Levosulpiride is derived from a medicine called Sulpiride. Levosulpiride which is the most effective form of Sulpiride, decreases the activity of a neurotransmitter (a substance that transmits signals in the brain) called dopamine. Apart from the brain, dopamine also acts on the digestive tract. Thus, by inhibiting dopaminergic effects, levosulpiride exerts anti-emetic (prevents vomiting), antipsychotic (used to treat schizophrenia) and increases gastrointestinal motility and allowing food to pass freely through the intestines.