1. Pink Sheet
  2. >>Regulatory Trackers
  3. >>US FDA Performance Tracker

Alkermes’ Antipsychotic Combo Faces US FDA Questions On Metabolic Effects, Opioid-Related Safety

 
• By Sue Sutter

ALKS 3831, which combines olanzapine with the mu opioid receptor antagonist samidorphan, was associated with less weight gain compared to olanzapine alone but showed no benefit on metabolic parameters; in advisory committee briefing documents, agency raises theoretical safety concerns about drug’s opioid antagonistic effects in real-world settings.

Analog weight scale isolated
ALKS 3831 resulted in less weight gain compared to use of olanzapine alone. • Source: Shutterstock

The US Food and Drug Administration will ask its external experts to consider whether the olanzapine-related weight gain mitigated with Alkermes plc’s antipsychotic ALKS 3831 (olanzapine/samidorphan) is clinically meaningful, and whether the potential real-world risks associated with the drug’s opioid antagonist component can be addressed through labeling.

Read the full article – start your free trial today!

Join thousands of industry professionals who rely on Pink Sheet for daily insights

  • Start your 7-day free trial
  • Explore trusted news, analysis, and insights
  • Access comprehensive global coverage
  • Enjoy instant access – no credit card required
Start Free Trial

Already a subscriber?

More from US FDA Performance Tracker

AMR-Targeting Drug Secures EMA PRIME Designation

 
• By Neena Brizmohun

Antabio’s next-generation, broad-spectrum antibacterial, MEM-ANT3310, has made it onto the European Medicines Agency’s priority medicines scheme. The company says its product is designed to make a significant impact on the growing problem of antimicrobial resistance.

US FDA’s Review Performance Held Steady Despite Stormy First Quarter

 
• By Bridget Silverman

Organizational turmoil has not yet affected reviews of novel agent applications, with Q1 2025 approvals coming in low, but the first quarter share of the entire year is variable.

‘Pipeline In A Pill’ Or Pipe Dream? US FDA’s April Goal Dates Test Expansion Strategies

 
• By Bridget Silverman

Sanofi’s Dupixent, Amgen’s Uplizna, and Bristol’s Opdivo seek new indications, while J&J hopes to start a franchise with nipocalimab and Stealth’s day of reckoning approaches.

US FDA’s March Approval Candidates Take Aim At Established Markets

 
• By Bridget Silverman

March features nearly 20 user fee goal dates, including a crowd of novel candidates for crowded areas like hemophilia, heart disease and urinary tract infections, as well as the potentially first therapies for a rare eye disease and hyperphagia of Prader-Willi syndrome.

More from Regulatory Trackers

‘Pipeline In A Pill’ Or Pipe Dream? US FDA’s April Goal Dates Test Expansion Strategies

 
• By Bridget Silverman

Sanofi’s Dupixent, Amgen’s Uplizna, and Bristol’s Opdivo seek new indications, while J&J hopes to start a franchise with nipocalimab and Stealth’s day of reckoning approaches.

Global Pharma Guidance Tracker – February 2025

 
• By Vibha Sharma and Anabel Costa-Ferreira

Stay up to date on regulatory guidelines from around the world with the Pink Sheet's Guidance Tracker. The complete Global Pharma Guidance Tracker, with sortable and searchable listings going back to 2014, is available online.

EU CHMP Opinions And MAA Updates

 
• By Neena Brizmohun

This is an update of recommendations from the European Medicines Agency's Committee for Medicinal Products for Human Use on the authorization of new medicines in the EU, and updates on EU marketing authorization changes recommended by the CHMP.