Hi Klemarie, I had 4 x AC three weekly & am now halfway through 12 x Taxol. The "A" part of AC is Adriamycin aka " The Red Devil" so that must be what your mum is having & your urine is red for about 24 hours. It is quite a common regime combined with other drugs. it is the strongest chemo but luckily I didn't suffer too much. It is good that your mum is having a break & will then be able to have the rest of her chemo. Good idea if you can speak to her oncologist directly so you can understand the situation. Good luck!