Uploaded December 2025 | Updated September 2026, 2 weeks ago
Dr. Ryan Vandrey is a professor of Psychiatry and Behavioral Sciences at John’s Hopkins. Dr. Johannes Thrul is an Associate Professor at John’s Hopkins.
They both work for the Cannabis Health & Research Initiative, which is a collaboration between two organizations with years of experience in medicinal cannabis research: Johns Hopkins University and Realm of Caring. Simply put, CHRI is a platform of data collection and dissemination focused on the health outcomes of medicinal cannabis at the patient level, and they have created a number of valuable resources to help cannabis medicine researchers, including:
- A data repository that contains de-identified data collected through CHRI
- Research Library that contains more than 3000 published scientific articles related to the health effects of cannabis
- A set of validated questionnares that clinicians can use when speaking to patients about cannabis
- and more
The CHRI is also currently recruiting participants for their National Cannabis Study, which is a collection of firsthand experiences with medicinal cannabis among individuals with various health conditions. Specifically, they are looking for participants who plan to use cannabis but have not yet started cannabis use. So if that’s you or someone you know, we highly suggest you consider participating in the study because the research has the potential to impact best practices in healthcare and the cannabis industry.
During our conversation, Ryan and Johannes shared more details about the CHRI and the National Cannabis Study, and I think you will agree that their mission aligns perfectly with the CannMed Community.
Thanks to This Episode's Sponsor: Realm of Caring
Founded in 2013, Realm of Caring (RoC) serves anyone in need of more information about cannabinoid therapies. Through revolutionary CBD and Cannabis research, innovative education, and life-changing grants, RoC seeks to facilitate and encourage the mainstream acceptance of transformative, plant powered therapies to benefit individuals and families and serve healthcare providers as well as the hemp and cannabis industries.
Learn more at RealmofCaring.org
Additional Resources
- Cannabis Health Research Initiative website - cannabisandhealth.org
Dr. Ryan Vandrey is a professor of Psychiatry and Behavioral Sciences at John’s Hopkins. Dr. Johannes Thrul is an Associate Professor at John’s Hopkins.
They both work for the Cannabis Health & Research Initiative, which is a collaboration between two organizations with years of experience in medicinal cannabis research: Johns Hopkins University and Realm of Caring. Simply put, CHRI is a platform of data collection and dissemination focused on the health outcomes of medicinal cannabis at the patient level, and they have created a number of valuable resources to help cannabis medicine researchers, including:
- A data repository that contains de-identified data collected through CHRI
- Research Library that contains more than 3000 published scientific articles related to the health effects of cannabis
- A set of validated questionnares that clinicians can use when speaking to patients about cannabis
- and more
The CHRI is also currently recruiting participants for their National Cannabis Study, which is a collection of firsthand experiences with medicinal cannabis among individuals with various health conditions. Specifically, they are looking for participants who plan to use cannabis but have not yet started cannabis use. So if that’s you or someone you know, we highly suggest you consider participating in the study because the research has the potential to impact best practices in healthcare and the cannabis industry.
During our conversation, Ryan and Johannes shared more details about the CHRI and the National Cannabis Study, and I think you will agree that their mission aligns perfectly with the CannMed Community.
Thanks to This Episode's Sponsor: Realm of Caring
Founded in 2013, Realm of Caring (RoC) serves anyone in need of more information about cannabinoid therapies. Through revolutionary CBD and Cannabis research, innovative education, and life-changing grants, RoC seeks to facilitate and encourage the mainstream acceptance of transformative, plant powered therapies to benefit individuals and families and serve healthcare providers as well as the hemp and cannabis industries.
Learn more at RealmofCaring.org
Additional Resources
- Cannabis Health Research Initiative website - cannabisandhealth.org










![Demystifying Cannabinoid Hyperemesis Syndrome with Codi Peterson, PharmD
Dr. Codi Peterson is a pediatric pharmacist with over a decade of experience specializing in acute care and pediatric emergency medicine. He currently serves as a clinical pharmacist at Radys Childrens Health of Orange County, where he works night shifts in the Emergency Department and applies his expertise to optimize medication safety and therapeutic outcomes in children. Beyond the hospital, Codi is deeply committed to education and mentorship. He is an Associate Clinical Professor at the University of California, Irvine, where he teaches cannabis pharmacology and therapeutics, and a guest lecturer at OCEMT, instructing paramedics and firefighters in applied pharmacology.
He is also an active researcher on Cannabinoid Hyperemesis Syndrome (CHS), having led one of the largest patient surveys on the condition to date. At CannMed 26, Codi will share the results of that study in a presentation titled, “Through the Eyes of a Patient: Integrating Story and Science to Demystify CHS”.
During our conversation, we discuss:
- Defining CHS and explaining why it is difficult to research
- Cannabis use patterns among CHS sufferers
- Whether contaminants and pesticides play a role in developing CHS
- The prodromal phase and early warning signs of CHS
- Sex-based differences in CHS patients
- Understanding the biological mechanisms behind the development of CHS
- and more
Thanks to This Episodes Sponsor: The Cannigma
The Cannigma takes an evidence-based approach to cannabis content – from safety to cooking to medical research – and makes all the information digestible and useful.
They are committed to making sure scientific information is accessible to anyone who needs it – be it to relieve their own suffering or that of a loved one, to learn a bit more, or even just for fun.
Learn more at cannigma.com
Additional Resources
- Surveying Cannabinoid Hyperemesis Syndrome Patients with Megan Mbengue and Codi Peterson [Video] - https://youtu.be/ez7PyEESrSU
- Cannabinoid Hyperemesis Syndrome What You Need to Know [Video] - https://youtu.be/9hCp6puJvXc?si=Gc14ELLhC3S5KOBL
- what-is-chs.com
- Codi on IG - https://www.instagram.com/cannabispharmd/
- Codi on LinkedIn - https://www.linkedin.com/in/cannapharmd/
- The Cannigma - cannigma.com
- Register for CannMed 26 - Early Bird Ends February 20th! - https://cannmedevents.com/package-options/ Demystifying Cannabinoid Hyperemesis Syndrome with Codi Peterson, PharmD](https://i.ytimg.com/vi/bIZi75xoUyk/mqdefault.jpg)