GOOGLE
metoclopamide search: "Liquid, Tablet, Dissolving Tablet
"Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.
"Take this medicine on an empty stomach, 30 minutes before each meal and at bedtime, unless your doctor tells you differently.
"Make sure your hands are dry before you handle the disintegrating tablet. Peel back the foil from the blister pack, then remove the tablet. Do not push the tablet through the foil. Place the tablet in your mouth. After it has melted, swallow or take a drink of water ..."
I would give your surgery a ring tomorrow or speak with a Pharmacist for advice. There is a note on the above to say that some people have motion problems initially. How much Domperidone do you take? I found Kwells as good for short term use though they did make me sleep
let us know how you get on!