Making up the prayer for one who suffered from dementia during an illness

Question:
Honorable Shaykh, may Allah grant you success. An elderly person was ill for twelve days and suffered from dementia, then he recovered, praise be to Allah. Does he have to make up the prayers for the twelve days he was ill? And how does he make up the prayer?

Answer:
Do you mean his consciousness was gone? Was he ill with his consciousness intact or not? If his consciousness was gone for twelve days and he had no thought, then he owes nothing. But if his consciousness was with him, it is obligatory for him to pray according to his condition. Leaving off the prayer is a mistake. He should pray according to his condition. Fear Allah as much as you are able. If he left off the prayer while his consciousness was with him, he must make it up.