Drug-Induced Obesity Quiz
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Gained weight
Unexplained weight gain
Inability to sleep
Lack of motivation
Consuming excessive calories
Rashes
Facial roundness
Not seeing your symptoms? No worries!
What is Drug-Induced Obesity?
Drug-induced weight gain is a side effect of many commonly used drugs, such as long-term steroid medication. This often leads to obesity-related health problems. Due to the weight gain, some patients discontinue the medication.
Typical Symptoms of Drug-Induced Obesity
- Taking steroids
- Unintentional weight gain of more than 4.4lbs/2kg in a month
- Taking psychiatric medications or sleeping pills
- Decreased motivation
- Facial swelling
- Taking medication for seizures or epilepsy
- History of connective tissue, autoimmune or rheumatic disease
- Taking insulin or other diabetic drugs
Diagnostic Questions for Drug-Induced Obesity
Your doctor may ask these questions to check for this disease:
- Are you currently taking steroids?
- Have you gained more than 4.4lbs/2kg in one month without trying?
- Are you taking any psychiatric medications or sleeping pills?
- Have you been experiencing decreased motivation recently?
- Is your face swollen?
Treatment of Drug-Induced Obesity
Medication causing weight gain should not be discontinued without consulting the doctor. Management of weight gain includes dietary changes and exercise. Medications to manage drug-induced weight gain may be prescribed.
Reviewed By:
Unnati Patel, MD, MSc (Family Medicine)
Dr.Patel serves as Center Medical Director and a Primary Care Physician at Oak Street Health in Arizona. She graduated from the Zhejiang University School of Medicine prior to working in clinical research focused on preventive medicine at the University of Illinois and the University of Nevada. Dr. Patel earned her MSc in Global Health from Georgetown University, during which she worked with the WHO in Sierra Leone and Save the Children in Washington, D.C. She went on to complete her Family Medicine residency in Chicago at Norwegian American Hospital before completing a fellowship in Leadership in Value-based Care in conjunction with the Northwestern University Kellogg School of Management, where she earned her MBA. Dr. Patel’s interests include health tech and teaching medical students and she currently serves as Clinical Associate Professor at the University of Arizona School of Medicine.
Hidetaka Hamasaki, MD (Endocrinology)
Dr. Hamasaki graduated from the Hiroshima University School of Medicine and the Graduate School of Medicine, Jichi Medical University. He completed his residency at the Department of Diabetes, Endocrinology and Metabolism, National Center for Global Health and Medicine Hospital and the Department of Internal Medicine, Kohnodai Hospital, National Center for Global Health and Medicine. He has served in the National Center for Global Health and Medicine Hospital and Kohnodai Hospital and joined Hamasaki Clinic in April 2017. Dr. Hamasaki specializes in diabetes and treats a wide range of internal medicine and endocrine disorders.
Content updated on Dec 5, 2025
Following the Medical Content Editorial Policy
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- Experienced sudden weight gain without a clear reason
- Unintentional weight gain of more than 4.4lbs/2kg
- Feeling less ambitious nowadays
- Significant weight gain over the last month
- I gained more than 5% of my weight in one month
- Fewer creative urges nowadays
Symptoms Related to Drug-Induced Obesity
Diseases Related to Drug-Induced Obesity
FAQs
Q.
Zyprexa Side Effects? Why Your Body is Reacting & Medical Next Steps
A.
Zyprexa can cause weight gain, higher blood sugar and cholesterol, drowsiness, dry mouth or constipation, and less often movement symptoms, with rare emergencies like severe muscle stiffness with fever, allergic reactions, chest pain, or confusion from very high blood sugar. There are several factors to consider, including dose, genetics, age, and baseline metabolic risk; see below for what’s normal, what needs monitoring, and key red flags. Do not stop it suddenly; instead, contact your prescriber to review labs, adjust timing or dose, consider alternatives, and add supportive lifestyle steps, and seek urgent care for severe symptoms. Complete next steps, monitoring checklists, and special risks for older adults are outlined below.
References:
* Duggan, L., & Duggan, J. (2017). Olanzapine: a review of its use in the treatment of schizophrenia, bipolar I disorder, and depression. *CNS Drugs, 31*(9), 779-804. pubmed.ncbi.nlm.nih.gov/28836173/
* De Hert, M., Detraux, J., & van Winkel, R. (2012). Antipsychotic-induced metabolic syndrome: mechanisms, clinical implications, and management. *CNS Drugs, 26*(11), 949-972. pubmed.ncbi.nlm.nih.gov/22754716/
* Kroeze, Y., Correll, C. U., & de Haan, L. (2011). The metabolic side effects of olanzapine: a systematic review of the underlying mechanisms and potential solutions. *Pharmacology, Biochemistry and Behavior, 99*(2), 207-220. pubmed.ncbi.nlm.nih.gov/21855653/
* Mazza, L., Maellaro, N., Corponi, F., De Vecchis, L., Palumbo, F., Panaccione, I., ... & Sani, G. (2021). Pharmacological strategies for the treatment of olanzapine-induced weight gain. *Expert Opinion on Drug Safety, 20*(4), 389-405. pubmed.ncbi.nlm.nih.gov/33501744/
* Correll, C. U., Bobes, J., Kane, J. M., Tanaka, Y., & Schulze-Lentzen, D. (2008). Long-term safety of olanzapine in bipolar disorder: a meta-analysis and systematic review. *Journal of Clinical Psychiatry, 69*(9), 1321-1340. pubmed.ncbi.nlm.nih.gov/18767936/
Q.
Zyprexa Side Effects? Why Your Body Reacts & Medically Approved Next Steps
A.
Zyprexa side effects include weight gain, sedation, and metabolic changes like high blood sugar and cholesterol, plus possible movement or sexual effects, and rarely emergencies such as fever with rigidity, severe confusion, fainting, or seizures; these occur because it changes dopamine and serotonin pathways that also influence appetite, metabolism, sleep, and movement. Do not stop the medicine suddenly; see below for medically approved next steps, including a medication review, regular weight and lab monitoring, dose or timing adjustments, supportive lifestyle steps, discussing alternatives when needed, and exactly when to seek urgent care.
References:
* Schoretsanitis G, Gassenmaier L, Stegmayer K, Rössler W, Schimmelmann BG, Messer T. Adverse effects of olanzapine: A critical review. J Clin Psychopharmacol. 2017 Mar/Apr;37(2):203-211. PMID: 28248881.
* Zhu H, Li P, Hu G. Mechanisms of Olanzapine-Induced Metabolic Side Effects: New Insights and Potential Targets for Prevention. Front Endocrinol (Lausanne). 2021 Mar 1;12:656331. PMID: 33737968.
* Pinto-Figueroa DA, Sánchez-Algarra D, García-Marín LM, García-Domínguez JM, Gutiérrez-Rojas L. Olanzapine-induced weight gain: Mechanisms and therapeutic strategies. J Psychiatr Res. 2019 Jun;113:149-158. PMID: 31035048.
* Chintoh A, Mansur RB, Brietzke E, Soczynska JK, Goldstein BI, Blumberger DM, Miranda L, Kennedy SH, McIntyre RS. Extrapyramidal Side Effects of Second-Generation Antipsychotics: A Review of the Literature. J Clin Psychopharmacol. 2015 Oct;35(5):548-59. PMID: 26352936.
* Guo R, Zhang Y, Tan Y, Wu Y, Yang J, Cai D, Yang X, Shi R, Wang X, Zhang C, Cui K, Yu Y. Pharmacological strategies for managing olanzapine-induced weight gain and metabolic syndrome. Expert Opin Drug Saf. 2021 Mar;20(3):283-294. PMID: 33261546.
Q.
Weight Gain on Olanzapine? Why Your Body Reacts & Medically Approved Next Steps
A.
Weight gain with olanzapine is common because the medication can increase appetite, slow metabolism, and reduce insulin sensitivity, which may raise risks like metabolic syndrome. There are several factors to consider, and safe, medically approved steps include not stopping suddenly, working with your prescriber on dose or alternatives, considering metformin, starting early lifestyle changes, and getting regular lab checks. See below for important details that can shape the best next steps in your care.
References:
* Xu, H., Huang, R., Xu, Y., Zhu, T., Tang, R., Wang, X., ... & Shi, S. (2019). Mechanisms of Olanzapine-Induced Weight Gain and Metabolic Dysfunction. *Frontiers in Endocrinology*, *10*, 144. doi: 10.3389/fendo.2019.00144
* Hasnain, M., Vieweg, W. V., & Hollett, S. B. (2021). Management of Antipsychotic-Induced Weight Gain: An Update. *Innovations in Clinical Neuroscience*, *18*(7-9), 17–23. PMCID: PMC8465355.
* Mossa, A. K., Shahzad, M. R., Aftab, M. T., Kasi, A., Rehman, Z. U., Khan, M. F., ... & Moin, K. (2021). Pharmacological strategies to manage antipsychotic-induced weight gain: a systematic review and meta-analysis. *International Clinical Psychopharmacology*, *36*(3), 115–124. doi: 10.1097/YIC.0000000000000350.
* Patel, R. A., & Rihani, R. (2021). Olanzapine: a review of safety and tolerability in the treatment of schizophrenia. *Therapeutic Advances in Psychopharmacology*, *11*, 20451253211048680. doi: 10.1177/20451253211048680.
* Mamo, D. C., & Mamo, M. M. (2022). Clinical guidelines for the prevention and treatment of antipsychotic-induced weight gain: an update. *Journal of Clinical Psychopharmacology*, *42*(4), 305–311. doi: 10.1097/JCP.0000000000001550.
Q.
Mirtazapine for Women 30-45: Side Effects, Weight & Next Steps
A.
For women 30-45, mirtazapine can help with depression, insomnia, anxiety, and appetite loss, but it commonly causes increased appetite, weight gain, and sedation; rarer risks include mood changes, low white blood cells, and mania. About 10-20% experience significant weight gain, often beginning in the first weeks. There are several factors to consider for next steps, including early weight monitoring, nutrition and activity strategies, dose or timing adjustments, pregnancy and sexual side effect considerations, and when to call a doctor. See the complete guidance below to decide what to do next.
References:
* Liang S, Song Y, Hou J, Liu X, Zhao J, Tang B, Guo J, Lin S. Weight gain and cardiometabolic risk with mirtazapine: a systematic review and meta-analysis. Transl Psychiatry. 2022 Mar 1;12(1):89. doi: 10.1038/s41398-022-01850-y. PMID: 35232924; PMCID: PMC8890253.
* Arroll MA, Arroll B. Mirtazapine and weight gain: A systematic review and meta-analysis of clinical studies. J Psychopharmacol. 2020 Oct;34(10):1083-1089. doi: 10.1177/0269881120938833. Epub 2020 Jul 14. PMID: 32660249.
* De Berardis D, Fornaro M, Serroni N, Campanella D, De Lauretis I, D'Andrea G, Perna G, Iasevoli F, Indaco C, De Bartolomeis A, Salerno RM. Mirtazapine for depression: an updated review of its efficacy, safety and tolerability. Expert Opin Pharmacother. 2013 Nov;14(16):2273-92. doi: 10.1517/14656566.2013.840749. Epub 2013 Oct 7. PMID: 24099496.
* Ferguson JM. Management of antidepressant-induced side effects. J Clin Psychiatry. 2014;75 Suppl 1:20-30. doi: 10.4088/JCP.13063su1. PMID: 24709299.
* Montejo AL, Montejo L, Navarro-Cremades F. Update on the pharmacological management of antidepressant-induced sexual dysfunction, weight gain, and somnolence. Expert Opin Pharmacother. 2014 Jun;15(9):1227-43. doi: 10.1517/14656566.2014.908092. Epub 2014 Apr 10. PMID: 24716913.
Q.
Do steroids cause weight gain?
A.
Yes, taking steroids can cause weight gain. See below to understand more.
References:
Fardet L, Nazareth I, & Petersen I. (2021). Long-term systemic glucocorticoid therapy and weight gain. Rheumatology (Oxford, England), 32864693.
https://pubmed.ncbi.nlm.nih.gov/32864693/
Merritt RJ, Hack SL, Kalsch M, & Olson D. (1986). Corticosteroid therapy-induced obesity in children. Clinical pediatrics, 3948457.
https://pubmed.ncbi.nlm.nih.gov/3948457/
Uddén J, Björntorp P, Arner P, Barkeling B, Meurling L, & Rössner S. (2003). Effects of glucocorticoids on leptin levels and eating .... Journal of internal medicine, 12542564.
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Ness-Abramof R, Apovian CM. Drug-induced weight gain. Drugs Today (Barc). 2005 Aug;41(8):547-55. doi: 10.1358/dot.2005.41.8.893630. PMID: 16234878.
https://pubmed.ncbi.nlm.nih.gov/16234878/Singh S, Ricardo-Silgado ML, Bielinski SJ, Acosta A. Pharmacogenomics of Medication-Induced Weight Gain and Antiobesity Medications. Obesity (Silver Spring). 2021 Feb;29(2):265-273. doi: 10.1002/oby.23068. PMID: 33491309; PMCID: PMC8215694.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8215694/