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Published on: 9/15/2026
Anxiety, jitteriness, and restlessness are common when starting bupropion or increasing the dose, and for most people these effects peak within the first one to two weeks and ease within two to four weeks as the body adjusts. Some people notice lingering agitation for six weeks or longer, especially at higher doses or with immediate-release forms, and that pattern can signal a need for a dose change, a switch to XL, or a different medication. Timing, caffeine intake, sleep, and whether the anxiety is worsening rather than fading all matter, so there are several important factors to consider before deciding to wait it out. See below for the full timeline, warning signs that require prompt medical attention, and practical ways to reduce early side effects.
If you are unsure whether your symptoms reflect normal adjustment or something that needs attention sooner, a free, instant, online symptom check can help you organize what you are feeling, see possible explanations, and understand which next step makes sense, all in a few minutes and without leaving home.
Last reviewed for medical accuracy: 09/15/2026
How Long Does Bupropion-Related Anxiety Last Before It Settles Down?
Starting bupropion can be a relief for many people dealing with depression or quitting smoking. Yet for some, new or worsened anxiety can crop up in the first days or weeks. Understanding what to expect—and when it typically eases—can help you stick with treatment and feel more confident in managing side effects.
Bupropion is a prescription medication most often used to:
Unlike many antidepressants that focus on serotonin, bupropion works on dopamine and norepinephrine pathways. This different approach often means fewer sexual side effects or weight gain, but it can sometimes increase feelings of nervousness or anxiety—especially at the start.
Anxiety on bupropion may stem from:
Clinical trials and post-marketing reports suggest up to 10–20% of new bupropion users notice increased anxiety or restlessness early on.
While individual experiences vary, most people see anxiety peak and then fade as their body adjusts:
Note: A small number of people might experience ongoing anxiety. If it continues beyond six weeks or gets worse at any point, talk to your doctor.
While most bupropion-related anxiety settles within 4–6 weeks, you should reach out to a healthcare professional if you experience:
If you’re unsure whether what you’re feeling is typical or serious, consider a free, online symptom check, using the doctor approved Ubie Symptom Checker.
A frank conversation with your prescriber can help:
Always discuss any severe or alarming symptoms with a qualified professional. If you ever feel unsafe with your thoughts or behaviors, seek immediate medical attention.
Always remember: never stop or change your medication without talking to your doctor. If you experience any life-threatening or serious symptoms, seek emergency care right away.
(References)
* Adam MP, Bick S, Mirzaa GM, Wallace SE, Amemiya A, Caldeira Brás I, Dawson J, Kay C, Caron NS, Hayden MR. Huntington Disease. 1993. PMID: 20301482.
* Yatham LN, Kennedy SH, Parikh SV, Schaffer A, Bond DJ, Frey BN, Sharma V, Goldstein BI, Rej S, Beaulieu S, Alda M, MacQueen G, Milev RV, Ravindran A, O'Donovan C, McIntosh D, Lam RW, Vazquez G, Kapczinski F, McIntyre RS, Kozicky J, Kanba S, Lafer B, Suppes T, Calabrese JR, Vieta E, Malhi G, Post RM, Berk M. Canadian Network for Mood and Anxiety Treatments (CANMAT) and International Society for Bipolar Disorders (ISBD) 2018 guidelines for the management of patients with bipolar disorder. Bipolar Disord. 2018 Mar;20(2):97-170. doi: 10.1111/bdi.12609. Epub 2018 Mar 14. PMID: 29536616; PMCID: PMC5947163.
* Schwasinger-Schmidt TE, Macaluso M. Other Antidepressants. Handb Exp Pharmacol. 2019;250:325-355. doi: 10.1007/164_2018_167. PMID: 30194544.
* Sheffler ZM, Patel P, Abdijadid S. Antidepressants. 2026 Jan. PMID: 30844209.
* Naguy A, Badr BHM. Bupropion-myth-busting! CNS Spectr. 2022 Oct;27(5):545-546. doi: 10.1017/S1092852921000365. Epub 2021 Apr 12. PMID: 33843549.
* Alberter AA, Chambers AJ, Schaffer DH. Bupropion Toxicity. 2026 Jan. PMID: 35593803.
* DeBattista C, Schatzberg AF. The Black Book of Psychotropic Dosing and Monitoring. Psychopharmacol Bull. 2024 Jul 8;54(3):8-59. doi: 10.64719/pb.4493. PMID: 38993656; PMCID: PMC11235576.
* Olagunju AE, Ghoddusi F. Attention-Deficit/Hyperactivity Disorder in Adults. Am Fam Physician. 2024 Aug;110(2):157-166. PMID: 39172673.
* Manter MA, Birtwell KB, Bath J, Friedman NDB, Keary CJ, Neumeyer AM, Palumbo ML, Thom RP, Stonestreet E, Brooks H, Dakin K, Hooker JM, McDougle CJ. Pharmacological treatment in autism: a proposal for guidelines on common co-occurring psychiatric symptoms. BMC Med. 2025 Jan 7;23(1):11. doi: 10.1186/s12916-024-03814-0. Epub 2025 Jan 7. PMID: 39773705; PMCID: PMC11705908.
* Oldak SE, Maristany AJ. Bupropion and Anxiety: A Brief Review. Hum Psychopharmacol. 2025 Sep;40(5):e70018. doi: 10.1002/hup.70018. PMID: 40958494.
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