What size syringe do i use for a 1G injection of rocephin?

For a 1 gram injection of Rocephin (ceftriaxone), a 3 mL syringe is typically suitable, as it allows for easy drawing and administration of the medication. If the medication is reconstituted in a volume of 2 to 3 mL, a 3 mL syringe will provide enough capacity without risking overflow. Always ensure to follow your healthcare provider's protocols and guidelines for the specific situation.