In case of sinusitis due to infection by a causative organism that is sensitive to amoxicillin, the use of amoxicillin in the treatment can act as an anti-infective agent. Amoxicillin is a broad-spectrum penicillin and a beta-lactam antibiotic. It has a strong bactericidal effect, and the ability to penetrate the cell wall is also very strong, mainly used for infections caused by sensitive bacteria. So for sinusitis due to Streptococcus hemolyticus, Streptococcus pneumoniae, Staphylococcus or Haemophilus influenzae it is possible to take amoxicillin. Generally speaking, there is no special contraindication to amoxicillin, only to amoxicillin allergy, or penicillin allergic reaction to a class of people need to avoid taking. Some patients may experience a range of gastrointestinal symptoms, such as nausea, vomiting, diarrhea, abdominal pain and loss of appetite and other adverse reactions. If you have a need for medication, please use under the guidance of a doctor, do not blindly self-medication.