My father had an angiogram, and 2 angioplasty procedures with a total of 3 stent placements in the past 4 weeks. He had an allergic reaction to something following the last angioplasty----swelling of jaw, face, and generalized swelling and itching all over. That has resolved but starting suddenly 2 weeks after the last procedure, he has severe, generalized joint stiffness and pain. His right knee is swollen and very painful. The only thing new since his angioplasties is that he was placed on Plavix.
Could this be from Plavix? Would this have anything to do with the allergic reaction?