You are working with a palliative care team providing support for a 78 year old man with stage 4 liver cancer. You attend each morning to give hi. breakfast and to help him shower. You have been thinking over the last few days that he seems to be getting weaker. His appetite seems to be decreasing but each time you ask him how he is he says he is fine. He is on moderate, regular doses of opioid pain killers. Today you notice that he seems to be in pain. He is reluctant to move and groans when he does move. You ask him if he is in pain and he says yes, and asks if his medication can be increased. What action should you take.