I was on Ondansatron but had to be taken off of it due to it causing severe constipation and I started bringing up dark green bile and blood. So Cyclazine seems to be all they have left. All the others stopped working after a week or so. Feel like I'm loosing my mind, at home morw often than at work these days.
Yes, go back to the GP/hospital and ask for something else. Cyclizine did the same with me - worked brilliantly to start with, but after a few weeks the effect started wearing off. Doesn't mean another medication won't work. (Same thing happened with Stemetil and Metoclopramide, but at least they worked for a while, and then a combination of ondansetron and cyclizine worked and kept working.)
ive been on the same medication plus two others and non are working!! the sickness is getting quite bad (blood in sick due to frequency/acid) but havent been admitted once!! apparently my body isn't 'shutting down yet'. i feel your pain!!
I'd go back to GP/midwife/hospital ASAP. In the mean time, get some rehydration sachets n sip slowly or turn into ice lollies. I, touch wood, have not thrown up yet, but I have a phobia of vomit n would be a wreck in your shoes.
So for the first 15 weeks I have suffered serious hyperemesis and been admitted for fluid 3 times, (all of which were a fight to get me there as I am terrified of needles) For two weeks, I was feeling fine. But the past 3 days i have been throwing up, the same time every day, like clockwork regardless of what I eat. I'm currently on Cyclazine but as of tomorrow I will be all out of pills. I am terrified of how bad this might get without medication to keep it under control. At the end of my tether here