Reglan® - U.S. /Maxeran® Canada (Metoclopramide)
This drug is a dopamine antagonist which is beneficial in the GI tract where dopamine inhibits motility. It stimulates and coordinates esophageal (esophagus), gastric (stomach), pyloric (valve between the stomach and small intestine), and duodenal (small intestine) peristalsis. Peristalsis refers to the smooth, rhythmic muscle contractions that cause food to pass through the digestive tract. It also works to increase lower esophageal sphincter (LES) tone and stimulates gastric contractions. Unfortunately, metoclopramide crosses the blood-brain barrier which can cause negative (and if not discontinued-possibly irreversible) side effects such as involuntary muscle spasms, motor restlessness, and inappropriate aggression. These side effects are more common in long term use (12 or more months).

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Motilium® - (Domperidone)
Motilium is currently not available in the U.S. This drug is also a dopamine antagonist; however, domperidone does not cross the blood-brain barrier so it does not have the undesirable side effects that metoclopramide may. It works to increase esophageal peristalsis, LES pressure and gastric contractions.

Erythromycin
An antibiotic with the side effect of increasing gastric motility. This is currently being widely used in low doses (not the higher antibiotic doses) for delayed gastric emptying as this does not have the unfortunate side effects that are possible with metoclopramide.

Urecholine® (Bethanchol)
Urecholine is used to treat urinary and bladder problems. It helps to empty the bladder and often stimulates gastric motility, increases gastric tone, and restores rhythmic peristalsis improving gastric emptying time.