My Husband Started Taking Eliquis About Two Weeks Ago. Now

My husband started taking eliquis about two weeks ago. Now he has joint pain, blood in the urine and
swollen feet. This pass summer he got an ulser from taken Warfin. He has a pacemaker for his afib.
The heart doctor said he need a blood thinner because he has afib and a clot could cost him his life without
the blood thinner. Both these blood thinner he was on them for a few weeks and cause all kinds of problems. He was off blood thinners for about four months, because warfin cause the ulser and he develope no blood clots. Yes he was lucky,but is there a chance he can not take blood thinner at all. What will
happen to him then.