Loading...
Loading...
Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Brand Name
Bupropion Hydrochloride (sr)
Generic Name
Bupropion Hydrochloride
Active Ingredient
BupropionCategory
Other
Salt Form
Hydrochloride
Variants
5
Different strengths and dosage forms
| Strength | Form | Route | NDC |
|---|---|---|---|
| 150 mg/1 | TABLET, EXTENDED RELEASE | ORAL | 50090-5101 |
| 200 mg/1 | TABLET, EXTENDED RELEASE | ORAL | 69097-879 |
| 100 mg/1 | TABLET, EXTENDED RELEASE | ORAL |
References used for this content
This page is for informational purposes only and does not replace medical advice. Before using any prescription or over-the-counter medication for Bupropion Hydrochloride (sr), you must consult a qualified healthcare professional.
| 150 mg/1 | TABLET, EXTENDED RELEASE | ORAL | 69097-878 |
| 150 mg/1 | TABLET, EXTENDED RELEASE | ORAL | 43598-863 |
Detailed information about Bupropion Hydrochloride (sr)
Bupropion is an atypical antidepressant belonging to the aminoketone class, primarily used to treat major depressive disorder, seasonal affective disorder, and as an aid for smoking cessation. It functions as a norepinephrine-dopamine reuptake inhibitor (NDRI).
Dosage for Bupropion must be highly individualized and is typically started at a low dose to minimize side effects, particularly the risk of seizures.
Bupropion is not currently FDA-approved for use in pediatric patients (children and adolescents under 18 years of age) for the treatment of depression or smoking cessation. Clinical trials have raised concerns regarding the increased risk of suicidal thoughts and behaviors in children and young adults taking antidepressants. If a healthcare provider prescribes Bupropion off-label for a minor (e.g., for ADHD), the patient must be monitored extremely closely for any psychiatric changes.
Because Bupropion and its active metabolites are primarily cleared by the kidneys, patients with impaired kidney function are at a higher risk of drug accumulation. Healthcare providers typically prescribe a reduced frequency or lower dose (e.g., 150 mg every other day) for patients with moderate to severe renal impairment.
In patients with severe hepatic cirrhosis, the dose should not exceed 150 mg every other day. For those with mild to moderate liver impairment, a reduction in dosage or frequency is also usually necessary to prevent toxicity.
Older adults may be more sensitive to the effects of Bupropion and are more likely to have age-related decreases in renal function. Clinical guidelines suggest starting at the lower end of the dosing range and monitoring closely for adverse effects, particularly agitation and insomnia.
To ensure the safety and efficacy of Bupropion, follow these specific instructions:
If you miss a dose, skip the missed dose and take your next dose at the regularly scheduled time. Do not take two doses at once to make up for a missed one, as this increases the risk of a seizure. If you are unsure what to do, contact your pharmacist or doctor.
An overdose of Bupropion is a medical emergency. Symptoms may include seizures, hallucinations, loss of consciousness, rapid heartbeat (tachycardia), and cardiac arrest. If an overdose is suspected, call 911 or seek immediate emergency medical attention. Early intervention is critical to managing potential neurological and cardiovascular complications.
> Important: Follow your healthcare provider's dosing instructions exactly. Do not adjust your dose or stop taking the medication without medical guidance, as sudden discontinuation can lead to withdrawal symptoms or a return of your condition.
Many patients starting Bupropion experience mild side effects as their body adjusts to the medication. These often diminish within the first few weeks of treatment. Common symptoms include:
Bupropion is a potent medication that requires careful medical supervision. Before starting treatment, it is vital to disclose your full medical history to your healthcare provider, particularly any history of head injury, brain tumors, or metabolic disorders, as these can increase the risk of seizures. Because Bupropion has stimulating properties, it may not be suitable for individuals with severe anxiety or those prone to panic attacks unless managed carefully by a specialist.
As noted in the side effects section, the primary Black Box Warning for Bupropion concerns the increased risk of suicidal ideation and behavior in children, adolescents, and young adults. While this risk is statistically lower in older adults, monitoring is required for all patients. Healthcare providers must weigh the risk of suicidality against the clinical need for the drug, especially since depression itself is a major risk factor for suicide.
Certain drug combinations with Bupropion are extremely dangerous and must be avoided:
There are several conditions where the use of Bupropion is strictly prohibited because the risks clearly outweigh any potential benefits:
Bupropion is classified as Pregnancy Category C (under the older FDA system). Data from pregnancy registries and epidemiological studies have not shown a clear, consistent increase in the risk of major birth defects or miscarriage. However, some studies have suggested a possible small increase in the risk of cardiovascular malformations (specifically left ventricular outflow tract obstructions) following first-trimester exposure.
Because untreated depression during pregnancy also carries significant risks for both the mother and the baby (including preterm birth and low birth weight), the decision to use Bupropion must be made on an individual basis. Healthcare providers will weigh the severity of the mother's condition against the potential risks to the fetus. If you become pregnant while taking Bupropion, do not stop the medication without consulting your doctor.
Bupropion and its active metabolites are excreted into human breast milk. While the amounts transferred are generally low (estimated at less than 2% of the weight-adjusted maternal dose), there have been rare case reports of seizures in nursing infants exposed to Bupropion. Mothers who choose to breastfeed while taking this medication should monitor their infants for unusual agitation, poor feeding, or changes in sleep patterns. A risk-benefit discussion with a pediatrician and a psychiatrist is essential.
Bupropion's pharmacological profile is distinct from most other antidepressants. It is a dual Norepinephrine-Dopamine Reuptake Inhibitor (NDRI). It binds to the norepinephrine transporter (NET) and the dopamine transporter (DAT) on the presynaptic neuron. By inhibiting these transporters, it prevents the reabsorption of these catecholamines, thereby increasing their availability in the synapse.
Additionally, Bupropion and its primary metabolite, hydroxybupropion, act as non-competitive antagonists at چندین (several) nicotinic acetylcholine receptors, specifically the α3β4 and α4β2 subtypes. This antagonism is thought to contribute to its effectiveness in treating nicotine addiction by reducing the 'hit' or reward associated with nicotine consumption and alleviating withdrawal symptoms.
The antidepressant effects of Bupropion typically take 2 to 4 weeks to become apparent, while the full therapeutic benefit may take up to 8 weeks. This delay suggests that the clinical effect is not just due to immediate reuptake inhibition but also involves downstream changes in gene expression and neuronal plasticity. Unlike SSRIs, Bupropion does not inhibit monoamine oxidase and has negligible affinity for serotonergic, histaminergic, or alpha-adrenergic receptors, which explains its lack of sedation and sexual side effects.
Common questions about Bupropion Hydrochloride (sr)
Bupropion is primarily used to treat major depressive disorder (MDD) and seasonal affective disorder (SAD). It is also FDA-approved as a smoking cessation aid under the brand name Zyban. Because it targets dopamine and norepinephrine, it is often prescribed for patients who experience low energy or those who want to avoid sexual side effects common with other antidepressants. Some doctors also use it off-label for ADHD or weight management. Always use this medication only for the condition specifically prescribed by your healthcare provider.
The most frequently reported side effects include dry mouth, insomnia, headache, and nausea. Many patients also experience a mild increase in anxiety or a 'jittery' feeling during the first few weeks of treatment. Unlike many other antidepressants, Bupropion is less likely to cause weight gain or sexual dysfunction. Most of these side effects are mild and tend to improve as your body adjusts to the medication. If side effects persist or become bothersome, you should contact your doctor to discuss a possible dose adjustment.
It is strongly advised to avoid or significantly limit alcohol consumption while taking Bupropion. Alcohol can increase the risk of seizures, which is the most serious potential side effect of this medication. Additionally, combining the two can lead to increased neuropsychiatric side effects, such as confusion or agitation. For those who are heavy drinkers, suddenly stopping alcohol while starting Bupropion can also trigger seizures. Discuss your alcohol intake honestly with your doctor before beginning treatment.
Bupropion is generally used during pregnancy only if the potential benefit justifies the potential risk to the fetus. While it is not definitively linked to major birth defects, some research has suggested a possible small increase in heart-related issues. Untreated depression also poses risks to both mother and baby, so the decision is complex. There is a pregnancy registry available to monitor the outcomes of women exposed to antidepressants. You should have a detailed discussion with your obstetrician and psychiatrist regarding the safest plan for your pregnancy.
While some patients may notice a slight improvement in energy within the first week, it typically takes 2 to 4 weeks to feel a significant improvement in mood. The full therapeutic effect of the medication often requires 6 to 8 weeks of consistent use. It is important to continue taking the medication as prescribed, even if you do not feel better immediately. If you have not noticed any improvement after 4 weeks, your healthcare provider may consider adjusting your dose. Never stop the medication early without professional guidance.
No, you should not stop taking Bupropion suddenly unless specifically directed by your doctor. Abruptly stopping an antidepressant can lead to discontinuation symptoms, which may include irritability, anxiety, or a return of depressive symptoms. While Bupropion is less likely than SSRIs to cause severe withdrawal, a gradual taper is always the safest approach. Your doctor will provide a schedule to slowly lower your dose over several days or weeks. This helps your brain chemistry adjust safely to the change.
If you miss a dose of Bupropion, you should skip the missed dose and take your next dose at the regular time. Never take a double dose to make up for the one you missed, as this significantly increases your risk of having a seizure. Because the medication has a long half-life, skipping one dose is unlikely to cause immediate withdrawal symptoms. If you frequently miss doses, consider using a pill organizer or setting a daily alarm. Contact your pharmacist if you have specific concerns about your dosing schedule.
Unlike many other antidepressants, Bupropion is generally considered 'weight-neutral' or may even cause modest weight loss in some patients. In clinical trials, more patients lost weight on Bupropion than on a placebo. This makes it a common choice for patients who are concerned about the weight gain often associated with SSRIs or tricyclic antidepressants. However, weight changes can vary significantly between individuals. If you experience significant or unexpected weight changes, you should discuss them with your healthcare provider.
Bupropion can interact with many other drugs, so it is vital to provide your doctor with a full list of your current medications. It should never be taken with MAOIs or other products containing Bupropion. It can also increase the levels of certain heart medications and other antidepressants in your blood. Caution is needed when taking it with drugs that lower the seizure threshold, such as steroids or certain antibiotics. Your pharmacist can check for specific drug-drug interactions before you start a new prescription.
Yes, Bupropion is available as a generic medication in all three of its major formulations: immediate-release, sustained-release (SR), and extended-release (XL). Generic versions are typically much more affordable than brand-name versions like Wellbutrin or Zyban. The FDA requires generic drugs to have the same active ingredient, strength, and dosage form as the brand-name product. Most insurance plans cover the generic version of Bupropion. If you have concerns about switching between brand and generic, talk to your pharmacist.
Other drugs with the same active ingredient (Bupropion)
> Warning: Stop taking Bupropion and call your doctor immediately if you experience any of these serious symptoms:
With prolonged use, most patients tolerate Bupropion well. However, long-term monitoring of blood pressure is recommended, as some patients may develop chronic hypertension. There is no evidence that Bupropion causes long-term organ damage (such as liver or kidney failure) in healthy individuals, but regular check-ups with a healthcare provider are necessary to ensure the medication remains safe and effective for the individual.
Bupropion carries an FDA Black Box Warning regarding Suicidality and Antidepressant Drugs.
Summary of Warning: Antidepressants increased the risk of suicidal thoughts and behavior in children, adolescents, and young adults (up to age 24) in short-term studies. These studies did not show an increase in the risk of suicidality with antidepressants compared to placebo in adults beyond age 24. Patients of all ages who are started on antidepressant therapy should be monitored closely for clinical worsening, suicidality, or unusual changes in behavior. Families and caregivers should be advised of the need for close observation and communication with the prescriber.
Report any unusual symptoms or changes in mood to your healthcare provider immediately. Your safety is the priority during treatment.
While taking Bupropion, your doctor may require the following:
Bupropion may cause dizziness, shakiness, or blurred vision, which can impair your ability to drive or operate heavy machinery safely. Do not engage in these activities until you know how the medication affects you. If you experience significant dizziness or a 'spaced-out' feeling, consult your doctor.
It is strongly recommended to minimize or avoid alcohol consumption while taking Bupropion. Alcohol can increase the risk of seizures and may worsen the neuropsychiatric side effects of the medication. Furthermore, if you are a heavy drinker and suddenly stop drinking while starting Bupropion, the risk of seizures increases dramatically due to alcohol withdrawal effects combined with the drug's mechanism.
Do not stop taking Bupropion abruptly. Although it is not considered addictive, sudden discontinuation can lead to a 'discontinuation syndrome' or a rapid return of depressive symptoms. Your healthcare provider will provide a tapering schedule to slowly reduce the dose, allowing your brain chemistry to stabilize.
> Important: Discuss all your medical conditions and lifestyle habits with your healthcare provider before starting Bupropion to ensure it is the safest option for you.
For each interaction, the clinical consequence is usually an increased risk of side effects or a change in the efficacy of one or both drugs. Management strategies typically involve dose adjustments or more frequent monitoring by your healthcare provider.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking to prevent dangerous interactions.
In these cases, a healthcare provider will perform a careful risk-benefit analysis before prescribing:
There is no known major cross-sensitivity between Bupropion and other classes of antidepressants like SSRIs or TCAs. However, if a patient has had a severe skin reaction or anaphylaxis to one formulation of Bupropion (e.g., the HCl salt), they should avoid other formulations (e.g., the hydrobromide salt) unless cleared by an allergist.
> Important: Your healthcare provider will evaluate your complete medical history, including past psychiatric diagnoses and physical health conditions, before prescribing Bupropion to ensure it is safe for you.
As previously noted, Bupropion is not FDA-approved for use in patients under 18. The primary concern is the Black Box Warning regarding increased suicidality in this age group. If used off-label for conditions like ADHD, the child must be monitored by a specialist for any signs of behavioral changes, hostility, or suicidal thoughts. No long-term data exists on the effects of Bupropion on growth and development in children.
In clinical trials, older adults did not respond differently to Bupropion than younger adults. However, the elderly are more likely to have decreased renal function, which can lead to the accumulation of toxic metabolites. There is also a higher risk of 'anticholinergic-like' side effects such as confusion and dizziness, which can increase the risk of falls. Starting with a lower dose (e.g., 150 mg XL once daily) is the standard of care for geriatric patients.
For patients with a Glomerular Filtration Rate (GFR) below 60 mL/min, Bupropion should be used with caution. The kidneys are responsible for eliminating the majority of the drug's active metabolites. In cases of moderate to severe renal impairment, the frequency of dosing is often reduced (e.g., to every other day) to prevent the metabolites from reaching levels that could trigger seizures or other toxicities.
Because the liver is the primary site of Bupropion metabolism, patients with liver disease require careful management. For those with severe hepatic impairment (Child-Pugh Class C), the dose is typically capped at 150 mg every other day. For mild to moderate impairment, doctors may still opt for a reduced dose or increased monitoring of plasma levels where available.
> Important: Special populations require individualized medical assessment. Always inform your doctor if you are pregnant, planning to become pregnant, or have any organ-related health issues.
| Parameter | Value |
|---|---|
| Bioavailability | 5% - 20% (Extensive first-pass) |
| Protein Binding | 84% |
| Half-life (Parent) | ~21 hours |
| Half-life (Hydroxybupropion) | ~20 - 37 hours |
| Tmax (XL formulation) | ~5 hours |
| Metabolism | Primarily Hepatic (CYP2B6) |
| Excretion | Renal 87%, Fecal 10% |
Bupropion Hydrochloride has the molecular formula C13H18ClNO·HCl and a molecular weight of 276.2 g/mol. It is a white crystalline powder that is highly soluble in water. Chemically, it is an aminoketone, structurally related to phenethylamines like cathinone (a natural stimulant) and diethylpropion (an anorectic). This structural similarity explains its mildly stimulating properties.
Bupropion is the only drug in the aminoketone class currently used as an antidepressant in the United States. While it is sometimes grouped with other 'atypical' antidepressants like mirtazapine or trazodone, its mechanism of action as an NDRI is unique among them. It is frequently used as an augmenting agent alongside SSRIs for patients who have a partial response to initial therapy.