I Am A Minister Doing Marriage Counseling. |A Recent Client

I am a minister doing marriage counseling. |A recent client is planning on getting married and was told that her partner was diagnosed years ago with a pituitary tumor, the gland was removed, and he is on meds. His site is compromised in one eye, he gets weak sometimes and recently his meds were increased. She wants to know if he is able to become intimate? Would he have difficulty maintain an erection???Thanks in advance, she is a young women neither want children but she does want a sexual side to the union.