Global comparator medicine supply for clinical trials
Clinical Services International (CSI) provides global comparator sourcing for clinical trials, with access to 15,000+ medicines through a network of 200+ manufacturers and suppliers worldwide.
Our approach
CSI takes a strategic approach to sourcing
Clinical Services International (CSI) provides reliable global sourcing of comparator medicines to support clinical trials across all phases of development. With access to more than 15,000 medicines through a network of over 200 manufacturers and suppliers worldwide, we help biotech, pharmaceutical and CRO organizations secure the comparator products they need, when they need them.
Our scientific team works closely with sponsors to develop sourcing strategies that reduce risk, maintain supply continuity and support regulatory compliance throughout the clinical trial lifecycle.
Whether your study requires branded originator medicines, biosimilars, concomitant medications or rescue therapies, CSI delivers compliant, fully documented supply solutions tailored to your programme.
CSI's Network in Numbers
15,000+
products supplied
1,200+
Clinical trials supplied overall
200+
Manufacturers and suppliers
60+
Countries with warehousing
OUR MOST REQUESTED COMPARATOR MEDICINES
Start with the medicine your protocol calls for
Each medicine has its own sourcing page covering presentations, markets, logistics and documentation. Filter by therapy area, or tell us what you need and we will build the strategy
CASE STUDY
Venetoclax and azacitidine across 17 countries, in record time
CSI streamlined combination supply for a global AML study spanning three continents, cutting supply lead times from four months to four weeks and letting patient enrolment begin ahead of schedule.
4 months
4 weeks
Supply lead time, first shipment to site
17
Countries
3
Continents
2
Coordinated products
Sourcing that supports the full trial
Comparator requirements can change throughout a clinical trial. Patient recruitment may accelerate, new sites may be added, and additional quantities may be needed months or even years after the initial supply.
CSI plans for these changes from the outset. We use demand forecasts to guide purchasing and establish reliable sourcing routes wherever possible, helping ensure the same comparator can be supplied consistently throughout the study.
Our project managers remain involved throughout the life of the trial, building knowledge of the protocol, site requirements and documentation from the start. When additional supply is needed, the team already understands what is required and can act quickly.
The result is a more predictable supply process, fewer last-minute sourcing challenges and less day-to-day supply management for your team.
Need a comparator medicine?
Whether you are sourcing Keytruda®, Opdivo®, Humira®, Eylea®, GLP-1s, Venetoclax and Azacitidine® or any other comparator medicine, CSI’s scientific team can develop a tailored sourcing strategy for your clinical programme. Read how CSI sources comparator drugs.
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