New Evidence Suggests GLP-1 Drugs May Improve Survival in Severe Psychiatric Disorders

Key Takeaways: 

• People living with serious mental illnesses experience substantial excess cardiometabolic risk and premature mortality, driven largely by cardiovascular disease rather than psychiatric symptoms alone.
  
• GLP-1 receptor agonists may help narrow this mortality gap by targeting obesity, diabetes, cardiovascular disease, and renal disease rather than replacing established psychiatric treatments.
  
• While promising, the use of GLP-1 receptor agonists in people with serious mental illness requires careful attention to safety, access, cost, and equitable allocation.
  
  
  

A recent editorial published in Expert Opinion on Pharmacotherapy explored the emerging role of glucagon-like peptide-1 receptor agonists in improving survival and long-term health outcomes for people living with serious mental illnesses. The authors emphasised that these medicines are unlikely to replace established psychiatric therapies. Instead, their greatest potential lies in addressing the cardiometabolic drivers of excess morbidity and mortality that disproportionately affect this population.

The editorial situates GLP-1 receptor agonists within a broader public health context, arguing that interventions capable of extending healthspan and reducing cardiovascular mortality are urgently needed for people with serious mental illness.

Development and expanding indications of GLP-1 receptor agonists

The first GLP-1 receptor agonist, exenatide, received approval from the United States Food and Drug Administration in 2005 for the treatment of type 2 diabetes. Since that time, multiple GLP-1 mono-agonists have been approved, alongside tirzepatide, the first dual agonist targeting both the GLP-1 and glucose-dependent insulinotropic polypeptide receptors. Additional dual and triple agonists acting on GLP-1, GIP, and glucagon receptors are now in late-stage clinical development.

While initially developed for glycaemic control in type 2 diabetes, GLP-1 receptor agonists now have indications that extend well beyond glucose lowering and weight management in people living with overweight or obesity. Approved uses include treatment of metabolic dysfunction-associated steatohepatitis in people with moderate or advanced fibrosis, management of obstructive sleep apnoea in adults with obesity, reduction of major adverse cardiovascular events in adults with type 2 diabetes and established cardiovascular disease, and slowing the progression of chronic kidney disease while reducing cardiovascular mortality in people living with both chronic kidney disease and type 2 diabetes.

Oral formulations are also expanding. Oral semaglutide is already available, and synthetic small-molecule oral GLP-1 receptor agonists are expected to receive approval in 2026. These formulations may help address barriers related to injectable delivery, manufacturing complexity, supply chains, and access. There is now broad consensus that GLP-1 receptor agonists have transformed the management of metabolic disease and are associated with reductions in renal disease progression, cardiovascular events, and mortality among people with metabolic disorders.

Cardiometabolic burden in serious mental illness

Conditions such as schizophrenia, major depressive disorder, bipolar disorder, and related serious mental illnesses are severe, prevalent, and often lifelong. They are major contributors to disability, reduced healthspan, and diminished social and economic participation, particularly among younger adults.

People living with serious mental illness experience markedly premature and excess mortality. Estimates of years of life lost typically range from five to twenty-five years, with cardiovascular disease accounting for the majority of this gap. Earlier onset of cardiometabolic conditions, higher prevalence of obesity and diabetes, and cumulative exposure to cardiometabolic risk factors all contribute to this disparity.

Each condition currently treated with GLP-1 receptor agonists contributes differently to cardiometabolic risk in this population. In parallel, several agents in mid- and late-stage development target chronic diseases such as peripheral artery disease and atherosclerotic heart disease, conditions that disproportionately affect people living with serious mental illness.

Limitations of current psychiatric treatments on mortality

Although antipsychotics, antidepressants, mood stabilisers, and anticonvulsants are clinically effective for managing psychiatric symptoms, their impact on healthspan and cardiovascular mortality has been limited. Demonstrated reductions in mortality have been confined to selected classes and agents, including second-generation long-acting antipsychotics, lithium, and clozapine.

Lithium, despite strong evidence of efficacy in bipolar disorder and potential mortality benefits, remains under-prescribed. This limits its overall public health impact and underscores the need for complementary strategies that directly address physical health outcomes alongside psychiatric symptom control.

Current and emerging clinical applications in psychiatric populations

GLP-1 receptor agonists are already recommended for managing weight gain associated with psychotropic medications when discontinuation or switching of psychiatric treatment is not feasible. This indication is particularly relevant given the high prevalence of medication-associated weight gain in people living with serious mental illness.

Preliminary evidence also suggests a potential protective effect against lithium-induced nephrotoxicity, a complication for which no approved therapy currently exists. In addition, several GLP-1 receptor agonists are being developed or repurposed for the treatment of alcohol, tobacco, and opioid use disorders.

Beyond metabolic outcomes, preclinical studies, small controlled trials, and observational research suggest that GLP-1 receptor agonists may exert beneficial effects on mood disorders and on specific psychopathology domains that significantly impair quality of life, including cognitive dysfunction and anhedonia. While these findings remain early, they point to possible neuropsychiatric benefits that warrant further investigation.

Safety considerations in people living with serious mental illness

Several safety considerations are particularly relevant in this population. Gastrointestinal side effects, including constipation, may interact with pre-existing gastrointestinal motility disturbances caused by psychotropic medications.

Clinicians should also consider the elevated risks of pancreatitis and sarcopenia, both of which disproportionately affect people living with serious mental illness. Renal function requires particular attention, as GLP-1 receptor agonists that are primarily renally eliminated, such as lixisenatide and exenatide, are contraindicated in severe renal disease, which is more prevalent in this group.

Early pharmacovigilance reports raised concerns about a possible association between GLP-1 receptor agonists and suicidality. However, larger subsequent studies have not demonstrated a causal relationship. Continued monitoring remains advisable, particularly in populations already at increased risk of suicidal ideation and behaviour.

Implications for healthspan and mortality reduction

People living with serious mental illness account for a disproportionate share of years of life lost and disability-adjusted life years worldwide. Despite decades of progress in psychopharmacology, the mortality gap between this population and the general population has not meaningfully narrowed.

Therapeutic strategies that directly reduce mortality and extend healthspan are therefore urgently required. In this context, GLP-1 receptor agonists represent one of the most promising pharmacological classes currently available. Their potential impact will depend on addressing persistent challenges related to cost, reimbursement policy, equitable access, and ongoing supply constraints.

Prioritising people living with serious mental illness within fair allocation frameworks could help reduce excess and premature mortality in this vulnerable population in the near term, while longer-term evidence continues to emerge.