Recovery after a bleeding ulcer surgery?

My husband got operated for a bleeding ulcer last monday in the emergency room, through his throat. So he was released on Thur. night. he is drinking some anti acid medication along with iron pills but he is still telling me that he feels very weak, oh and he also had a blood transfusion of 2 pts. so my question is. Is it normal for him to feel week and tired since he came out of the hospital on Thur. he saw his Dr. yesterday and told him to force him self to eat and to keep drinking his medication but did not say anything about him feeling weak. How long does it take to recover and is it normal for him to feel so weak. Thank you all in advance for your answers.