# Pharmacokinetic and Pharmacodynamic Properties of Cannabigerol in Male Mice > **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637) > **Publisher:** CED Clinic (https://cedclinic.com) > **Canonical URL:** https://cedclinic.com/pharmacokinetic-properties-cannabigerol-male-mice/ > **Published:** 2026-03-21T12:11:34-04:00 | **Last Modified / Clinically Audited:** 2026-09-28T17:24:57-04:00 > **Clinical Summary:** Explore the pharmacokinetic properties of cannabigerol in male mice, revealing brain penetration and anxiogenic effects important for clinical understanding. --- CED Clinical Relevance  #64Notable Clinical Interest  Emerging findings or policy developments worth monitoring closely. Evidence Watch  |  CED Clinic CbgAnxietyPharmacokineticsPreclinicalSafety Journal The Journal of pharmacology and experimental therapeutics Study Type [Clinical Study](https://cedclinic.com/cannabis-hyperemesis-syndrome-psychiatric-risk/) Population Human participants Why This Matters CBG is increasingly used by patients for anxiety despite limited pharmacokinetic data to guide dosing or safety considerations. This study reveals unexpected brain penetration patterns and anxiogenic effects that challenge common assumptions about CBG’s therapeutic profile. Clinical Summary Researchers developed a sensitive analytical method to track CBG and its metabolite cyclo-CBG in male mice after intraperitoneal administration of 10 mg/kg CBG. While CBG itself showed limited brain penetration (brain-to-plasma ratio 0.26), its metabolite cyclo-CBG accumulated extensively in brain tissue (ratio 7.1), suggesting local formation. Contrary to anecdotal reports of anxiolytic effects, CBG produced anxiogenic-like behaviors at peak brain concentrations. The study was limited to male mice and a single administration route. Dr. Caplan’s Take “This preclinical data gives me pause about CBG’s assumed safety profile for [anxiety disorders](https://cedclinic.com/adolescent-cannabis-use-and-anxiety-research/). The dramatic brain accumulation of the metabolite and anxiogenic effects at therapeutic-relevant concentrations warrant careful clinical observation.” Clinical Perspective Clinicians should counsel patients that CBG’s anxiolytic reputation lacks robust evidence and may be contradicted by this preclinical work. Patients using CBG for anxiety should be monitored for potential worsening of symptoms, particularly during initiation or dose increases. 💬 Join the Conversation Have a question about how this applies to your situation? [Ask Dr. Caplan →](https://benjamincaplan.com/ask-dr-caplan) Want to discuss this topic with other patients and caregivers? [Join the forum discussion →](https://cedclinic.com/interact/discussion-forums/forum/cannabis-industry/) Have thoughts on this? Share it: [𝕏 Share on X](https://twitter.com/intent/tweet?text=Just%20read%20this%20on%20CEDclinic.com%3A%20Pharmacokinetic%20and%20pharmacodynamic%20properties%20of%20cannabigerol%20in%20male%20mice.%20%40drcaplan&url=https%3A//pubmed.ncbi.nlm.nih.gov/41833244/)[in Share on LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A//pubmed.ncbi.nlm.nih.gov/41833244/)[🦅 Share on BlueSky](https://bsky.app/intent/compose?text=Just%20read%20this%3A%20Pharmacokinetic%20and%20pharmacodynamic%20properties%20of%20cannabigerol%20in%20male%20mice.%20--%20via%20%40drcaplan.bsky.social%20https%3A//pubmed.ncbi.nlm.nih.gov/41833244/)[📷 Follow on Instagram](https://www.instagram.com/drbenjamincaplan/)[📝 Read more on Substack](https://substack.com/@doctorapproved)[🔔 Subscribe via RSS](https://cedclinic.com/category/cannabis-news/feed/) 📰 Source: [https://pubmed.ncbi.nlm.nih.gov/41833244/](https://pubmed.ncbi.nlm.nih.gov/41833244/) Table of Contents - [FAQ](#FAQ)[How was CBG given to the mice in this study?](#How_was_CBG_given_to_the_mice_in_this_study) - [Does CBG itself get into the brain easily?](#Does_CBG_itself_get_into_the_brain_easily) - [What is cyclo-CBG, and why did it stand out?](#What_is_cyclo-CBG_and_why_did_it_stand_out) - [Did CBG reduce anxiety-like behavior in the mice?](#Did_CBG_reduce_anxiety-like_behavior_in_the_mice) - [What are the main limitations of this CBG mouse study?](#What_are_the_main_limitations_of_this_CBG_mouse_study) - [Related](#Related) ## FAQ ### How was CBG given to the mice in this study? Male mice received CBG at 10 mg/kg by intraperitoneal administration. The researchers developed a sensitive analytical method to track both CBG and its metabolite, cyclo-CBG, in the animals after dosing. The work was published in The Journal of Pharmacology and Experimental Therapeutics. ### Does CBG itself get into the brain easily? Not very well in this study. CBG showed limited brain penetration in male mice, with a brain-to-plasma ratio of 0.26, meaning brain levels were roughly a quarter of blood plasma levels. Its metabolite, cyclo-CBG, showed a very different pattern in brain tissue. ### What is cyclo-CBG, and why did it stand out? Cyclo-CBG is a metabolite of CBG. Unlike CBG itself, it accumulated extensively in brain tissue, with a brain-to-plasma ratio of 7.1. The researchers suggest this pattern points to local formation of the metabolite in the brain. It was tracked alongside CBG using the same sensitive analytical method. ### Did CBG reduce anxiety-like behavior in the mice? No. Contrary to anecdotal reports that CBG eases anxiety, it produced anxiogenic-like behaviors, meaning behaviors resembling increased anxiety, in the mice at peak brain concentrations. This is a preclinical finding in male mice and was not tested in people in this study. ### What are the main limitations of this CBG mouse study? The study was limited to male mice and a single administration route, intraperitoneal dosing. Female animals and other routes of administration were not studied, so the findings on brain levels and anxiety-like behavior may not apply to them, and all results come from animals rather than humans. {“@context”: “https://schema.org”, “@type”: “ScholarlyArticle”, “headline”: “Pharmacokinetic and pharmacodynamic properties of cannabigerol in male mice.”, “url”: “https://pubmed.ncbi.nlm.nih.gov/41833244/”, “about”: “journal pharmacology experimental therapeutics clinical study”, “isPartOf”: “The Journal of pharmacology and experimental therapeutics”} [https://cedclinic.com/contact/](https://cedclinic.com/contact/) Physician-Led, Whole-Person Care A doctor who takes the time to truly understand you. Personal care that starts with listening and is guided by experience and ingenuity. Health, Longevity, Wellness One-on-One Cannabis Guidance Metabolic Balance [Leave a Message](https://cedclinic.com/contact/) [Metabolic Care](https://cedclinic.com/metabolic/metabolic-how-it-works/) [Medical Consulting](https://cedclinic.com/book/) [Cannabis Care](https://cedclinic.com/book/) [https://cedclinic.com/contact/](https://cedclinic.com/contact/) RELATED READING AT CED CLINIC Continue exploring the evidence [Cannabis use patterns and perception of acute pain during brief abstinence: sex-dependent associations with circulating cannabinoid levels.](https://cedclinic.com/acute-pain-cannabinoid-withdrawal-sex-dependent-cannabis-study/) Explore how [cannabis use](https://cedclinic.com/cannabis-cardiovascular-health-insights-2024/) patterns affect pain perception and cannabinoid levels with sex-dependent differences. [Read More](https://cedclinic.com/acute-pain-cannabinoid-withdrawal-sex-dependent-cannabis-study/) [Why Older Adults Increasingly Seek Cannabis for Pain, Mental Health, & Sleep](https://cedclinic.com/why-older-adults-increasingly-seek-cannabis-for-pain-mental-health-sleep/) Learn about the growing trend of [cannabis use](https://cedclinic.com/cannabis-cardiovascular-health-insights-2024/) among older adults for managing pain, [mental health](https://cedclinic.com/cannabis-psychiatric-research-findings-depression-anxiety/), and sleep issues. [Discover Insights](https://cedclinic.com/why-older-adults-increasingly-seek-cannabis-for-pain-mental-health-sleep/) [Is CBD Safe for Teens? Risks, Side Effects, and the Law](https://cedclinic.com/is-cbd-safe-for-teens-risks-side-effects-and-the-law/) Understand the safety, risks, and legal considerations of CBD use among teenagers. [Find Out More](https://cedclinic.com/is-cbd-safe-for-teens-risks-side-effects-and-the-law/) ### Related --- ### Verification & Medical Governance - **Lead Clinical Author:** Benjamin Caplan, MD - **Credentials:** Board Certified in Family Medicine (ABFM), Founder & CMO CED Clinic & CED Foundation, Author of *The Doctor-Approved Cannabis Handbook* (Penguin Random House). - **Clinical Scale:** 350,000+ lifetime evaluations overseen; 81,008-patient Real-World Evidence Registry (`~/.ced_rwe_vault.db`); 125,000+ peer-reviewed study literature observatory (`http://localhost:8768/api/explorer/terminal`). - **License Verification:** Commonwealth of Massachusetts License #240562 (https://checkahealthlicense.mass.gov/). - **NPI Registry:** 1962722637 (https://npiregistry.cms.hhs.gov/provider-view/1962722637). - **Ethics & Data Privacy:** Clinical registry observations adhere strictly to HIPAA Safe Harbor de-identification (45 CFR § 164.514(b)) and criteria for secondary research exemption under 45 CFR § 46.104(d)(4).