Transient short duration pain may occur following intra-articular introduction. The affected joint may show a mild local reaction like pain, feeling of heat, hyperthermia, redness, effusion, irritation, and swelling/inflammation. If these symptoms occur, rest the affected joint and apply ice locally. Symptoms subside within days for most of the patients. In some cases, mild local reactions such as pain, irritation, swelling/joint inflammation and effusion may be significantly enhanced and much more severe as an expression of hypersensitivity. In such cases, a therapeutic intervention could be necessary, e.g. aspiration of joint fluid. Local adverse reactions could be accompanied by systemic reactions such as fever, chills, or cardiovascular reactions, and in rare cases anaphylactic reactions. In extremely rare circumstances, rash/itching, urticaria, synovitis, and a drop in blood pressure have been reported following the administration of SUPLASYN. Discontinue use if adverse reactions are experienced.