Liraglutide, a glucagon-like peptide 1 (GLP-1) receptor agonist used in diabetes and obesity, could alleviate depression through a pathway that does not depend on the GLP-1 receptor but instead on the gut microbiota, since the treatment increases the presence of the bacterium Lactobacillus delbrueckii. This symbiotic microorganism produces a lipid that modulates neuronal activity, normalizing the hyperactivation of brain regions in mice involved in emotional processing, which ultimately reduces depressive behaviors.

The quest by psychedelic drugs for full legitimacy in the pharmaceutical world has seen marked progress as well as (fewer) setbacks of late, and developers are hopeful that an important corner has been turned.

In a sea of uncertainty, a large-scale, long-term Swedish study is the first to show that people using GLP-1 receptor agonists are less likely to have worsening mental illness. The study involved a national cohort of 95,490 people diagnosed with depression or anxiety disorder, who also were treated with any diabetes drug (apart from insulin).

There is broad agreement that psychiatric diagnoses in their current form are not reflective of any underlying biology, and that this is one of the things hampering psychiatric drug development. “We are still fully reliant on descriptive diagnoses that yield heterogeneous patient cohorts,” Steve Hyman told the audience at the European Congress of Neuropsychopharmacology (ECNP) Roadmap Meeting on Precision Psychiatry in Amsterdam in January.

Any lingering disappointment in the delay for Xenon Pharmaceuticals Inc.’s readout of the phase III X-Tole2 study testing azetukalner in focal onset seizures (FOS) appeared thoroughly extinguished as the company’s K_V7 potassium channel opener yielded better-than-expected data, even besting earlier phase IIb findings and positioning the drug for an NDA submission later this year.

The effects of aging pose an additional challenge for people with HIV due to the neurological and psychological consequences that persist despite antiretroviral therapy. At the Conference on Retroviruses and Opportunistic Infections (CROI) held Feb. 22-25, 2026, in Denver, the scientific community examined how the virus affects the brain, how the reservoir is established in the CNS, and which genetic, immunological or treatment-related factors influence cognitive health.

Syremis Therapeutics Ltd. has launched with $165 million in series A funding to develop novel medicines for the treatment of mental health disorders.