Operation Resiliency | Clinical Commentary August 2026
Written by Michael Murphy, MSN, PMHNP-S
If you’re taking an antidepressant or antipsychotic medication and have gained weight, you’re not alone.
Weight gain is one of the most common and frustrating side effects of many psychiatric medications. For some people, it affects confidence and physical health. For others, it becomes a reason to stop taking medications that are otherwise helping them manage depression, anxiety, bipolar disorder, or schizophrenia.
The good news is that recent research suggests GLP-1 medications such as semaglutide and tirzepatide may help many patients lose weight without compromising their psychiatric treatment. While scientists are still learning about long-term outcomes, the current evidence is encouraging.
In this article I will answer:
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- Can you take Semaglutide with Antidepressants or Antipsychotics?
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- Why Do Antidepressants and Antipsychotics Cause Weight Gain?
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- How Can GLP-1 Medications Help?
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- What Does the Latest Research Show?
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- Do Antidepressants Affect How Well Semaglutide Works?
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- Can Semaglutide Affect Depression, Anxiety, or Other Mental Health Conditions?
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- Are There Medication Interactions to Consider?
Here’s what the latest research shows and what it could mean if you’re considering medical weight loss while taking psychiatric medications.
Can You Take Semaglutide with Antidepressants or Antipsychotics?
For many patients, yes. Current research suggests that GLP-1 medications can often be used safely alongside antidepressants and antipsychotics when prescribed and monitored by qualified healthcare providers.
Clinical studies have found that patients taking GLP-1 medications experienced meaningful weight loss without worsening psychiatric symptoms. However, treatment should always be individualized. Your medical history, current medications, mental health diagnosis, and overall health all play a role in determining whether semaglutide or another GLP-1 medication is appropriate for you.
The goal isn’t simply to lose weight it’s to improve your overall health while maintaining the stability you’ve worked hard to achieve.
Why Do Antidepressants and Antipsychotics Cause Weight Gain?
Many psychiatric medications affect the brain pathways involved in appetite, metabolism, and energy balance.
Certain antipsychotic medications particularly clozapine and olanzapine are strongly associated with rapid weight gain. Some antidepressants and mood stabilizers may also increase appetite or make it more difficult to maintain a healthy weight.
Over time, medication-induced weight gain can increase the risk of:
- Prediabetes
- Type 2 diabetes
- High blood pressure
- Heart disease
- Reduced quality of life
People living with serious mental illness already face higher rates of chronic medical conditions. Managing these metabolic side effects has become an important part of comprehensive psychiatric care not simply a cosmetic concern.
How Can GLP-1 Medications Help?
GLP-1 receptor agonists, including semaglutide, tirzepatide, and liraglutide, were originally developed to treat type 2 diabetes. Today, they are also widely prescribed for chronic weight management.
These medications work by:
- Reducing appetite
- Helping you feel full longer
- Slowing stomach emptying
- Improving blood sugar regulation
Rather than relying on willpower alone, GLP-1 medications help regulate the biological systems involved in hunger and metabolism. Because of this, researchers have become increasingly interested in whether they can help people experiencing weight gain caused by psychiatric medications.
What Does the Latest Research Show?
A randomized controlled trial published in Lancet Psychiatry followed patients with schizophrenia taking clozapine over 36 weeks. Researchers compared semaglutide with a placebo and found:
- Nearly a 14% average reduction in body weight among patients receiving semaglutide.
- Less than 0.5% weight loss in the placebo group.
- Approximately two-thirds of participants lost at least 10% of their starting body weight.
- No worsening of psychiatric symptoms based on PANSS scores, a standard measure of psychotic symptom severity.
A separate randomized trial published in the Journal of Affective Disorders studied liraglutide in patients taking clozapine or olanzapine. Researchers found similar improvements in weight and metabolic health without destabilizing psychiatric symptoms.
A systematic review and meta-analysis published in the Journal of the Endocrine Society reviewed multiple studies involving psychiatric patients and reached a similar conclusion: GLP-1 medications appear to be an effective option for reducing medication-induced weight gain while maintaining psychiatric stability for many individuals.
Although additional long-term research is still needed, the evidence continues to move in a positive direction.
Do Antidepressants Affect How Well Semaglutide Works?
One interesting finding from the systematic review is that weight loss appeared somewhat reduced in patients taking certain antidepressants, including:
- Citalopram
- Escitalopram
- Bupropion
This doesn’t mean semaglutide stops working.
Instead, it suggests that some psychiatric medications may influence how much weight a person loses while taking a GLP-1 medication. Researchers are continuing to study why this happens and whether the effect differs between medication classes.
For patients, the takeaway is simple: results may vary, and realistic expectations are important.
Can Semaglutide Affect Depression, Anxiety, or Other Mental Health Conditions?
This has become one of the most common questions surrounding GLP-1 medications.
In 2023, European regulators investigated reports suggesting a possible link between GLP-1 medications and suicidal thoughts or self-harm. Earlier observational research also raised concerns about a possible increase in depression and suicidal behavior among some patients taking liraglutide or semaglutide.
Those reports prompted understandable caution.
More recent research, however, has been reassuring.
A 2025 randomized analysis using the Columbia Suicide Severity Rating Scale found no meaningful difference in suicidal ideation between semaglutide and placebo groups.
A pooled 2026 analysis of tirzepatide clinical trials found suicidal ideation occurred in approximately 0.6% of both medication and placebo groups, indicating no measurable increase in risk.
Researchers also reviewed large healthcare databases in 2026 and found lower rates of new anxiety and depression diagnoses among patients taking semaglutide and tirzepatide compared with people using older weight-loss medications.
While no medication is completely without risk, the current evidence is generally cautiously reassuring. Ongoing research and regular follow-up remain important.
Are There Medication Interactions to Consider?
Yes but they’re generally manageable with proper medical supervision.
GLP-1 medications slow stomach emptying, which can delay the absorption of certain oral medications taken around the same time.
For people taking antidepressants, antipsychotics, or other psychiatric medications, this may affect medication timing rather than medication safety.
This is one reason it’s important for your healthcare providers to communicate with one another. Coordinated care helps ensure your psychiatric medications continue working effectively while your weight-loss treatment is optimized.
Never stop or adjust psychiatric medications without first speaking with the healthcare professional who prescribed them.
What I Tell My Patients
One of the most common concerns I hear is, “I finally found a medication that helps my mental health. I don’t want to lose that progress just to lose weight.”
That’s a valid concern.
For many patients, the goal isn’t choosing between mental health and physical health, it’s improving both.
Current research suggests that many individuals can safely use GLP-1 medications while continuing psychiatric treatment, provided the decision is made thoughtfully and with appropriate monitoring. Every patient is different, and the best treatment plan is one tailored to your medical history, medications, and long-term health goals.
Frequently Asked Questions
Can you take semaglutide with antidepressants?
Many patients can. Your healthcare provider will consider your medications, health history, and treatment goals before recommending whether semaglutide is appropriate.
Can people take antipsychotics lose weight with GLP-1 medications?
Current clinical trials suggest many patients taking antipsychotics experience meaningful weight loss while maintaining psychiatric stability under medical supervision.
Will Semaglutide interfere with my psychiatric medication?
GLP-1 medications may slow the absorption of some oral medications, but this is typically managed by coordinating medication timing and monitoring treatment response.
Should my psychiatrist know im starting semaglutide?
Yes. Your psychiatrist and the clinician managing your weight-loss treatment should both be aware of your medications to ensure coordinated, safe care.
Final Thoughts
Weight gain caused by psychiatric medications can be frustrating, discouraging, and harmful to long-term health. Fortunately, newer research suggests that GLP-1 medications may offer an effective option for many patients who want to manage their weight without sacrificing the psychiatric treatment that supports their mental well-being.
If you’re considering semaglutide or another GLP-1 medication, speak with a qualified healthcare provider who can evaluate your health history, current medications, and treatment goals. A personalized approach is the safest and most effective way to determine whether GLP-1 therapy is right for you.
Sources
This article references randomized controlled trials published in Lancet Psychiatry and the Journal of Affective Disorders (2025), a systematic review and meta-analysis in the Journal of the Endocrine Society (2025), a review in the Canadian Journal of Psychiatry (2026), pooled SURMOUNT psychiatric safety analyses (2026), and large healthcare database studies evaluating GLP-1 medications and psychiatric outcomes.
This article is intended for educational purposes only and does not replace personalized medical advice. If you are experiencing thoughts of self-harm or are in crisis, call or text 988 to reach the Suicide & Crisis Lifeline, available 24 hours a day.