SN instructed patient on medication Ceftriaxone. Is an antibiotic used to treat a wide variety of bacterial infections. This medication is known as a cephalosporin antibiotic. It works by stopping the growth of bacteria. A serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction include: nausea, vomiting, diarrhea. Patient verbalized understanding the teaching. Those teaching will be reinforced.