The source guarantees that they can provide what they need, at a good price and on time. But then there may be issues with the delivery, queries around the batch, and urgent document requirements from the study site.

Depending on how your comparator source deals with these issues can make a big difference.

Comparator sourcing can be quite complex for Pharma sponsors and CROs. It is important to have good communication, documentation, order tracking, and issue resolution.

So how can you assess a comparator sourcing partner?

Why Supplier Reliability Matters in Comparator Sourcing

Clinical trials operate within defined treatment schedules. Delayed comparator drug supply can affect site readiness, while missing documentation may complicate customs clearance or quality reviews.

Problems become harder to manage when suppliers provide limited updates.

A responsive partner communicates what has happened, explains what is being investigated, and identifies the next steps. Early warnings give sponsors more time to assess alternatives.

For additional context, read Neunco’s article on common clinical trial supply delays and how to address them.

Five Factors to Evaluate When Choosing a Comparator Sourcing Partner

1. Communication and Accountability

Who will manage your order?

A good supplier should have clear lines of communication, clear roles and responsibilities, and a named contact.

How quickly will they respond to your queries? How will they handle urgent requests? What is their escalation process?

While a quick response is good to have, it is more important that they can provide accurate information and clear action.

2. Tracking Orders

There are several steps involved in comparator sourcing for clinical trials, including co-ordinating with suppliers, verifying the product, documentation and delivery.

The sponsor should know how they will track progress.

Can they track the status of orders? Will they notify you of any changes to the shipment? Can they identify what is still required before dispatch?

This helps the procurement team to work with the study sites and plan for any issues.

3. Documentation and Product Traceability

A commercially available comparator is not automatically suitable for clinical trial use.

Sponsors must establish which product certificates, batch-related documents, and traceability records are required and available.

Requirements vary by sourcing country, destination, and study specifications.

The European Commission’s guidance on Good Manufacturing and Distribution Practices provides information on relevant pharmaceutical quality and distribution standards.

Before ordering, confirm documentation responsibilities and expected turnaround times.

4. Issue Escalation and Resolution

What would happen if the comparator was shipped with a temperature deviation?

Who will investigate this deviation? How quickly will the sponsor be notified? Who decides whether the product can be released?

A reliable supplier should have a process in place to escalate, document, and coordinate any quality issue.

Not necessarily expecting you to have zero issues, but having a process in place to manage any issues that do arise.

5. Alternative sourcing / Distribution

What happens if the comparator cannot be sourced?

An experienced sourcing partner should be able to look at alternative markets, suitable suppliers, and sourcing routes.

Any alternative must meet the study’s specifications and applicable regulatory requirements.

How Neunco Supports Reliable Comparator Sourcing

Neunco provides Comparator and Reference Listed Drug (RLD) Sourcing services for pharmaceutical sponsors and CROs.

Its capabilities include country-specific procurement, single- and multiple-batch requirements, specific batch numbers, varying pack quantities, and longer remaining shelf-life options.

Neunco’s project management team supports the comparator order cycle, from understanding requirements and evaluating sourcing routes to coordinating procurement.

Clients also have access to an order-status tracking system, helping them monitor sourcing progress.

For storage, Neunco has an EU GDP-certified warehouse in the Netherlands and a licensed distribution centre in New Jersey, USA. Its global distribution services support international shipments through qualified logistics partners.

Sponsors can discuss documentation expectations, communication arrangements, and escalation procedures with Neunco before confirming their requirements.

Choose a Comparator Supplier Beyond Price

Competitive pricing and product availability are important, but they do not tell the whole story.

When evaluating a comparator sourcing partner, consider how it manages documentation, communicates delays, provides order visibility, and responds to unexpected challenges.

These capabilities help sponsors assess whether a supplier can support changing study requirements throughout procurement.

A reliable partnership is built not only on successful orders, but also on how effectively problems are addressed.