text_1: My 92 y.O friend suffers with knee & ankle arthritis. She is on xeralto 15mg, will using arnica gel for pain interfere with this blood thinner ? Thank
text_2: I am 92 years old and on xeralto 15mg and suferring from knee and ankle arthritis, I have tried arnica gel for pain but it's not helping. Should I go to the doctor? 