Metoclopramide Injection 5 mg/mL

Description

Metoclopramide Injection 5 mg/mL is a sterile solution containing Metoclopramide Hydrochloride, designed for intravenous (IV) or intramuscular (IM) administration. It is a potent dopamine receptor antagonist and prokinetic agent, meaning it effectively blocks certain dopamine receptors in the brain to reduce nausea and vomiting, and also enhances the movement (motility) of the upper gastrointestinal tract. The injectable form allows for a rapid onset of action, making it ideal for acute and severe situations where quick relief is needed.

Advantages

Rapid Onset of Action: Achieves therapeutic effects quickly due to direct administration into the bloodstream (IV) or muscle (IM), bypassing slower oral absorption.
Powerful Antiemetic: Highly effective in preventing and treating various types of severe nausea and vomiting, including chemotherapy-induced, post-operative, and migraine-associated.
Strong Prokinetic Effect: Promotes rapid gastric emptying and intestinal transit, which is beneficial for conditions like diabetic gastroparesis and for facilitating certain diagnostic procedures.
Emergency Use: Crucial for acute and severe situations where immediate control of symptoms is necessary.
Reliable Bioavailability: Ensures that the full dose is available to the body, overcoming potential issues with oral absorption.

Uses

Metoclopramide Injection 5 mg/mL is primarily used for acute and severe conditions requiring rapid and potent antiemetic or prokinetic effects:

Prevention of Post-Operative Nausea and Vomiting (PONV): Commonly used to prevent nausea and vomiting after surgery.
Symptomatic Treatment of Nausea and Vomiting: Including nausea and vomiting associated with acute migraine.
Prevention of Radiotherapy-Induced Nausea and Vomiting (RINV): To mitigate nausea and vomiting caused by radiation therapy.
Diabetic Gastroparesis: Symptomatic treatment of delayed stomach emptying in diabetic patients, relieving nausea, vomiting, heartburn, and bloating.
Chemotherapy-Induced Nausea and Vomiting (CINV): Prevention of delayed CINV (as a second-line option, especially in children aged 1-18 years) and immediate CINV.
Facilitating Diagnostic Procedures: To speed up gastric emptying and intestinal transit of contrast agents (e.g., barium) during radiological examinations or to aid in small bowel intubation.

Nature

Metoclopramide is a dopamine D2 receptor antagonist. Its multifaceted mechanism of action contributes to its antiemetic and prokinetic properties:

Antiemetic Action: It blocks dopamine D2 receptors in the chemoreceptor trigger zone (CTZ) in the brain’s area postrema. The CTZ is a key region that detects toxins and other emetic stimuli and relays signals to the vomiting center. By blocking dopamine here, metoclopramide prevents the initiation of the vomiting reflex. It also exhibits some antagonism at 5-HT3 (serotonin) receptors at higher doses, which further contributes to its antiemetic effects.
Prokinetic Action: Metoclopramide enhances the release of acetylcholine from nerve endings in the gastrointestinal tract. Acetylcholine is a neurotransmitter that promotes muscle contraction in the gut. This leads to increased tone and amplitude of gastric (stomach) contractions, relaxation of the pyloric sphincter (the valve between the stomach and small intestine), and increased peristalsis (wave-like muscle contractions) in the duodenum and jejunum (parts of the small intestine). This combined action accelerates gastric emptying and onward movement of contents.

It does not significantly affect gastric or biliary secretions. The injectable form ensures that these actions begin very quickly, within 1-3 minutes for IV administration and 10-15 minutes for IM administration.

Storage

Controlled Room Temperature: Store Metoclopramide Injection 5 mg/mL at controlled room temperature, generally between 20°C to 25°C (68°F to 77°F). Some products may allow storage up to 30°C.
Protect from Light: Keep the ampoules or vials in their original carton or outer packaging to shield them from light, which can cause degradation of the active ingredient.
Do Not Freeze: Freezing can compromise the integrity and effectiveness of the solution.
Discard Unused Portion: This product is typically supplied in single-dose vials or ampoules. Any unused solution should be discarded immediately after opening, as it usually contains no preservatives and is susceptible to contamination.
Keep Out of Reach of Children: Store the medication in a secure place, well out of the sight and reach of children and pets.
Check Expiry Date: Always check the expiry date on the packaging. Do not use the injection beyond this date.