Suggest Treatment For Arthirtis

hi....my husband has arthirtis in his knees real bad and he s not strong enough for a knee replacement although the ortho doctor said they could give him a epidural but am not sure if hubby could walk enough. he is also diabetic and takes insulin....lantus and novolg. he has had trouble voiding and when i took him to the doctor his white blood count with was high but the PA didn t know where and gave him ciproflaxin because he was pretty sure it was in his lungs. but anyway i thought maybe he had bladder or kidney infection was the trouble he was having going to the bathroom. urine sample showed no kidney or bladder infection so the PA gave him samples of toviaz to help him void. he took it for a week and was way worse than it was before. the PA has him on (2) 50 mgs pf tramadol every 8 hours...i took him to the er a couple of weeks ago and they told him his white blood count was up a little but still no one knows where the infection is and the er doctor put him on a predisonne regimen. i forgot to mention he also had shingles on his left buttock and on his gentials. that started last october.....what a year it has been...he is afraid if i take him to a bigger hospital they won t find anything wrong. he also lost 50 to 60 pounds in a year....i am very worried about him