Is a mother who died of breast cancer that affected her liver and kidneys considered a martyr, taking into account that she was taking strong painkillers that sometimes caused her to sleep and lose consciousness, leading her to miss some prayers, and does she need to make up the missed prayers?

We hope your mother is among the martyrs of the Afterlife due to her severe illness, as the Prophet, peace and blessings be upon him, said: "And the one who dies of an internal ailment is a martyr." Strive in supplicating for her forgiveness and mercy. Every act of devotion whose reward you dedicate to her will benefit her, Allah willing. As for praying on her behalf for missed prayers, that is not legislated.