My partner finished a 14-day Flagyl treatment for C-diff one week ago. He is still having dizziness when rising from sitting or lying down, is still having loose stools, and is generally weak. He did not have the dizziness or weakness before starting Flagyl. He also resumed drinking wine 3 days after finishing the treatment and it seems to affect him much faster than before taking Flagyl. We went on a walk last night and he was a bit off balance at first, but by the time we finished, he was hardly able to walk. He is seeing his GI doctor the first of the week to see if he still has the C-diff. He also recently dieted on Nutrisystems and lost 18 lbs. That was before being diagnosed with C-diff. He does not look well to me. His color is ashen and his eyes seem a bit sunken. Could these symptoms be C-diff or Flagyl related, or something else?