nausea/vomiting
"Had kidney stone and given a Zofran prescription to take home for nausea - it only made it worse.  Every time I took it I found myself more nauseous after only 1/2 hour.  I chose to stop and had my doctor switch me to a different drug.  I think some people's systems are more sensitive to it than others, especially if they are taking pain medications with the Zoran."