Ceftriaxone + Lactated Ringer's solution

MediHelp rates the interaction as major. Ceftriaxone and Lactated Ringer's solution can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Ceftriaxone can form insoluble calcium-ceftriaxone precipitates when mixed with calcium-containing solutions such as lactated Ringer's. Fatal cases of lung and kidney deposits have occurred in neonates. Labeling contraindicates concomitant use in neonates and prohibits mixing in the same line for all patients.

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not reconstitute or dilute ceftriaxone with lactated Ringer's or any calcium-containing solution, and do not give through the same line simultaneously. In patients older than 28 days, sequential administration is acceptable only if the line is thoroughly flushed with a compatible fluid between infusions.

MediHelp also lists interactions of Ceftriaxone with, for example, Calcium chloride, Calcium gluconate, Calcium. The full list is on the Ceftriaxone page.