Answer
They must not be mixed or administered simultaneously because calcium–ceftriaxone precipitates can form. Newborn babies have additional contraindications.
Sources for this answer
- Calcium Chloride 10 millimoles in 10 ml Injection — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.