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You may feel a slight pinch or pressure during the injection
[DOI] [PubMed] [Google Scholar] 19.Li F., Chong Z

For instance, patients may experience symptoms related to liver disease (such as jaundice, abdominal swelling, or fatigue), haematological disorders (including unexplained bruising, night sweats, or weight loss), or kidney dysfunction (such as reduced urine output or swelling)

They are not approved for human or veterinary use