My husband is on xarelto - a blood thinner- for seven day AF episode- He took a medication, Flecainide, in the hospital to help restore the natural heart rhythm. while it worked, he flat lined for 7 seconds, which to me is a long time and a concern. Four days latter he developed a bladder/kidney? infection (today) with 102.6 fever. I am wondered about the interaction of all his drugs - hydrochlorothiazide, atenolol, verapamil, and xarelto and the effects on the kidney. Please Advise