1st March 2024

A 14-day-old infant is brought to A&E with drowsiness, irritability and photophobia.

A 14-day-old infant is brought to A&E with drowsiness, irritability and photophobia. On examination, a petechial rash is seen over the child’s trunk, and he is febrile and unwell. A diagnosis of neonatal sepsis due to bacterial meningitis is suspected. The child weighs 4.2kg. The trust guidance is for IV ceftriaxone as first line empirical treatment. The hospital only supplies ceftriaxone 2g/5ml powder for intravenous infusion.

What volume of ceftriaxone should be given, to the nearest 2 decimal points?