My GP prescribed 4mg ondansetron which I took for about 10 days for extreme morning sickness. I had the dreaded constipation from it, but the last three days of not taking it I've had no normal bowel movements, just crazy diahorrea. I don't feel unwell so I'm assuming it's not gastro etc, but just a backlash from the zofran. Has anyone else had similar? Im 25 weeks and seeing my GP on Friday.