get help right away for unexpected bleeding, unusual bruising or tingling. if you have had spinal anesthesia while on xarelto watch for back pain or any nerve or muscle related signs or symptoms. do not take xarelto if you have an artificial heart valve or abnormal bleeding. tell your doctor before all planned medical or dental procedures. before starting xarelto tell your doctor about any conditions, such as kidney, liver or bleeding problems. to help protect yourself from a stroke, ask your doctor about xarelto. there's more to know. xarelto.