Why is caffeine citrate used in apnea of prematurity and what is a typical dosing regimen?

• A. Caffeine citrate improves respiratory drive and reduces apnea; dosing: loading around 20 mg/kg caffeine citrate, then maintenance 5-10 mg/kg/day.
• B. Caffeine citrate is used to sedate the infant and calm breathing; dosing 5 mg/kg/day.
• C. Caffeine citrate reduces apnea but has no effect on respiratory drive; dosing 2 mg/kg loading.
• D. Caffeine citrate is contraindicated in apnea of prematurity.

Answer: (A)

The main idea here is that caffeine citrate helps treat apnea of prematurity by stimulating the infant’s breathing. Caffeine is a methylxanthine that blocks adenosine receptors in the brain, which increases central nervous system activity and boosts the respiratory drive. This leads to fewer apnea episodes, more stable breathing, and often a reduced need for ventilatory support. Its effects on diaphragmatic contractility and overall respiratory stability help preterm babies maintain better oxygenation with less work.

A typical and widely used dosing plan starts with a loading dose of about 20 mg/kg of caffeine citrate so that therapeutic levels are reached quickly. This is followed by a daily maintenance dose of around 5–10 mg/kg/day to keep those levels steady and continue reducing apnea events. Caffeine has a relatively long half-life in premature infants, which supports once-daily dosing after the loading dose and contributes to its favorable safety profile and ease of use compared with older therapies.