How quickly does bupropion act?

Bupropion may start to have some effects within the first few days of treatment, but it typically takes several weeks to reach its full therapeutic effect. The exact timeline for when bupropion starts to work can vary depending on the individual and their specific condition.

For example, some people may start to feel improvements in mood, energy, and motivation within the first week or two of taking bupropion, while others may not notice significant changes until several weeks into treatment. It is important to continue taking the medication as prescribed and to be patient as it can take time for the medication to reach its full effect.

If you are not experiencing any improvements in your symptoms after several weeks of taking bupropion, it is important to discuss this with your healthcare provider. They can help determine if any changes to the medication regimen are needed to address these issues.

It is important to only take bupropion as prescribed by a healthcare provider and to follow their instructions carefully. If you have any questions or concerns about your medication regimen, it is important to discuss these with your healthcare provider.


There are various forms of drugs available, such as tablets or liquids, and each may have a separate patient information leaflet (PIL) for different doses. It is important to refer to the PIL for the specific form and dose of the drug that you have been prescribed.

You can search for further information and PILs on websites such as:

  • The British National Formulary (BNF)
  • Electronic medicines compendium (emc)
  • The National Library of Medicine's DailyMed
  • The Food and Drug Administration (FDA) 
  • Different drug forms like tablets or liquids have specific patient information leaflets (PIL) for various doses. Refer to the PIL for your prescribed drug form and dose.

    Search for PILs on websites like:

    France

    • ANSM (Agence nationale de sécurité du médicament et des produits de santé): ansm.sante.fr

    Spain

    • AEMPS (Agencia Española de Medicamentos y Productos Sanitarios): aemps.gob.es

    Germany

    • BfArM (Bundesinstitut für Arzneimittel und Medizinprodukte): bfarm.de

    Italy

    For questions about your medication:

    • Consult your doctor, a healthcare professional, or a pharmacist

    France

    • Contact SOS Médecins: 3624
    • For mental health support, contact SOS Suicide: 01 45 39 40 00

    Belgium (French)

    Switzerland (French)

    • La Main Tendue: 143
    • Website: 143.ch

    Canada (French)

    • Centre de prévention du suicide du Québec: 1 866 APPELLE (1 866 277-3553)
    • Website: cpsquebec.ca

    Spain

    • Contact emergency number: 112
    • For mental health support, contact Teléfono de la Esperanza: 717 003 717

    Germany

    • Contact emergency number: 112
    • For mental health support, contact Telefonseelsorge: 0800 111 0 111 or 0800 111 0 222

    Italy

    • Contact emergency number: 112
    • For mental health support, contact Telefono Amico: 199 284 284

    Netherlands

    • Contact emergency number: 112
    • For mental health support, contact 113 Zelfmoordpreventie: 0800 0113

    Portugal

    • Contact emergency number: 112
    • For mental health support, contact Sos Voz Amiga: 21 354 45 45, 91 280 26 69, or 96 352 46 60

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