Normally ovarian cancer
at stage 1 or 2 even 3 is curable, but according to you she is at end stage of the diseease and has been prescribed narcotic
analgesics like morphine
for pain. i can tell you that morphine patches are avalable in strengths of 25, 50 and 75 microgram release per hour. the usage of strength depends upon the intensity of pain. it is a slow release drug to be utilized every 72 hrs. by dermal application. It is very safe and convenient to use. You can convince your sister about its efficacy and ease of adminstration. She will gladly accept.
Regarding how much time she lives on morphine depends upon the parameters like creatinine
and BUN level. Normally such. patients slip into uraemic coma
and die. In this mode the death is very peaceful. Mind it this patch form of morphine is not a killer, it soothes pain. You need the prescription of the authorized doctor to obtain these dermal patches.