Metoclopramide Orion (Metoclopramide Hydrochloride)

• Metoclopramide acts on dopaminergic pathways to control nausea, vomiting and gastric motility.
• Nausea and vomiting: reduces the frequency and severity of episodes by antagonizing central dopamine receptors involved in the emetic reflex.
• Gastroparesis: enhances gastric emptying and improves lower esophageal sphincter tone, thereby alleviating symptoms of delayed stomach emptying such as early satiety and bloating.
• Postoperative nausea and vomiting: prevents and treats nausea and vomiting that occur after surgical procedures, supporting patient recovery and comfort.

• Metoclopramide exerts its effect primarily through selective antagonism of dopamine D2 receptors in the chemoreceptor trigger zone and gastrointestinal tract. By blocking these receptors, it enhances acetylcholine release, stimulating smooth‑muscle contraction and increasing gastric motility. The drug also raises the tone of the lower esophageal sphincter and exerts a modest serotonergic (5‑HT4) agonist activity, contributing to its pro‑kinetic and anti‑emetic actions.

Metoclopramide may cause a range of adverse reactions, which are categorized by frequency and severity.

Common Side Effects

• Drowsiness
• Fatigue
• Restlessness or agitation
• Diarrhea
• Headache
• Dizziness

Serious or Rare Side Effects

• Extrapyramidal symptoms (e.g., acute dystonia, akathisia)
• Tardive dyskinesia with long‑term use
• Neuroleptic malignant syndrome
• Depression or suicidal thoughts

• When prescribing Metoclopramide Orion, clinicians should consider several safety measures.
• Assess renal and hepatic function before initiating therapy: adjust use in impairment.
• Monitor for extrapyramidal symptoms: discontinue if severe.
• Avoid in patients with known seizure disorders: risk of lowering seizure threshold.
• Use with caution in the elderly: increased sensitivity to CNS effects.
• Contraindicated in patients with known hypersensitivity to metoclopramide or other dopamine antagonists: discontinue immediately.
• Store at ambient temperature: keep in the original packaging, protect from moisture and direct sunlight.

Metoclopramide Orion can interact with other medicines; some combinations should be avoided while others require monitoring.

Major Interactions (Avoid)

• Antipsychotics (e.g., haloperidol, chlorpromazine): additive dopamine blockade may increase side effects.
• Monoamine oxidase inhibitors (MAOIs): risk of hypertensive crisis.
• CNS depressants (e.g., benzodiazepines, opioids): enhanced sedation and respiratory depression.

Moderate Interactions (Monitor Closely)

• Opioid analgesics: may potentiate nausea or sedation.
• Selective serotonin reuptake inhibitors (SSRIs) and tricyclic antidepressants: possible increased risk of serotonin syndrome.
• Anticholinergic agents: may reduce pro‑kinetic efficacy.
• CYP2D6 inhibitors (e.g., fluoxetine, quinidine): may increase metoclopramide plasma levels.