Semi-conscious, if I recall correctly, covers a wide range of responsiveness. She was unable to stand and slow to respond to questions but was well-oriented w.r.t. person, place and time. Drinking water wasn't a problem. The possible danger is that they'll vomit it up after passing out, or that they have some issue that requires emergency surgery. Now you've put something in their stomach that they might vomit during surgery, which is somewhat dangerous. But she had signs of dehydration so I did it.

In retrospect I should have given her honey or the like just in case she was having her first ever diabetic shock.