Ondansetron
"I suffer from anxiety and panic disorder. My stomach suffers from my anxiety and it seems that one triggers the other. After struggling for 3 days with constant nausea and running to the toilet I decided to be brave and try one 4mg wafer (I have a fear of any new medication). 
I made my husband drive into town, in case I had a reaction...so we were close to the hospital (I know...I'm crazy!!). Anyway, took the little wafer and within about 15 minutes started to feel better. Last night I ate my first full meal in days and this morning I feel fine. 
Next time I won't wait as long! A great little pill to always have with you."