Coping With Coma

My grandmother is 90-years old, but she was perfectly healthy until she fell and broke her leg. They gave her a total anestesya [anesthesia] in the hospital before the operation. She woke up after the operation and she was normal, maybe a little bit disoriented. She came home, the doctors prescribed her very strong pain killers and some barbiturates and sleeping pills. She started drinking those pills and she was becoming lost, her thinking became confused, and she started to lose her mind. She was yelling all the time and she couldn’t sleep at all, but the doctor said to continue giving her those pills. It lasted for about month or two, and 5 days ago she fell asleep and she’s not waking up. She doesn’t look like she’s in a coma to me, because she snores and sometimes she moves, but the doctor came yesterday and said that she is in a coma and that there’s nothing they can do. I live in Serbia and here doctors don’t care for old people. We were calling them for 3 days and they came yesterday and they didn’t take her to the hospital. They just said, “Well, she’s 90-years old, what do you expect?” I know that she’s old but I don’t understand what caused the coma. She was perfectly normal before the operation. Is it possible that anestesya or those barbiturates that she was drinking afterwards caused it? If someone can answer me I would be really grateful. I hope that she’s not in pain. She looks like she’s just asleep and that she could wake up any time.