Hi, I have a grandfather who is 94 years old. He has prostate cancer,  but recently he begun having nausea whenever getting off bed. Sometimes he vomits after meal. Not having appetite. He complains that his head is not clear and that he feels sick in his head, but not headache. What could be the reason for this nausea... Thank you.
Hi, Detailed medical history is necessary. At this age medical comorbidities are expected.  Chat Doctor.  As such prostate cancer has got no relation with nausea, but the treatment history is necessary. Whether radiation is given or not. What the exact treatment are given for this disease should also be informed because some medications used in this disease has hepatotoxicity which may be associated with nausea also. Take care and consult your oncologist.