Ceftriaxone injection should not be given to individuals with a known allergy to cephalosporin antibiotics, including those allergic to cephalexin capsules. It is also contraindicated in neonates with hyperbilirubinemia due to the risk of bilirubin encephalopathy. Patients with severe liver or kidney dysfunction or those receiving calcium-containing IV solutions should use caution. Always consult a healthcare provider before use. For those allergic to cephalexin capsules, seeking an alternative from a trusted cephalexin capsules supplier is essential to ensure safety and efficacy in treatment. Proper screening is critical to prevent serious adverse reactions associated with ceftriaxone.