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Bupropion

N06A - Antidepressants ATC N06AX12 Small molecule approved 1985 Oral Natural product Black-box warning

JFDA label: Bupran SR

⚠ Black-Box Warning
  • Suicidality and antidepressant drugs:

Mechanism of Action

Aminoketone antidepressant structurally different from all other marketed antidepressants; like other antidepressants the mechanism of bupropion's activity is not fully understood. Bupropion is a relatively weak inhibitor of the neuronal uptake of norepinephrine and dopamine, and does not inhibit monoamine oxidase or the reuptake of serotonin. Metabolite inhibits the reuptake of norepinephrine. The primary mechanism of action is thought to be dopaminergic and/or noradrenergic.

Indications

Approved

  • Seasonal affective disorder (Aplenzin, Wellbutrin XL)
  • Smoking cessation (Zyban)

Off-label

  • Antidepressant-induced sexual dysfunction
  • Attention deficit hyperactivity disorder (adults)
  • Attention deficit hyperactivity disorder (children/adolescents)
  • Depression associated with bipolar disorder
  • Obesity

Contraindications

Source: Lexicomp

  • Additional contraindications (not in US labeling): Concurrent use or use within 14 days of thioridazine Absolute
  • Hypersensitivity to bupropion or any component of the formulation Absolute
  • concurrent use with other dosage forms of bupropion Absolute
  • history of anorexia/bulimia Absolute
  • initiation of bupropion in a patient receiving linezolid or intravenous methylene blue Aplenzin, Forfivo XL, Wellbutrin XL: Additional contraindications: Other conditions that increase seizure risk, including arteriovenous malformation, severe head injury, severe stroke, CNS tumor, CNS infection Forfivo XL: Additional contraindications: Patients receiving other dosage forms of bupropion Absolute
  • patients undergoing abrupt discontinuation of ethanol or sedatives, including benzodiazepines, barbiturates, or antiepileptic drugs Absolute
  • seizure disorder Absolute
  • use of MAO inhibitors (concurrently or within 14 days of discontinuing either bupropion or the MAO inhibitor) Absolute

Adverse Reactions

Very Common >10%Common 1–10%Uncommon 0.1–1% Rare 0.01–0.1%Very Rare <0.01%Not Known

Cardiac disorders (7)

Very Common Tachycardia

Common cardiac arrhythmia · chest pain · flushing · hypertension · hypotension · Palpitations

Nervous system disorders (24)

Very Common agitation · dizziness · headache · Insomnia

Common abnormal dreams · abnormality in thinking · akathisia · anxiety · central nervous system stimulation · confusion · depression · drowsiness · dystonia · hostility · irritability · Lack of concentration · memory impairment · migraine · nervousness · pain · paresthesia · sensory disturbance · sleep disorder · twitching

Renal and urinary disorders (5)

Common Polyuria · Urinary frequency · urinary tract infection · urinary urgency · vaginal hemorrhage

Immune system disorders (1)

Common Hypersensitivity reaction

Metabolism and nutrition disorders (5)

Very Common Weight loss

Common decreased libido · hot flash · menstrual disease · Weight gain

Gastrointestinal disorders (14)

Very Common constipation · nausea · nausea and vomiting · Xerostomia

Common Abdominal pain · anorexia · diarrhea · dysgeusia · dyspepsia · dysphagia · flatulence · increased appetite · oral mucosa ulcer · vomiting

Skin and subcutaneous tissue disorders (5)

Very Common Diaphoresis

Common pruritus · Skin rash · urticaria · xeroderma

Musculoskeletal and connective tissue disorders (7)

Very Common Tremor

Common arthralgia · arthritis · dyskinesia · Myalgia · neck pain · weakness

Eye disorders (1)

Very Common Blurred vision

Ear and labyrinth disorders (2)

Common auditory disturbance · Tinnitus

Infections and infestations (1)

Common Infection

General disorders and administration site conditions (2)

Common Accidental injury · fever

Respiratory, thoracic and mediastinal disorders (9)

Very Common Nasopharyngitis · pharyngitis · rhinitis

Common bronchitis · cough · epistaxis · increased cough · sinusitis · Upper respiratory infection

Other (1)

Not Known Ophthalmic: Diplopia

Dosing

Source: Lexicomp

Depression: Oral: Note: Treatment should be periodically evaluated at appropriate intervals to ensure lowest effective dose is used. Immediate release hydrochloride salt: Initial: 100 mg twice daily; after 3 days may increase to the usual dose of 100 mg 3 times a day; if no clinical improvement after several weeks, may increase to a maximum dose of 450 mg/day in 3 or 4 divided doses; do not exceed 150 mg in a single dose Sustained release hydrochloride salt: Initial: 150 mg daily in the morning; if tolerated, after 3 days, may increase to a target dose of 150 mg twice daily; if no clinical improvement after several weeks, may increase to a maximum dose of 200 mg twice daily; do not exceed 200 mg in a single dose Extended release: Hydrochloride salt (Wellbutrin XL): Initial: 150 mg once daily in the morning; if tolerated, as early as day 4, may increase to 300 mg once daily (maximum dose: 300 mg/day; however, guidelines suggest up to 450 mg/day may be used [APA 2010]). Hydrochloride salt (Forfivo XL): Switching from Wellbutrin immediate release, SR, or XL to Forfivo XL: Patients receiving 300 mg daily of bupropion hydrochloride for at least 2 weeks and requiring a dose increase or patients already taking 450 mg daily of bupropion hydrochloride may switch to Forfivo XL 450 mg once daily. Hydrobromide salt (Aplenzin): Initial: 174 mg once daily in the morning; may increase as early as day 4 of dosing to 348 mg once daily (target dose) Switching from hydrochloride salt formulation (eg, Bupropion immediate release, SR, XL, or Forfivo XL) to hydrobromide salt formulation (Aplenzin): Bupropion hydrochloride 150 mg daily is equivalent to bupropion hydrobromide 174 mg once daily Bupropion hydrochloride 300 mg daily is equivalent to bupropion hydrobromide 348 mg once daily Bupropion hydrochloride 450 mg daily is equivalent to bupropion hydrobromide 522 mg once daily Seasonal affective disorder (SAD): Initial: 150 mg once daily (Wellbutrin XL) or 174 mg once daily (Aplenzin) in the morning; if tolerated, may increase after 7 days to 300 mg once daily (Wellbutrin XL) or 348 mg once daily (Aplenzin) in the morning. Note: Prophylactic treatment should be reserved for those patients with frequent depressive episodes and/or significant impairment. Initiate treatment in the Autumn prior to symptom onset, and discontinue in early Spring with dose tapering. Doses >300 mg daily (Wellbutrin XL) or >348 mg daily (Aplenzin) have not been studied in SAD Smoking cessation (Zyban): Initial: 150 mg once daily for 3 days; increase to 150 mg twice daily (maximum dose: 300 mg/day). Note: Therapy should begin at least 1 week before target quit date. Target quit dates are generally in the second week of treatment. If patient successfully quits smoking after 7 to 12 weeks, may consider ongoing maintenance therapy based on individual patient risk:benefit. Efficacy of maintenance therapy (300 mg daily) has been demonstrated for up to 6 months. Conversely, if significant progress h
(For additional information see "Bupropion: Pediatric drug information") ADHD (off-label use): Children and Adolescents: Oral: Immediate release: Initial: 3 mg/kg/day in 2 to 3 divided doses; maximum initial dose 150 mg/day; increase dose as needed to a maximum daily dose of 6 mg/kg/day or 300 mg/day with no single dose > 150 mg. (AACAP [Pliszka 2007]) Sustained release and extended release: May use in place of immediate-release tablets, once the daily dose is increased using the immediate release product and the 12-hour dosage corresponds to a sustained-release tablet size or the 24-hour dosage corresponds to an extended release tablet size. MAO inhibitor recommendations: Refer to adult dosing.
Refer to adult dosing; use with caution. Discontinuation of therapy: Refer to adult dosing. MAO inhibitor recommendations: Refer to adult dosing.
Use with caution; manufacturer’s labeling suggests a reduction in dose and/or frequency be considered but does not provide specific dosing recommendations. Aplenzin, Wellbutrin, Wellbutrin SR, Wellbutrin XL, and Zyban product labeling defines renal impairment as GFR Forfivo XL: Use is not recommended.
Mild impairment (Child-Pugh score 5 to 6): Use with caution; manufacturer’s labeling suggests a reduction in dose and/or frequency be considered but does not provide specific dosing recommendations. Forfivo XL: Use is not recommended. Moderate to severe impairment, including severe hepatic cirrhosis (Child-Pugh score 7 to 15): Use with extreme caution; maximum dose: Aplenzin: 174 mg every other day Bupropion immediate release: 75 mg once daily Forfivo XL: Use is not recommended. Wellbutrin SR: 100 mg once daily or 150 mg every other day Wellbutrin XL, Zyban: 150 mg every other day

Warnings & Precautions

Source: Lexicomp

Suicidal thinking/behavior (use in treating psychiatric disorders)

Antidepressants increased the risk of suicidal thoughts and behavior in children, adolescents, and young adults in short-term trials. These trials did not show an increase in the risk of suicidal thoughts and behavior with antidepressant use in subjects aged 65 and older. In patients of all ages who are started on antidepressant therapy, monitor closely for worsening and for emergence of suicidal thoughts and behaviors, particularly during the initial 1 to 2 months of therapy or during periods of dosage adjustments (increases or decreases); advise families and caregivers of the need for close observation and communication with the prescriber. A medication guide concerning the use of antidepressants should be dispensed with each prescription.

CNS stimulation

May cause CNS stimulation (restlessness, anxiety, insomnia) or anorexia.

Cognitive impairment

May cause motor or cognitive impairment in some patients, which may impair physical or mental abilities; patients must be cautioned about performing tasks which require mental alertness (eg, operating machinery or driving).

Hypersensitivity reactions

Anaphylactoid/anaphylactic reactions have occurred, with symptoms of pruritus, urticaria, angioedema, and dyspnea. Serious reactions have been (rarely) reported, including erythema multiforme, Stevens-Johnson syndrome and anaphylactic shock. Arthralgia, myalgia, and fever with rash and other symptoms suggestive of delayed hypersensitivity resembling serum sickness have been reported.

Hypertension

May elevate blood pressure and cause hypertension. Events have been observed in patients with or without evidence of preexisting hypertension. The risk is increased when used concomitantly with monoamine oxidase inhibitors, nicotine replacement, or other drugs that increase dopaminergic or noradrenergic activity. Assess blood pressure before treatment and monitor periodically.

Mania/hypomania

May precipitate a manic, mixed, or hypomanic episode; risk is increased in patients with bipolar disorder or who have risk factors for bipolar disorder. Screen patients for a history of bipolar disorder and the presence of risk factors including a family history of bipolar disorder, suicide, or depression. Bupropion is not FDA approved for bipolar depression.

Neuropsychiatric effect (use in smoking cessation)

Serious neuropsychiatric events have occurred in patients taking bupropion for smoking cessation, including changes in mood (eg, depression, mania), psychosis, hallucinations, paranoia, delusions, homicidal ideation, hostility, agitation, aggression, anxiety, panic, suicidal ideation, suicide attempt, and completed suicide. The majority occurred during bupropion treatment; some occurred during treatment discontinuation. A causal relationship is uncertain as depressed mood may be a symptom of nicotine withdrawal. Some cases also occurred in patients taking bupropion who continued to smoke. Neuropsychiatric effects occurred in patients with and without preexisting psychiatric disease; some patients experienced a worsening of their psychiatric illnesses. However, subsequent controlled trials in patients with or without psychiatric disorders have not identified significant differences in neuropsychiatric effects for patients taking bupropion, varenicline, nicotine patches, or placebo (Anthenelli 2016; Cinciripini 2013). Observe all patients taking bupropion for neuropsychiatric reactions. Instruct patients to stop taking bupropion and contact a health care provider if neuropsychiatric reactions occur.

Ocular effects

May cause mild pupillary dilation, which in susceptible individuals can lead to an episode of narrow-angle glaucoma. Consider evaluating patients who have not had an iridectomy for narrow-angle glaucoma risk factors.

Psychosis

May cause delusions, hallucinations, psychosis, concentration disturbance, paranoia, and confusion; most common in depressed patients and patients with a diagnosis of bipolar disorder. Symptoms may abate with dose reduction and/or withdrawal of treatment.

Seizures

May cause a dose-related risk of seizures. Use is contraindicated in patients with a history of seizures or certain conditions with high seizure risk (eg, history of anorexia/bulimia or patients undergoing abrupt discontinuation of ethanol, benzodiazepines, barbiturates, or antiepileptic drugs). Aplenzin, Forfivo XL, and Wellbutrin XL are also contraindicated in patients with certain conditions with high seizure risk (eg, arteriovenous malformation, severe head injury, severe stroke, CNS tumor, and CNS infection). Use caution with concurrent use of antipsychotics, antidepressants, theophylline, systemic corticosteroids, stimulants (including cocaine), anorexiants, or hypoglycemic agents, or with excessive use of ethanol, benzodiazepines, sedative/hypnotics, or opioids. Use with caution in seizure-potentiating metabolic disorders (hypoglycemia, hyponatremia, severe hepatic impairment, and hypoxia). The dose-dependent risk of seizures may be reduced by gradual dose increases and by not exceeding the maximum daily dose. Do not coadminister with other bupropion-containing formulations; Forfivo XL is contraindicated in patients receiving other dosage forms of bupropion. Permanently discontinue if seizure occurs during therapy. Chewing, crushing, injecting, or dividing long-acting products may increase seizure risk.

Sexual dysfunction

The incidence of sexual dysfunction with bupropion is generally lower than with SSRIs (Clayton 2004).

Weight loss

May cause weight loss; use caution in patients where weight loss is not desirable. Disease-related concerns:

ADHD (off-label use)

All children diagnosed with ADHD who may be candidates for stimulant medications should have a thorough cardiovascular assessment to identify risk factors for sudden cardiac death prior to initiation of drug therapy.

Cardiovascular disease

Use with caution in patients with cardiovascular disease, history of hypertension, or coronary artery disease; treatment-emergent hypertension (including some severe cases) has been reported, both with bupropion alone and in combination with nicotine transdermal systems.

Hepatic impairment

Use with caution in patients with hepatic impairment; consider a reduction in dose and/or frequency; Forfivo XL is not recommended in patients with hepatic impairment.

Renal impairment

Use with caution in patients with renal impairment; consider a reduction in dose and/or frequency; Forfivo XL is not recommended in patients with renal impairment. Concurrent drug therapy issues:

Drug-drug interactions

Potentially significant interactions may exist, requiring dose or frequency adjustment, additional monitoring, and/or selection of alternative therapy. Consult drug interactions database for more detailed information. Special populations:

Elderly

Use with caution in the elderly; may be at greater risk of drug accumulation during chronic dosing. Consider a reduction in dose. Dosage form specific issues:

Extended release tablet

Insoluble tablet shell may remain intact and be visible in the stool. Other warnings/precautions:

Abuse/misuse

Using doses higher than prescribed may result in increased motor activity, agitation/excitement and euphoria. Inhalation of crushed tablets or injection of dissolved bupropion has been reported, some resulting in seizures and death.

Electroconvulsive therapy (ECT)

May increase the risks associated with ECT; consider discontinuing, when possible, prior to ECT treatment (APA 2010).

Pregnancy & Lactation

Pregnancy

FDA category C

Adverse events have been observed in some animal reproduction studies. Bupropion and its metabolites were found to cross the placenta in in vitro studies (Earhart 2012). An increased risk of congenital malformations has not been observed following maternal use of bupropion during pregnancy; however, data specific to cardiovascular malformations is inconsistent. The long-term effects on development and behavior have not been studied. The ACOG recommends that antidepressant therapy during pregnancy be individualized; treatment of depression during pregnancy should incorporate the clinical expertise of the mental health clinician, obstetrician, primary health care provider, and pediatrician. According to the American Psychiatric Association (APA), the risks of medication treatment should be weighed against other treatment options and untreated depression. For women who discontinue antidepressant medications during pregnancy and who may be at high risk for postpartum depression, the medi

Lactation

RID 2.0%

Bupropion and its active metabolites are present in breast milk. The manufacturer reports the relative infant dose (RID) of bupropion and its active metabolites to be ~2% of a weight-adjusted maternal dose. In one report, the RID of bupropion ranged from 1.4% to 10.6% of the maternal dose when calculated using actual infant weights and maternal doses ranging from 150 to 300 mg/day (Davis 2009). In general, breastfeeding is considered acceptable when the RID is 25%, breastfeeding should general

Monitoring

Clinical pearlBody weight; mental status for depression, suicidal ideation (especially at the beginning of therapy or when doses are increased or decreased), anxiety, social functioning, mania, panic attacks; blood pressure (baseline and periodically especially when used in conjunction with nicotine transdermal replacement); renal and hepatic function When used for the treatment of ADHD, thoroughly evaluate for cardiovascular risk. Monitor heart rate, blood pressure, and consider obtaining ECG prior to initiation (Vetter 2008).

Chemistry & Properties

2D structure
FormulaC13H18ClNO
Molecular weight239.75 g/mol
IUPAC name2-(tert-butylamino)-1-(3-chlorophenyl)propan-1-one
CAS34911-55-2
PubChem CID444
InChIKeySNPPWIUOZRMYNY-UHFFFAOYSA-N
logP3.3 (XLogP 3.2)
Polar surface area29.1 Ų
H-bond acceptors / donors2 / 1
Drug-likeness (QED)0.82
Lipinski violations0
SMILESCC(NC(C)(C)C)C(=O)c1cccc(Cl)c1

Biology & Pharmacokinetics

Pharmacokinetics

BBB penetrantYes (logBB 1.4)

Enzyme interactions

EnzymeRoleDetail
CYP1A2Substrate
CYP2B6Substrate
CYP2C19Inhibitor IC₅₀ 1.9982999999999993 µM
CYP2C19Substrate
CYP2C9Substrate
CYP2D6Inhibitor
CYP2D6Substrate

Receptor binding (top 10)

TargetActionAffinity
NET (SLC6A2) Inhibitor pKi 6.4
DAT (SLC6A3) Inhibitor pIC50 6.3
Dopamine Transporter (SLC6A3) Binding pKi 6.1
Cholinergic, Nicotinic Alpha3Beta4 Binding pKi 5.7
adrenergic Alpha1 Binding pKi 5.4
Alpha 1 Adrenergic Receptor Binding pKi 5.3
H1 Binding pKi 5.2
Norepinephrine transporter (SLC6A2) Binding pKi 5.2
Cholinergic, nicotinic Alpha1 Binding pKi 5.1
5-HT Transporter (SLC6A4) Binding pKi 5.0

Transporters

BCRP (Inhibitor)BCRP (Inhibitor)BSEP (Inhibitor)BSEP (Inhibitor)MRP1 (Inhibitor)MRP2 (Inhibitor)MRP4 (Inhibitor)OATP1B1 (Inhibitor)OATP1B1 (Inhibitor)OATP1B3 (Inhibitor)OATP1B3 (Inhibitor)OATP2B1 (Inhibitor)OCT2 (Inhibitor)OCTN2 (Inhibitor)P-gp (Inhibitor)BCRP (Substrate)MDR1 (Substrate)P-gp (Substrate)

Drug–drug interactions (100+, DDInter)

Interacting drugSeverityManagement
Aldesleukin major
Alfentanil major
Alimemazine major
Amantadine major
Amifampridine major
Aminophylline major
Amitriptyline major
Amoxapine major
Amphetamine major
Apalutamide major
Aripiprazole major
Asenapine major
Benzhydrocodone major
Benzphetamine major
Betamethasone major
Bethanechol major
Blinatumomab major
Brexpiprazole major
Buprenorphine major
Butorphanol major
Cariprazine major
Cefiderocol major
Chloroquine major
Chlorpromazine major
Cinoxacin major
Ciprofloxacin major
Citalopram major
Clomipramine major
Clozapine major
Cocaine (nasal) major
Codeine major
Corticotropin major
Cyclobenzaprine major
Cycloserine major
Dalfampridine major
Deflazacort major
Delafloxacin major
Desipramine major
Desvenlafaxine major
Deutetrabenazine major

Showing 40 of 100+.

Registered Products (1)

BrandForm / strengthPackAgentCitizen (JOD)
Bupran SR Tablet 150 mg 30 tab JORDAN SWEDEN MEDICAL&STERILE.CO(JOSWE)/JORDAN 14.420