Dr. Gilles Chagnon

Dr. Gilles Chagnon provides assessment and treatment for a wide spectrum of mental health conditions, including:

Substance-Related & Addictive Disorders (Dual Diagnosis)

• Opioid Use Disorder: A problematic pattern of opioid use leading to clinically significant impairment or distress.
• Gambling Disorder (Behavioral Addiction): Persistent and recurrent problematic gambling behavior leading to clinically significant impairment or distress.
• Cannabis Use Disorder: Continued use of cannabis despite clinically significant impairment or distress.

Personality Disorders

• Antisocial Personality Disorder (ASPD): A pattern of disregarding or violating the rights of others, often involving deceitfulness, impulsivity, irritability, and lack of remorse.
• Borderline Personality Disorder (BPD): Characterized by instability in interpersonal relationships, self-image, emotions, and marked impulsivity.
• Avoidant Personality Disorder: Characterized by social inhibition, feelings of inadequacy, and hypersensitivity to negative evaluation.

Mood Disorders

• Seasonal Affective Disorder (SAD): A type of depression related to changes in seasons, most commonly beginning in the fall and continuing through the winter months.
• Premenstrual Dysphoric Disorder (PMDD): A severe form of premenstrual syndrome (PMS) with significant mood swings, irritability, depression, or anxiety in the week or two before menstruation.
• Adjustment Disorder with Depressed Mood: Development of emotional or behavioral symptoms like sadness or hopelessness in response to an identifiable stressor occurring within 3 months of the onset of the stressor.

This list is not exhaustive. Effective mental health care is highly personalized. Please consult with Dr. Gilles Chagnon for an accurate diagnosis and tailored treatment plan.

• Couples & Family Therapy (psychiatric context): Providing therapy to couples or families to address relationship dynamics, communication problems, and the impact of mental illness on the family system.
• Psychopharmacological Management & Medication Optimization: Prescribing, monitoring, and adjusting psychotropic medications (e.g., antidepressants, antipsychotics, mood stabilizers, anxiolytics, stimulants) to treat various mental health disorders, focusing on efficacy, tolerability, and minimizing side effects.
• Crisis Intervention & Urgent Psychiatric Assessment (in appropriate settings): Providing rapid assessment and intervention for individuals experiencing acute psychiatric crises, such as suicidal ideation, acute psychosis, or severe agitation, typically in emergency departments or crisis clinics.
• Management of Sleep Disorders (Insomnia, Parasomnias - psychiatric aspects): Pharmacological and behavioral approaches to treating sleep difficulties that are secondary to or co-occurring with psychiatric conditions.
• Neuropsychiatric Evaluation & Cognitive Assessment (Initial Screening/Referral): Initial assessment of cognitive function and neuropsychiatric symptoms, with referral for detailed neuropsychological testing if indicated, to differentiate psychiatric from neurological conditions.
• Comprehensive Psychiatric Assessment & Diagnostic Evaluation: In-depth clinical interview to assess mental health status, including review of psychiatric and medical history, family history, psychosocial factors, symptom patterns, and formulation of a multiaxial diagnosis according to DSM/ICD criteria.

Note: This list provides a general overview. Treatment approaches are highly individualized. Please discuss with Dr. Chagnon for care relevant to your specific mental health needs.

All psychiatric services are provided in accordance with the standards of practice set by the Collège des médecins du Québec (CMQ) and relevant psychiatric care guidelines. Contact the clinic or your referring physician regarding new patient intake and referral processes.

Maison Dufferin is situated in Sherbrooke's Fleurimont West (Hospital Area) neighbourhood, within walking distance of Bishop's University and easily accessible by public transit via the Société de transport de Sherbrooke (STS). The facility is wheelchair accessible and aims to provide a comfortable and private environment for all patients. Parking is available at or near the facility, with designated accessible spots. The practice strives to maintain a discreet, welcoming atmosphere, ensuring patients feel secure and respected throughout their mental health journey.

Are psychiatric consultations and treatments with Chagnon, a Psychiatrist, covered by Régie de l'assurance maladie du Québec (RAMQ) in QC?

Medically necessary consultations, diagnostic assessments, and medication management provided by a licensed Psychiatrist like Chagnon are generally covered by Régie de l'assurance maladie du Québec (RAMQ) in QC when a referral from a family doctor is in place. Coverage for psychotherapy services provided by a psychiatrist can vary; some provinces cover it, while others may have limitations or it may be part of hospital-based programs. Specific medications may also require special authorization or be subject to formulary restrictions. It's crucial to discuss coverage specifics for therapy or any specialized treatments with Chagnon's office or Régie de l'assurance maladie du Québec (RAMQ).

Do I need a referral to see Chagnon, a Psychiatrist?

Yes, a referral from your family physician or another medical doctor (e.g., a pediatrician for child psychiatry, or an ER physician for urgent assessment) is almost always required to see a Psychiatrist such as Chagnon for services covered by the provincial health plan. Mental health conditions often benefit from initial assessment by a primary care provider who can determine the need for specialist psychiatric care. The referral ensures coordinated care, appropriate triaging, and transfer of relevant medical history.

What is the main difference between a Psychiatrist like Chagnon and a Psychologist?

The main difference is that a Psychiatrist, like Chagnon, is a medical doctor (MD) who has completed medical school and then specialized residency training in psychiatry. Because they are physicians, psychiatrists can diagnose mental health conditions, prescribe and manage psychotropic medications, and provide various forms of psychotherapy. They can also order medical tests to rule out physical causes of psychiatric symptoms. A Psychologist typically has a doctoral degree (PhD or PsyD) in psychology and is trained in psychological assessment, diagnosis, and providing psychotherapy (talk therapy). Psychologists generally cannot prescribe medication in Canada, though they often work closely with psychiatrists or family doctors who do.

Does Chagnon offer psychotherapy (talk therapy)?

Many psychiatrists, including potentially Chagnon, are trained in various forms of psychotherapy (talk therapy) and may offer it as part of their treatment approach, either as a standalone treatment or in combination with medication. The specific types of psychotherapy offered can vary (e.g., Cognitive Behavioral Therapy - CBT, psychodynamic therapy, supportive therapy). It's best to inquire directly with Chagnon's office or discuss this during your initial consultation to understand his approach to therapy and if it's a service He provides or if He would refer you to another mental health professional like a psychologist or social worker for more intensive or specialized psychotherapy if needed.

What if I experience side effects from medication prescribed by Chagnon?

It's common for psychotropic medications to have potential side effects, especially when starting a new medication or adjusting a dose. Chagnon will discuss common side effects to watch for. If you experience side effects, it's very important to communicate this to Chagnon or his office promptly. Do not stop taking your medication suddenly unless instructed to do so by Chagnon, as this can sometimes cause withdrawal symptoms or a worsening of your condition. Chagnon can help manage side effects by adjusting the dosage, switching to a different medication, or suggesting strategies to mitigate them.

How can I prepare for my first appointment with Chagnon?

For your first psychiatric appointment with Chagnon, it's helpful to gather some information beforehand. Try to make a list of your main concerns, symptoms (including when they started, how often they occur, and their intensity), and any significant life events or stressors. Bring a list of all current medications (psychiatric and non-psychiatric), including dosages, as well as any past psychiatric medications you've tried and your experience with them. Information about your family history of mental health conditions can also be very useful. Be prepared to discuss your personal history, social situation, and coping strategies. Writing down any questions you have for Chagnon can also ensure you get the most out of your consultation.

Maison Dufferin
102-446 rue Dufferin
Sherbrooke, QC J1H 4M8

Phone: (873) 878-2488

The facility is wheelchair accessible and aims to provide a comfortable and private environment for all patients.

Dr. Chagnon is a licensed Psychiatrist regulated by the Collège des médecins du Québec (CMQ) under the Medical Act in QC. A referral from a family physician or another medical doctor is typically required for consultations with Dr. Chagnon for services covered by the provincial health plan.

Verify registration with the Collège des médecins du Québec (CMQ): https://www.cmq.org/en/directory/physicians?number=84026