What is possible interactions of mixing of dexamethasone and ceftriaxone ampoules in one syringe?

Here's one if you're planning on sticking it in someone, its going to hurt like h@#$. You want to give the smallest amount possible when you give the cephalosporins IM. because they really hurt. And give it deep im in a nice big muscle. The other thing is you don't know if the two drugs are compatible to be mixed together, will one of them cause the other to precipitate out. Its best not to mix drugs, but give each as a separate shot.