Stop Trial Medicine

My daddy has decided to stop the trial medicine just a few days before seeing the doctor again. He complains of pain within the body and still have persistence cough throughout the day and night.
The greatest battle of cancer is the pain the patient feel within their body. Pain killers are needed to help ease the patient pains. Sometimes we feel helpless on how we can help the patients.and doctor can only prescribe pain killers or drug to help them.