Metoclopramide Noridem (Metoclopramide Hydrochloride Monohydrate)

Metoclopramide is an antiemetic and gastroprokinetic that modulates dopaminergic and serotonergic pathways to relieve symptoms.

• Nausea and vomiting: Reduces frequency and intensity of acute and delayed episodes in various clinical settings.
• Post‑operative nausea: Improves recovery by decreasing vomiting after surgical procedures.
• Chemotherapy‑induced nausea: Mitigates both early and delayed emesis associated with cytotoxic agents.
• Gastroparesis: Enhances gastric emptying and alleviates related dyspeptic symptoms.

• Metoclopramide blocks dopamine D2 receptors in the chemoreceptor trigger zone and throughout the gastrointestinal tract, which diminishes nausea signaling and increases gastric motility. It also antagonizes serotonin 5‑HT3 receptors and acts as a 5‑HT4 receptor agonist, further promoting coordinated peristalsis and accelerating gastric emptying. These combined actions restore normal upper‑GI transit and suppress emetic signals to the brainstem, thereby improving patient comfort during treatment.

Metoclopramide may cause a range of adverse reactions, varying from mild to severe.

Common Side Effects

• Drowsiness: Feeling of sleepiness or reduced alertness.
• Fatigue: Generalized lack of energy.
• Restlessness: Involuntary movements or agitation.
• Diarrhea: Loose or watery stools.
• Headache: Mild to moderate cranial pain.
• Dizziness: Sensation of light‑headedness or imbalance.

Serious or Rare Side Effects

• Extrapyramidal reactions: Involuntary muscle contractions or dystonia.
• Tardive dyskinesia: Persistent, potentially irreversible facial or limb movements.
• Neuroleptic malignant syndrome: Life‑threatening hyperthermia with muscle rigidity.
• Severe allergic reaction: Anaphylaxis, rash, or swelling.
• Cardiac arrhythmia: Irregular heart rhythm, especially with high doses.
• Depression or suicidal thoughts: Mood changes requiring immediate medical attention.

Before initiating therapy, clinicians should evaluate patient-specific factors and monitor for known risks.

• Renal or hepatic impairment: Adjust monitoring as drug is metabolized hepatically and excreted renally.
• Extrapyramidal symptoms: Observe for muscle rigidity, tremor or abnormal movements.
• Hypersensitivity: Discontinue if allergic reactions such as rash or anaphylaxis occur.
• Elderly patients: Use cautiously due to increased susceptibility to side effects.
• Depression or suicidal ideation: Assess mental health status prior to use.
• Store at ambient temperature: Keep in original container, protect from moisture and light.

Metoclopramide can alter the effect of several medicines; some combinations should be avoided while others require close observation.

Major Interactions (Avoid)

• Antipsychotics (e.g., haloperidol): May increase risk of extrapyramidal symptoms.
• Monoamine oxidase inhibitors: Can potentiate hypertensive reactions.
• CNS depressants (e.g., opioids, benzodiazepines): Enhance sedation and respiratory depression.

Moderate Interactions (Monitor Closely)

• CYP2D6 inhibitors (e.g., fluoxetine, quinidine): May raise metoclopramide plasma levels.
• Other antiemetics (e.g., ondansetron): Potential additive serotonergic effects.
• Antidepressants (e.g., SSRIs, tricyclics): May increase risk of serotonin syndrome.
• Antihistamines: Can augment drowsiness.