The generic name of Classico is infliximab for injection, which has some side effects in the treatment of Crohn’s disease and may cause adverse reactions such as upper respiratory tract infection (e.g., influenza, etc.), dizziness and headache, nausea and vomiting, and abnormal liver function. Infliximab for Injection is a monoclonal antibody that inhibits the binding of TNFα to its receptor, and is commonly used in clinical practice for the treatment of rheumatoid arthritis, Crohn’s disease, ankylosing spondylitis, psoriasis, ulcerative colitis, and other diseases. Multi-system adverse reactions may occur during treatment. 1. Respiratory system: such as upper respiratory tract infections (influenza, etc.), sinusitis, bronchitis, pneumonia, dyspnea, etc. 2. Gastrointestinal system: abdominal pain and distension, nausea, gastrointestinal bleeding, diarrhea, dyspepsia, gastroesophageal reflux, constipation, etc. 3. Hepatobiliary system: abnormal liver function, hepatitis, cholecystitis, etc. 4. Blood and lymphatic system: such as neutropenia, anemia, lymphadenopathy, thrombocytopenia, etc. 5. Infectious diseases: herpes virus infection, sepsis, cellulitis, tuberculosis, etc. Infliximab for Injection should be used with caution and is contraindicated in patients with tuberculosis or other active infections (including sepsis, abscesses, opportunistic infections, etc.), patients with moderate-to-severe heart failure, and pregnant and lactating women. Patients with Crohn’s disease are advised to seek timely medical attention and actively receive treatment from specialized physicians. When Infliximab for Injection is used, it should be consulted with a doctor in advance and taken in strict accordance with the doctor’s instructions, and should not be used on its own, so as not to delay the condition.