Wellbutrin: Uses, dosage, side effects, warnings & patient reviews

What is Wellbutrin (Bupropion)?

Wellbutrin is an oral antidepressant medication containing the active ingredient bupropion hydrochloride. It belongs to a distinct pharmacological class known as aminoketones and functions as a norepinephrine-dopamine reuptake inhibitor (NDRI).

Unlike many common antidepressants such as selective serotonin reuptake inhibitors (SSRIs), Wellbutrin’s primary mechanism involves inhibiting the reuptake of the neurotransmitters norepinephrine and dopamine in the brain, with minimal direct effect on serotonin. This unique profile is associated with a different side effect spectrum. For information on other depression treatments, see the antidepressant drug category.

Bupropion is also marketed under the brand name Zyban for a separate FDA-approved indication: aid to smoking cessation treatment. For related resources on quitting smoking, see our article on getting help to quit smoking.

How to Take Wellbutrin

Administration of Wellbutrin must follow a healthcare provider’s precise instructions to ensure safety and efficacy, particularly to mitigate the risk of seizures.

Administration Guidelines

Swallow tablets whole. Do not crush, split, or chew extended-release (XL) or sustained-release (SR) tablets, as this can damage the controlled-release mechanism and lead to a rapid, potentially dangerous increase in drug release.

The medication is typically taken once daily (XL formulation) or twice daily (SR formulation). Dosing schedules are strictly determined by the prescribing physician based on the formulation and individual patient factors.

Dosage Initiation and Adherence

Treatment is usually initiated at a lower dose to assess tolerance. The dosage may be gradually increased by the prescribing physician after several days, not exceeding the maximum recommended daily dose.

It is critical to take this medication exactly as prescribed. Do not stop taking Wellbutrin abruptly without consulting your doctor, as this may cause withdrawal symptoms or a return of depression. If a dose is missed, take it as soon as remembered unless it is close to the time for the next dose. Do not double the dose to catch up.

Side Effects of Wellbutrin

Bupropion treatment can cause adverse reactions ranging from common and mild to serious and life-threatening. The incidence of side effects is often dose-related.

What is Wellbutrin Used For?

Wellbutrin is approved by the U.S. Food and Drug Administration (FDA) for specific psychiatric conditions. Its use is restricted to prescription under medical supervision.

FDA-Approved Uses

• Major Depressive Disorder (MDD): For the acute and maintenance treatment of major depressive disorder in adults.
• Seasonal Affective Disorder (SAD): For the prevention of depressive episodes in adults with a diagnosis of major depressive disorder with a seasonal pattern.
• Smoking Cessation (as Zyban): Bupropion, under the brand Zyban, is indicated as an aid to smoking cessation treatment in adults. For related resources, visit the quit-smoking drug category.

Off-Label Uses

Healthcare providers may sometimes prescribe Wellbutrin for conditions not explicitly approved by the FDA, based on clinical evidence and judgment. Such off-label uses include:

• Attention-Deficit/Hyperactivity Disorder (ADHD) in adults.
• Management of sexual dysfunction induced by other antidepressant medications (e.g., SSRIs). For a detailed discussion, see this guide to antidepressants and sexual dysfunction.

Important Safety Concerns and Contraindications

Wellbutrin carries specific, serious risks that necessitate careful patient screening and monitoring by a healthcare professional.

Boxed Warning: Suicidality

Antidepressants, including Wellbutrin, have a Boxed Warning about an increased risk of suicidal thinking and behavior in children, adolescents, and young adults (ages 18-24) during initial treatment. All patients starting therapy should be closely monitored for clinical worsening, suicidality, or unusual changes in behavior.

Seizure Risk

Bupropion causes a dose-related risk of seizures. The risk is approximately 0.1% at doses up to 300 mg/day but increases significantly at 450 mg/day. It is contraindicated in patients with:

• A seizure disorder.
• Current or prior diagnosis of bulimia or anorexia nervosa.
• Undergoing abrupt discontinuation of alcohol, benzodiazepines, barbiturates, or antiepileptic drugs.

The seizure risk is also increased with concomitant use of other medications that lower the seizure threshold, including certain opioids.

Neuropsychiatric Reactions

Patients treated with bupropion have experienced a variety of neuropsychiatric symptoms, including delusions, hallucinations, psychosis, paranoia, and confusion. These reactions may necessitate discontinuation of treatment.

Elevated Blood Pressure

Treatment can elevate blood pressure, sometimes significantly. Blood pressure should be monitored regularly, especially in patients with pre-existing hypertension.

Critical Warnings for Wellbutrin Use

Contraindications

Wellbutrin is contraindicated in patients with:

• Seizure disorder or conditions predisposing to seizures.
• Current or prior diagnosis of bulimia or anorexia nervosa.
• Concurrent use of, or recent discontinuation (within 14 days) of, a Monoamine Oxidase Inhibitor (MAOI).
• Known hypersensitivity to bupropion or any ingredient in the formulation.

Activation of Mania/Hypomania

Antidepressant treatment can precipitate a manic or hypomanic episode in patients with bipolar disorder. Bupropion is not approved for treating bipolar depression. Patients should be screened for bipolar disorder prior to initiation, as treating a depressive episode without a concomitant mood stabilizer may induce such a switch.

Angle-Closure Glaucoma

Bupropion can cause pupillary dilation, which may trigger an angle-closure attack in patients with anatomically narrow angles who do not have a patent iridectomy.

Hepatotoxicity

Cases of liver injury, ranging from asymptomatic transaminase elevations to severe hepatitis, have been reported. Liver function tests should be considered in patients presenting with symptoms suggestive of hepatic dysfunction.

Wellbutrin Dosage Information

Dosing is highly individualized and must be determined by a healthcare provider. The following table outlines standard dosage ranges for the different formulations; the maximum single dose must never be exceeded.

Important Dosing Rules

• Dose Escalation: Do not initiate therapy at the target dose. A gradual dose escalation over several days is required to minimize the risk of seizures.
• Maximum Single Dose: The single dose must never exceed 200 mg for SR or 450 mg for XL formulations. The total daily dose must not exceed 450 mg.
• Dosing Interval (SR): Doses of the SR formulation must be administered at least 8 hours apart.

Drug Interactions with Wellbutrin

Bupropion undergoes complex metabolism and affects the metabolism of other drugs, leading to numerous clinically significant interactions.

Additional Information

Storage and Handling

Store Wellbutrin tablets at room temperature, between 20°C to 25°C (68°F to 77°F). Keep the medication in its original container, tightly closed, and away from excess moisture and light. Keep all medications out of the reach of children and pets.

Overdose

Overdose of bupropion is a medical emergency characterized by symptoms including seizures, hallucinations, loss of consciousness, tachycardia, and cardiac conduction disturbances. In case of suspected overdose, contact a poison control center or emergency medical services immediately.

Discontinuation

Wellbutrin should not be stopped abruptly without medical advice. While not typically associated with a severe physical withdrawal syndrome like some other antidepressants, abrupt discontinuation can lead to symptoms such as irritability, agitation, anxiety, insomnia, and a return of depressive symptoms. A healthcare provider will advise on a appropriate tapering schedule if discontinuation is necessary.

References and Medical Sources

This information is based on the official prescribing information and authoritative clinical resources.

1. U.S. Food and Drug Administration (FDA). Wellbutrin (bupropion hydrochloride) Prescribing Information. [Revised 2022]. https://www.accessdata.fda.gov/drugsatfda_docs/label/2009/018644s039s040.pdf
2. MedlinePlus. Bupropion. U.S. National Library of Medicine; [Updated 2022]. https://medlineplus.gov/druginfo/meds/a695033.html
3. Drugs.com. Bupropion Professional Monograph. Drugs.com; [Updated 2024]. https://www.drugs.com/monograph/bupropion.html
4. American Psychiatric Association. Practice Guideline for the Treatment of Patients with Major Depressive Disorder. Third Edition. 2010.

Disclaimer: The information on this site is provided for informational purposes only and is not medical advice. It does not replace professional medical consultation, diagnosis, or treatment. Do not self-medicate based on the information presented on this site. Always consult with a doctor or other qualified healthcare professional before making any decisions about your health.