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Does Duloxetine (Cymbalta) Cause Weight Gain? What the Research Says
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Mental Health
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Duloxetine vs Other Antidepressants for Weight Gain
Some antidepressants very clearly cause weight gain. The antidepressant mirtazapine (Remeron) is associated with increases in weight and body fat, and has even been shown to increase appetite specifically for sweets. It can be used to promote weight gain in patients who are not eating enough to maintain a healthy weight due to depression, cancer, or other factors. (8)
In contrast, other antidepressants can actually be used as part of a treatment regimen for weight management. Bupropion is an antidepressant that is used in combination with naltrexone for weight loss. The combination pill is called Contrave. When used for depression, bupropion is called Wellbutrin. One study showed 67% of patients taking bupropion lost over 5% of their body weight. When the patients with initial weight loss were followed for 6 months, they lost an average of 12.9% of their body weight, and nearly ¾ of what they lost was fat! (9)
Tips to Manage Weight Gain on Duloxetine
Exercise Regularly
Regular physical activity can be a helpful tool in managing duloxetine weight gain. The Department of Health and Human Services recommends moderate or vigorous aerobic activity on a regular basis. For moderate activity like brisk walking, target 150-300 minutes per week. For vigorous activity such as jogging, target 75-150 minutes per week. (10)
If you’re not able to hit those numbers at first, don’t worry! There are many strategies to build exercise into your daily routine. You can try doing squats while waiting for food to cook, parking at the far end of the parking lot, or getting off the bus one stop earlier. Making exercise a social activity can help establish a routine, and social connection can be beneficial for depression as well!
Follow a Balanced Diet
Emphasizing fruits and vegetables is a great starting point, since they are rich in vitamins and can help support good bowel habits by providing fiber. The World Health Organization recommends at least 400 grams (approximately 0.9 lbs) of fruits and vegetables per day. (11)
It can sometimes be tricky to know how many calories you’re eating. Strategies like meal-planning, weighing ingredients, and keeping healthy snack options around can help prevent consumption of unintentional calories.
Consider Weight Loss Medication
If you’re worried about duloxetine weight gain, you may be interested in exploring medication options like compounded semaglutide or other GLP-1s. Overall, GLP-1 medications are safe for depression and anxiety, with some studies even showing a benefit to mental health from GLP-1s. (12)
If you’ve noticed weight gain on duloxetine and want to explore your options, talk to your provider with Mochi.
FAQs
Does duloxetine weight gain go away?
Usually, yes. A balanced diet and regular exercise can help manage weight gain on duloxetine. In some cases, exploring a GLP-1 medication can also be a powerful tool.
Is duloxetine weight neutral?
Overall, duloxetine is associated with a moderate risk of small weight gain. However, each person responds differently to medication, and people can experience either Cymbalta weight loss or gain.
Are duloxetine appetite changes permanent?
No, duloxetine appetite changes usually go away after stopping the medication.
Do all antidepressants cause weight gain?
No, all antidepressants do not cause weight gain. Some, like bupropion, can promote weight loss.
When should I worry about duloxetine and weight?
Whenever you’re noticing persistent changes in your weight or appetite, it can help to talk to your healthcare provider. They can help build a plan that’s right for you to manage both weight and mental health.
Check Your Eligibility
If you’re wondering if you’re experiencing duloxetine weight gain, and what you should do, Mochi Health's telehealth platform can connect you with a provider to help with the next step in your journey! Check your eligibility here.
Disclaimer: This article is for educational purposes only and should not be considered medical advice. The information provided does not constitute recommendations for treatment. Always consult with your healthcare provider about your specific situation, symptoms, and treatment options.
References
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Petimar, J., Young, J. G., Yu, H., Rifas-Shiman, S. L., Daley, M. F., Heerman, W. J., Janicke, D. M., Jones, W. S., Lewis, K. H., Lin, P. D., Prentice, C., Merriman, J. W., Toh, S., & Block, J. P. (2024). Medication-Induced Weight Change Across Common Antidepressant Treatments : A Target Trial Emulation Study. Annals of internal medicine, 177(8), 993–1003. https://doi.org/10.7326/M23-2742
Uguz, F., Sahingoz, M., Gungor, B., Aksoy, F., & Askin, R. (2015). Weight gain and associated factors in patients using newer antidepressant drugs. General Hospital Psychiatry, 37(1), 46–48. https://doi.org/10.1016/j.genhosppsych.2014.10.011
Kao, A. C., & Müller, D. J. (2013). Genetics of antipsychotic-induced weight gain: Update and current perspectives. Pharmacogenomics, 14(16), 2067–2083. https://doi.org/10.2217/pgs.13.207
Riechelmann, R. P., Burman, D., Tannock, I. F., Rodin, G., & Zimmermann, C. (2009). Phase II trial of Mirtazapine for cancer-related cachexia and anorexia. American Journal of Hospice and Palliative Medicine, 27(2), 106–110. https://doi.org/10.1177/1049909109345685
Gadde, K. M., Parker, C. B., Maner, L. G., Wagner, H. R., 2nd, Logue, E. J., Drezner, M. K., & Krishnan, K. R. (2001). Bupropion for weight loss: an investigation of efficacy and tolerability in overweight and obese women. Obesity research, 9(9), 544–551. https://doi.org/10.1038/oby.2001.71
U.S. Department of Health and Human Services. (2018). Physical Activity Guidelines for Americans 2nd Edition. https://odphp.health.gov/sites/default/files/2019-09/Physical_Activity_Guidelines_2nd_edition.pdf
World Health Organization. (2026, January 26). Healthy diet. World Health Organization. https://www.who.int/news-room/fact-sheets/detail/healthy-diet
Kim, Y.-K., Kim, O. Y., & Song, J. (2020). Alleviation of depression by glucagon-like peptide 1 through the regulation of neuroinflammation, neurotransmitters, neurogenesis, and synaptic function. Frontiers in Pharmacology, 11. https://doi.org/10.3389/fphar.2020.01270
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