Ceftriaxone injection is a broad-spectrum antibiotic used to treat bacterial infections like pneumonia, meningitis, urinary tract infections, and sepsis. Administered intramuscularly or intravenously, ceftriaxone injection works by inhibiting bacterial cell wall synthesis, effectively killing the bacteria. It is typically prescribed for severe infections when oral antibiotics are insufficient. The dosage of ceftriaxone injection depends on the infection’s severity and patient's age, usually given once or twice daily. Common side effects include pain at the injection site, diarrhea, and rash. Serious allergic reactions are rare but possible. Always consult a healthcare provider before using ceftriaxone injection to ensure proper administration and avoid drug interactions.