity?

• A. 2 mg/kg
• B. 1 mg/kg
• C. 20 mg/kg
• D. 100 mg/kg

Answer: (C)

The main idea is to rapidly achieve therapeutic caffeine levels to reduce apnea events in premature infants. Giving a loading dose around twenty milligrams per kilogram quickly brings the caffeine concentration into the range that produces a clinical effect, typically within 24 hours. This quick ramp is important because starting from a lower dose would take too long to reach effective levels, and a much larger dose could raise the risk of toxicity. After the loading dose, a smaller, ongoing maintenance dose (commonly around 5–10 mg/kg per day) helps keep the levels within the therapeutic window. Higher doses, such as those around 100 mg/kg, increase the risk of adverse effects like tachycardia and feeding intolerance, while far smaller doses may not adequately control apnea. Caffeine acts as a central nervous system stimulant by antagonizing adenosine receptors, which enhances respiratory drive and stabilizes breathing in these infants.