I Have A 46 Year Old Male Who's Had A

I have a 46 year old male who's had a triple bypass and three stents during the surgery they removed to Vein from inner left leg every since the pain has been unbearable I tried to work an 8-hour shift as a cook I am on Lyrica 100 mg once a day and it does not seem to help the pain it all what can I do what medications can I try to help ease the pain