My 5'10" 93 year old father, was given Furosemide to reduce edema swelling in his legs. After two nights of repeated peeing, his weight dropped from 138 to 123. He now is has extreme back pain (new) and increased pain from arthritis in his knees, elbows and shoulders. He also has lost all strength, can't stand or lift himself up out of the wheelchair I have put him him. Would dehydration cause these symptoms, and what is the remedy. I can't get him to drink more that a glass or orange juice every two hours or so.