My Husband Recently Had 4 Stints In His Heart. He

My husband recently had 4 stints in his heart. He has never had a weight problem. But during his time in the hospital he won't 20lbs. He did have fluid retention which is now corrected. Since he came home he is an eating machine. He has continued to gain ata moderate rate but he is eating everything in sight. I am checking his medications to see if there is something that is causing the major increase in eating.