Vomistop is ...

An anti-emetic medicine.  It is used to control nausea, vomiting and for the treatment of gastroparesis and indigestion.

Vomistop works by improving the contraction of muscles and movement in the stomach and intestine. Domperidone works best if taken before consuming food. This medicine is usually taken for short-term treatment thus, do not take this medicine when not required or when the symptoms subside. The most common side effect of this medicine is a dry mouth. However, it usually resolves once you stop taking this medicine