Interactive Response Technology (IRT)

Backed by the industry’s most experienced IRT designers and RTSM specialists, Calyx IRT is the solution you can rely on to deliver optimized randomization and trial supply management (RTSM) strategies that keep trials on track, even when they don’t go according to plan – and they never go according to plan.



Effective RTSM, built on 30 years of experience.









Evolving and Innovating IRT

Having evolved from its early beginnings as ClinPhone™, Calyx IRT is a robust and adaptable platform designed to tackle any RTSM challenge.

Since 1993, the world’s leading biopharmaceutical companies and CROs repeatedly turn to Calyx to meet their RTSM needs. That’s 30 years of experience built into the technology, processes, and people who understand what’s needed to remove RTSM burdens and reduce your trial risks.

Any design. Any complexity.

Calyx IRT’s core of pre-validated functions are designed to support all trial needs, covering study, site and subject management, randomization and dosing, and trial supply management from lot release to destruction.

We customize our IRT to best meet the needs of each study and protocol. And we match every protocol design, with no limits to the level of complexity we can accommodate.

Learn Calyx’s approach to meeting all your RTSM needs and why you can rely on the expertise behind Calyx IRT to help you:


Proven. Adaptable. Trusted.

Whether your trial is simple or complex, local or global, with 50 patients or 5,000, you can rely on Calyx’s industry-proven IRT system and experienced professionals to deliver the highest quality RTSM solution to drive your trial’s success.

Chart with Labeled Legend

Experience Matters.

Calyx’s breadth of experience across all protocol designs, phases, and therapeutic areas translates into a reliable IRT system designed to meet your trial needs and mitigate risks. Not just the risks you may expect, but those we anticipate.

Our RTSM specialists leverage their combined 92 years of IRT experience to advise how to best implement trial designs and account for planned or unplanned trial scenarios. They work with you to design an IRT solution based on a comprehensive understanding of your protocol, packaging plan, recruitment rates, and ongoing study needs.

The result? An adaptable, flexible, and reliable system ready to meet your current and future trial challenges.


Expert Support for the Life of Your Trial

Our dedicated team of RTSM specialists remain involved in each study until its closure, addressing the inevitable issues you’ll face during the running of a trial, from recruitment delays to drug shortages to protocol amendments.


Learn the Calyx Difference

Our expertise is in overcoming challenges that affect clinical trials.

We relied heavily on Calyx’s IRT expertise and followed their recommendations for overcoming our studies’ challenges, resulting in a solution that perfectly met our RTSM needs for two complex gout trials.
LG Chem

Younghwan Jang

Professional / Study Lead
We’re pleased to partner with Calyx and are confident that our customers will benefit from the scientific, medical, and clinical expertise they have honed during their 30 years of delivering reliable eClinical solutions to the clinical development industry.

Christy Meyer

Director / Quality Assurance
We chose to partner with Calyx due to their tenured scientific, medical, and technical teams who possess a depth and diversity of experience in providing reliable data outcomes.

Tiepu Liu

President, Global Biometrics

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