• Home
  • Store
    • Newsletter Subscriptions
    • Multimedia
    • Books
    • eBooks
    • ABPN SA Courses
    • Social Work Courses
  • CME Center
  • Multimedia
    • Podcast
    • Webinars
    • Blog
    • Psychiatry News Videos
    • Medication Guide Videos
  • Newsletters
    • General Psychiatry
    • Child Psychiatry
    • Addiction Treatment
    • Hospital Psychiatry
    • Geriatric Psychiatry
    • Psychotherapy and Social Work
  • FAQs
  • Med Fact Book App
  • Log In
  • Register
  • Welcome
  • Sign Out
  • Subscribe
Home » Lybalvi: The Diet Olanzapine

Lybalvi: The Diet Olanzapine

January 31, 2022
Chris Aiken, MD.
From The Carlat Psychiatry Report
Issue Links: Learning Objectives | Editorial Information | PDF of Issue
Chris Aiken, MD. Editor-in-Chief, The Carlat Psychiatry Report.

Lybalvi is a new combo pill that aims to overcome the dreaded metabolic effects of olanzapine by pairing it with the opioid antagonist samidorphan. Patients still gain weight on Lybalvi, though not as much as they do on olanzapine. In the three controlled trials that compared the two drugs, the weight gain on Lybalvi was 5 lb less at six months, 3 lb less at three months, and no different at one month (Srisurapanont M et al, Sci Rep 2021;11(1):7583).


Where the drug falls short is in comparison to metformin, which reduced weight gain on various antipsychotics by 7 lb compared with placebo in a meta-analysis of 10 trials, most of which lasted three months, at a dose range of 750–2000 mg/day (Mizuno Y et al, Schizophr Bull 2014;40(6):1385–1403). Moreover, metformin improved insulin sensitivity, hemoglobin A1C, dyslipidemia, and prolactinemia on antipsychotics, while Lybalvi improved none of these.


Lybalvi could also be compared with naltrexone, an opioid antagonist with a similar pharmacodynamic profile to samidorphan. Naltrexone has weaker evidence when it comes to reducing weight gain on antipsychotics, showing effectiveness in only one of two trials. However, the naltrexone trials enrolled patients with actual obesity (BMI > 30 kg/m2), while patients in the Lybalvi trials were barely overweight (BMI 18–30, mean 25). This may have made a difference, as Lybalvi tended to work better in patients with lower BMI.


Lybalvi is approved in schizophrenia and bipolar I disorder, although the studies were limited to schizophrenia. The drug does not seem to exacerbate psychosis or add to the side effect burden of olanzapine. The manufacturer also sought approval for schizophrenia with alcohol use disorder, but a negative phase II trial halted that pursuit. To prevent opioid withdrawal, Lybalvi should not be started within seven days of taking a short-acting opioid or 14 days of a long-acting one. Most insurers require documentation of significant weight gain on olanzapine or failure of two generic atypical antipsychotics to cover Lybalvi, which retails for $1300 per month.


TCPR’S TAKE
Metformin is preferred over Lybalvi for weight gain on antipsychotics, as it brings about more meaningful metabolic benefits beyond the reduction in BMI.

General Psychiatry
KEYWORDS antipsychotics metabolic-syndrome metformin news_of_note novel-drug obesity olanzapine side-effects waist-circumference weight-gain weight-loss-medications
    Aiken
    Chris Aiken, MD.

    Omega-3s and Metabolic Risks in Schizophrenia

    More from this author
    www.thecarlatreport.com
    Issue Date: February 1, 2022
    SUBSCRIBE NOW
    Table Of Contents
    An Off-Label Guide to Gabapentin
    Raising the Bar in Schizophrenia Treatment
    MDMA-Assisted Therapy for Severe PTSD
    Lumateperone in Bipolar Depression
    A Novel Treatment for Methamphetamine Use Disorder
    Lybalvi: The Diet Olanzapine
    CME Post-Test - Schizophrenia, TCPR, February 2022
    DOWNLOAD NOW
    Featured Book
    • MFB7e_Print_App_Access.png

      Medication Fact Book for Psychiatric Practice, Seventh Edition (2024) - Regular Bound Book

      The updated 2024 reference guide covering the most commonly prescribed medications in psychiatry.
      READ MORE
    Featured Video
    • KarXT (Cobenfy)_ The Breakthrough Antipsychotic That Could Change Everything.jpg
      General Psychiatry

      KarXT (Cobenfy): The Breakthrough Antipsychotic That Could Change Everything

      Read More
    Featured Podcast
    • shutterstock_2622607431.jpg
      General Psychiatry

      Should You Test MTHFR?

      MTHFR is a...
      Listen now
    Recommended
    • Join Our Writing Team

      July 18, 2024
      WriteForUs.png
    • Insights About a Rare Transmissible Form of Alzheimer's Disease

      February 9, 2024
      shutterstock_2417738561_PeopleImages.com_Yuri A.png
    • How to Fulfill the DEA's One Time, 8-Hour Training Requirement for Registered Practitioners

      May 24, 2024
      DEA_Checkbox.png
    • Join Our Writing Team

      July 18, 2024
      WriteForUs.png
    • Insights About a Rare Transmissible Form of Alzheimer's Disease

      February 9, 2024
      shutterstock_2417738561_PeopleImages.com_Yuri A.png
    • How to Fulfill the DEA's One Time, 8-Hour Training Requirement for Registered Practitioners

      May 24, 2024
      DEA_Checkbox.png
    • Join Our Writing Team

      July 18, 2024
      WriteForUs.png
    • Insights About a Rare Transmissible Form of Alzheimer's Disease

      February 9, 2024
      shutterstock_2417738561_PeopleImages.com_Yuri A.png
    • How to Fulfill the DEA's One Time, 8-Hour Training Requirement for Registered Practitioners

      May 24, 2024
      DEA_Checkbox.png

    About

    • About Us
    • CME Center
    • FAQ
    • Contact Us

    Shop Online

    • Newsletters
    • Multimedia Subscriptions
    • Books
    • eBooks
    • ABPN Self-Assessment Courses

    Newsletters

    • The Carlat Psychiatry Report
    • The Carlat Child Psychiatry Report
    • The Carlat Addiction Treatment Report
    • The Carlat Hospital Psychiatry Report
    • The Carlat Geriatric Psychiatry Report
    • The Carlat Psychotherapy Report

    Contact

    carlat@thecarlatreport.com

    866-348-9279

    PO Box 626, Newburyport MA 01950

    Follow Us

    Please see our Terms and Conditions, Privacy Policy, Subscription Agreement, Use of Cookies, and Hardware/Software Requirements to view our website.

    © 2025 Carlat Publishing, LLC and Affiliates, All Rights Reserved.