Hi, welcome to HCM I am Dr Das
In today's world many people are suffering from carcinoma . They all are being treated or atleast being tried to treat.
Now, for vomiting
i think no doctor will advice radiation
. It is for the disease your father has, as a son you must have to fight against the disease and not just watching what will happen for some goddam side effects? Shame.
For vomiting just give granisetron
like drugs which will definitely give relief .