Recovery fron Hysterectomy?

It's highly unlikely that your mum is taking a reaction to the drugs after all this time. It is more likely that she has a hospital acquired infection D&V. Ask the staff what she is being tested for and why, if you don't ask they won't tell you. Ask if she should be in a single room and barrier nursed? Antibiotics do often give people diarrhoea but not with the sickness as well. hope this helps and your mum makes a complete recovery