It doesn't work for everyone, but is a good place to start. Zofran wafers (dissolve under your tongue so you can take them if vomiting) are extremely effective in most patients, but aren't on the PBS, so cost about $55 for 10 wafers. But they can be a life-saver. Worked wonderfully for me in my 1st pregnancy, but didn't work at all with this current pregnancy...but that is unusual.
Try to keep your fluids up.