What is Metoclopramide API? Uses in GI Disorders

What is Metoclopramide API? Uses in GI Disorders

Last Updated: July 2026 | Reviewed against current pharmacopoeial and ICH guidance

Written for procurement teams, formulators and regulatory reviewers. Clinical use is summarised for context only; prescribing decisions sit with qualified clinicians, and documentation requirements vary by market and registration route.

TL;DR: Metoclopramide is an anti-emetic and prokinetic active pharmaceutical ingredient used in gastrointestinal disorders – diabetic gastroparesis, GERD, and chemotherapy- or surgery-related nausea and vomiting. It speeds gastric emptying by acting on dopamine and serotonin receptors. This guide covers what the API is, which GI conditions it treats, the pharmacopoeial grades it is supplied in, and what a buyer should check before sourcing it.

What Metoclopramide API Is

Metoclopramide API is a small-molecule active pharmaceutical ingredient in the anti-emetic and prokinetic class. Two forms are supplied:

The hydrochloride is the form most commonly used in oral and injectable formulations. It is a white to almost white crystalline powder, very soluble in water, freely soluble in ethanol and sparingly soluble in methylene chloride – a solubility profile that makes it straightforward to formulate as tablets, oral solutions and parenteral products.

In plain terms, metoclopramide does two things at once: it settles nausea and it gets a sluggish gut moving again. That combination is why it has stayed in clinical use for decades across several gastrointestinal indications.

How It Works, in Brief

Metoclopramide is a dopamine (D2) receptor antagonist with additional activity at serotonin receptors. Blocking D2 receptors in the brain’s chemoreceptor trigger zone suppresses the nausea signal; acting on the gut increases the strength and coordination of stomach and upper-intestinal contractions, so the stomach empties faster. The full receptor-level picture – including its 5-HT3 and 5-HT4 activity – is covered in our companion guide on the metoclopramide mechanism of action.

Uses in GI Disorders

Metoclopramide is used across several gastrointestinal conditions. The table below summarises the main ones.

Diabetic gastroparesis

This is the indication most associated with metoclopramide. In gastroparesis, the stomach empties too slowly, causing nausea, vomiting, bloating and a feeling of fullness after small meals. By restoring gastric motility, metoclopramide addresses the mechanical problem rather than just masking the symptom.

GERD and reflux

By tightening the lower oesophageal sphincter and accelerating gastric emptying, metoclopramide reduces the volume and frequency of reflux – useful where standard therapy has not fully controlled symptoms.

Nausea and vomiting

Its anti-emetic action makes it useful in chemotherapy and post-surgical settings. It does not increase gastric secretions, which is an advantage in the post-operative window.

A practical note for formulators: because these indications span oral tablets, oral solutions and injectables, the same API has to meet the specification demands of very different dosage forms. That puts a premium on batch-to-batch consistency at the API stage – one of the quality factors that also shapes what Metoclopramide API pricing looks like across suppliers.

Grades and Specification

Metoclopramide Hydrochloride is supplied against multiple pharmacopoeial monographs – IP, BP, Ph.Eur and USP – and Metoclopramide Base against Ph.Eur and BP. Which grade you need is driven by your destination market and dossier, so confirm it against your registration route before ordering.

A compliant Certificate of Analysis for the API should cover appearance, identification (IR), assay, related substances, residual solvents, heavy metals and loss on drying or water content, each against the named monograph. Reading that CoA properly is the highest-leverage check in the whole sourcing process.

Sourcing Metoclopramide API

The country a supplier sits in tells you nothing about the individual supplier. Run the same checks regardless:

• Certificates, read for scope. A WHO-GMP certificate is issued for a site against named products; an EU written confirmation is issued for a specific API. Read what each one actually covers.
• Documentation, in full. Batch-wise CoAs against a named monograph, impurity and stability data, and a clear answer on DMF status for your market.
• The right grade. IP, BP, Ph.Eur or USP as your dossier requires.

Bio-Synth has manufactured APIs since 1943 and operates from Balanagar, Hyderabad. The site holds WHO-GMP certification issued by the Drugs Control Administration, Government of Telangana, and ISO 9001:2015 certification, and manufacturing follows ICH Q7 principles. For Metoclopramide Hydrochloride specifically, Bio-Synth holds an EU Written Confirmation (WC-0274) covering the IP/USP grades – a product-specific document, not a facility-level one – and lists the API portfolio alongside its wider quality systems and API range.

FAQs

1. What is Metoclopramide API used for?

It treats gastrointestinal disorders where the stomach empties too slowly or nausea needs controlling – chiefly diabetic gastroparesis and GERD, plus chemotherapy- and surgery-related nausea and vomiting. It is both an anti-emetic and a prokinetic.

2. What is the CAS number of Metoclopramide?

Metoclopramide Hydrochloride is CAS 54143-57-6 (molecular weight 336.3 g/mol); Metoclopramide Base is CAS 364-62-5 (molecular weight 299.8 g/mol).

3. Which pharmacopoeial grades are available?

Metoclopramide Hydrochloride is supplied to IP, BP, Ph.Eur and USP; Metoclopramide Base to Ph.Eur and BP. Confirm the grade your registration route requires before ordering.

4. Is metoclopramide an anti-emetic or a prokinetic?

Both. It suppresses nausea by blocking dopamine receptors in the brain and speeds gastric emptying by acting on the gut – which is why it is used in conditions that combine nausea with delayed motility.

5. What should a buyer check before sourcing Metoclopramide API?

The certificate scope (site vs product), a full CoA against the named monograph, impurity and stability data, DMF status for the target market, and batch-to-batch consistency across the dosage form you are formulating.