Hello Dr. My mother had done total knee replacement surgery for both legs 1 month back,(5, sep 2018) In global hospital parel in Mumbai She is still having extreme pain especially in one leg (right one) She is not able to sit on chair for more than 5 mins. Major problem is her Blood pressure is getting Low very frequently, sometimes she faint also. Dr. has stopped pain killer, antibiotics and nerve related medicine she is currently on blood thinner and anti anxiety medicine please help and guide me about the same.