My father is currently on stage 4 pacreatic cancer metastatis.....he has undergone 5 cycles of chemo x 3 chemos per cycle....his tumour shrunk significatly but just after the 5th chemo he went into delirium and completely lost his mimd with hallucination....his 6th cycle of chemo has been stopped foe now and is being treated for delirium.......please advice if there is any other alternate treatment to help cure his cancer without major side effe ts and will his mental condition be stable as currently he can hardly recognize us and having short term memory loss