Methylcobalamin and amoxicillin are not the same medicine. 1. Methylcobalamin: Dosage forms include tablets, capsules, and injections. (1) Indications: for the treatment of peripheral neuropathy and megaloblastic anemia caused by vitamin b₁₂ deficiency. (2) Side effects: decreased blood pressure, dyspnea, rash, headache, fever, sweating, pain at the site of intramuscular injection. (3) Contraindications: prohibited for those who are allergic to the product and its components. 2. Amoxicillin: dosage forms include tablets, capsules, granules, dry suspension. (1) Indications: otitis media, sinusitis, pharyngitis, tonsillitis and other upper respiratory tract infections caused by Streptococcus hemolyticus, Streptococcus pneumoniae, Staphylococcus staphylococcus or Haemophilus influenzae. Genitourinary tract infections caused by Escherichia coli, Proteus mirabilis or Enterococcus faecalis. Soft tissue skin infections due to Streptococcus hemolyticus, Staphylococcus or Escherichia coli. Lower respiratory tract infections such as acute bronchitis and pneumonia caused by Streptococcus hemolyticus, Streptococcus pneumoniae, Staphylococcus staphylococcus or Haemophilus influenzae. Eradication of Helicobacter pylori in combination with other drugs. (2) Adverse reactions: diarrhea, nausea, skin rash. (3) Contraindications: Penicillin allergy, positive penicillin skin test, and severe rapid hypersensitivity (e.g., allergic reaction) to other β-lactam agents (e.g., cephalosporins, carbapenems, and monocyclic-lactams) are contraindicated. Patients should consult a doctor before using the drug to avoid accidents, and if any uncomfortable symptoms occur during the use of the drug, please consult a doctor for examination and treatment in time.