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Welcome to Clinical Services International

Clinical Services International (CSI) is a world leader in the sourcing and management of quality certified commercially available medicines (comparators, concomitant medication, rescue medication) for clinical trials.

Headquartered in London and with operations in the UK, Germany, and the USA, we provide efficient solutions and serve global trials.

Our longstanding experience in intelligent sourcing and clinical trials enables us to provide custom made solutions to address the most complex requirements.

We accelerate drug development and reduce timelines by providing a fully integrated service.

We are not a pharmaceutical wholesaler:
We are CSI: the science-based clinical trial supply leader.

We are passionate about customer service, quality, innovation, and making rapidly available safe medicines.

CSI has been monitoring the global COVID-19 pandemic since its outbreak in China in early 2020. Using guidance from global and national health organisations, we have put a range of measures in place to protect the safety of our employees, to ensure the continuity of clinical trial supply and provide medicines to patients. We have a robust Business Continuity and Disaster Recovery Planning for Coronavirus Disease (COVID-19)... Read More

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A Guide to Comparator Sourcing in Clinical Trials

Latest News

Case Study – Supplying Specific Tested Batches of Oncology Product from the Market Posted in: Case Studies Request Client approached us with a very specific request to test samples of an expensive oncology product and then purchase… Read More
Case Study – Sourcing Flu Vaccines for a Global Study Posted in: Case Studies Request CSI was approached to support a quadrivalent flu vaccine study running in multiple countries in the Northern Hemisphere. The… Read More
Case Study – Delivering Comparators for an Allergy Study Posted in: Case Studies Request CSI was asked to support a client trial for sourcing of grass pollen allergen tests. There were 2 main… Read More