Mucsle aches and stiffness

I have CDI and take DDAVP pills two-three a day. The chiropractor asked if the meds could be causing the severe muscle aches and stiffness ?? I looked it up and really didn’t see anything related to that, accept maybe water over load and I know that is not the problem!
Does nayone else have this or know anything about it? I promised him I would look more into this! Thanks Kim