Tag: Bupropion

  • 📌 CANMAT Guidelines for Depression: Evidence-Based Treatment Strategies

    📌 CANMAT Guidelines for Depression: Evidence-Based Treatment Strategies

    The CANMAT 2016 guidelines remain one of the most comprehensive, evidence-based frameworks for treating major depressive disorder (MDD). These guidelines emphasize a stepwise, individualized approach based on efficacy, safety, and patient preference. Here’s a breakdown of the key recommendations:

    🔹 First-Line Treatments

    ✅ Psychotherapy â€“ Cognitive Behavioral Therapy (CBT), Interpersonal Therapy (IPT), and Mindfulness-Based CBT are recommended, especially for mild to moderate depression.
    ✅ Pharmacotherapy â€“ SSRIs, SNRIs, bupropion, mirtazapine, and vortioxetine are all first-line antidepressantsbased on efficacy and tolerability.
    ✅ Neurostimulation â€“ Electroconvulsive Therapy (ECT) and Repetitive Transcranial Magnetic Stimulation (rTMS) are considered first-line for severe or treatment-resistant depression (TRD).

    🔹 Second-Line Treatments

    🔸 Other antidepressants â€“ Tricyclics (TCAs), trazodone, moclobemide, and some atypical antipsychotics (e.g., quetiapine XR, aripiprazole, brexpiprazole)
    🔸 Adjunctive strategies â€“ Lithium, atypical antipsychotics, or combination antidepressant therapy for partial responders
    🔸 Ketamine/esketamine â€“ Emerging evidence for TRD

    🔹 Third-Line & Beyond

    🔹 MAOIs (reserved for treatment-resistant cases)
    🔹 Novel agents (psilocybin, anti-inflammatory treatments) – Experimental but promising

    💡 Key Takeaways
    🔹 Personalized treatment is essential – factors like symptom profile, comorbidities, and patient preference influence the best approach.
    🔹 Combination strategies (meds + psychotherapy) often yield superior outcomes.
    🔹 Treatment-resistant depression requires a multimodal approach, including augmentation, switching strategies, and neurostimulation options.

    The CANMAT guidelines are a critical resource for clinicians, offering a structured approach to optimizing depression treatment. What are your go-to strategies for managing MDD? Let’s discuss!

    #DepressionTreatment #Psychiatry #CANMAT #MDD #Psychopharmacology

  • New medication Monday: Combination Dextromethorphan and Bupropion AXS-05

    New medication Monday: Combination Dextromethorphan and Bupropion AXS-05

    The result of research to develop a nonaddictive cough suppressant produced dextromethorphan. It was FDA approved in 1954 but the pharmacology of this cough suppressant is complex. It functions as an uncompetitive NMDA-glutamate blocker (thin ketamine), sigma-1 stimulator, and serotonin reuptake inhibitor. It should start to become clear why there is renewed interest in this medication. 

    Bupropion functions as a selective norepinephrine/dopmaine reuptake inhibitor. It’s currently used to treat depression, seasonal affective disorder, and nicotine dependence. Recent research suggests it acts as a potent inhibitor of cytochrome P450 2D6 (CYP2D6). Understanding the cytochrome P450 system is not a primary concern here but this enzyme metabolizes dextromethorphan. 

    The combination of these two drugs dextromethorphan 45 mg and bupropion 105 mg two times per day is AXS-05. The proposed mechanism is prolongation of dextromethorphan activity by CYP2D6 inhibition with the added benefit of norepinephrine/dopamine reuptake inhibition. 

    A phase-3 RCT of AXS-05 in patients with MDD outperformed placebo and improved depression scores over 6 weeks.