Lorazepam - anyone been prescribed this for sickness

I had my assessment yesterday for Chemo No 4 planned for tomorrow. I suffered quite badly with sickness on No 3 and told the oncologist this at the assessment. She has prescribed Lorazepam - two tablets - one to be taken an hour before chemo and one the next day. Just wondered if anyone else had had this for sickness?

Have read that it can cause drowsiness and just wondered if anyone had any experience of this. When I did a search on this it seemed to be mostly prescribed for anxiety.

Many thanks in advance for any help.