— Online, Barra da Tijuca, Ipanema, and Copacabana

Dr. Guilherme Bretas Guimarães

Psychiatrist — RQE: 54079

Clinical practice and research in Bipolar Disorder; member of the International Society for Bipolar Disorders.
Treatment for binge eating, insomnia, anxiety, and other mental health conditions.
DR. GUILHERME BRETAS PSYCHIATRIST CRM/RJ: 118412-1 | RQE: 54079
Psiquiatra
About

About me

I am a psychiatrist trained at the Federal Fluminense University (UFF), a Full Member of the Brazilian Psychiatric Association (ABP), and a member of the International Society for Bipolar Disorders (ISBD). My clinical and academic work is dedicated to the study, diagnosis, and treatment of Mood Disorders, with a special focus on Bipolar Disorder—the area in which I concentrate my main scientific, clinical, and educational interests.

I work at the Center for Research and Education on Bipolar Disorder at the Federal University of Rio de Janeiro (IPUB/UFRJ), CEBIP, and I am a former university professor. I began my Psychiatry training at UFF and deepened my clinical experience at UFRJ, especially in the Treatment-Resistant Depression Outpatient Clinic, caring for patients with severe, chronic, and difficult-to-manage conditions. I completed two postgraduate programs in Bipolar Disorder with Dr. Renato Silva, a leading Brazilian expert in the field, and contributed to his new book scheduled for release in August 2026; I pursued advanced training with Dr. Diego Tavares, a psychiatrist at GRUDA/USP; and completed a fellowship with the coordinator of USP’s Treatment-Resistant Depression, Self-Harm, and Suicidality Outpatient Clinic.

In clinical practice, I provide comprehensive psychiatric care that considers not only emotional symptoms, but also sleep, routine, functioning, performance, eating habits, and quality of life. I also treat binge eating and care for patients seeking healthy weight loss, helping identify emotional, behavioral, and psychiatric factors that may make weight loss and maintaining results more difficult.

I have a particular connection with and experience in caring for students preparing for university entrance exams and competitive public examinations, because I understand firsthand the pressure, anxiety, self-imposed demands, and fear of failure that are common at this stage. I believe mental health care can be decisive in turning potential into results. In recent years, I have treated patients admitted to Medicine at UFRJ, UERJ, and other universities, making this one of the most meaningful areas of my clinical practice.

Beyond clinical care, I am deeply involved in medical education and scientific development. I am a former professor at the Valença School of Medicine, teach physicians, psychologists, and health sciences students, and am a member of CINP (International College of Neuropsychopharmacology), an international organization dedicated to advancing research and education in neuropsychopharmacology. I regularly attend national and international conferences, including the Brazilian Congress of Psychiatry, Brain, the American Psychiatric Association Annual Meeting, and the European Congress of Psychiatry, maintaining a practice grounded in the best scientific evidence. I see patients in Ipanema, Barra da Tijuca, Copacabana, and online, providing specialized, technical, and compassionate psychiatric care.

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About

Psychiatrist with a dedicated focus on Bipolar Disorder

I have years of experience treating Bipolar Disorder, supported by several specializations dedicated to this field. I also work extensively with binge eating and healthy weight loss, always paying close attention to treatment side effects, avoiding weight gain and medications with dependence potential.I am also especially dedicated to supporting students preparing for university entrance exams and competitive public examinations, helping patients prepare for demanding tests such as Enem, UERJ, Fuvest, and others.
Ipanema

Rua Visconde de Pirajá, 550, 13th floor, suite 1312.

Barra da Tijuca

Shopping Downtown, Block 20, Suite 309.

Copacabana

Av. Nossa Senhora de Copacabana, 749, Suite 1202.

Specialist in Bipolar Disorder with extensive experience in Depression, Anxiety, Insomnia, Binge Eating, OCD, and other conditions

Appointments throughout my career
+ 0
Knowing how to listen—important in every area of medicine—is crucial when treating psychological disorders. In addition, empathy within a safe and confidential environment is the key that makes it possible to begin addressing the problem, guide treatment, and work toward a solution.
Dr. Guilherme Bretas, Psychiatrist — RQE: 54079

Conferences, training, and academic teaching and research activities

01.
Conferences and courses

I stay continuously up to date by attending national and international conferences. I regularly participate in scientific events in cities such as New York, Los Angeles, San Francisco, and Munich, as well as other relevant international conferences, ensuring a practice aligned with the latest evidence in psychiatry.

02.
Support during university entrance exams and competitive examinations

Caring for students preparing for university entrance exams and competitive public examinations is one of the areas I most enjoy in my clinical practice. I help patients facing the pressure of highly competitive tests such as Enem, UERJ, Fuvest, and other entrance and public examinations, focusing on anxiety, sleep, concentration, routine, and performance, because I know that caring for mental health can be decisive in turning potential into results.

03.
Full Member of the Brazilian Psychiatric Association — RQE: 54079

I have a special interest in the diagnosis and treatment of **insomnia** and other sleep disorders, seeking to offer an approach based on the best scientific evidence. In June 2026, I completed advanced training in **Sleep Medicine** at the **Instituto do Sono**, covering insomnia, sleep neurophysiology, assessment methods in Sleep Medicine, and the relationship between sleep disorders and psychiatric conditions such as bipolar disorder, depression, anxiety, schizophrenia, and substance dependence.

04.
Fellowship and training in Bipolar Disorder

I completed a fellowship in mood disorders under the supervision of the coordinator of the Treatment-Resistant Depression, Self-Harm, and Suicidality Outpatient Clinic at the Institute of Psychiatry of the University of São Paulo Hospital das Clínicas. I complemented my training with two postgraduate programs in bipolar disorder with Dr. Renato Silva, as well as advanced training with Dr. Diego Freitas Tavares, a psychiatrist at GRUDA/IPq-USP and coordinator of the Integrated Bipolar Disorder Outpatient Clinic (AIBIP), consolidating a highly specialized practice in the field. I also completed two postgraduate programs in Mood Disorders.

Care

Clear communication and comprehensive patient support.

I work with a dedicated administrative team prepared to provide clear, welcoming communication and prompt responses, ensuring efficient scheduling, attentive follow-up, and thoughtful support at every stage of patient care.
In fact, the greatest expert is the patient, because the patient is the one who lives with the problem. My role is to make my scientific knowledge available to those who seek my care, aiming for the most appropriate evaluation and the best available treatment, with the goal of guiding each patient toward well-being and stability.
What we offer

Psychiatry appointments

Binge Eating
I have a special interest in caring for patients with binge eating because I see healthy weight loss as part of comprehensive mental and physical health care. I support patients through this process responsibly, respectfully, and individually, seeking not only weight reduction but also a healthier relationship with the body and with food.
Binge Eating
I have a special interest in caring for patients with binge eating because I see healthy weight loss as part of comprehensive mental and physical health care. I support patients through this process responsibly, respectfully, and individually, seeking not only weight reduction but also a healthier relationship with the body and with food.
Schedule an Appointment
Bipolar Disorder
In pursuit of stability, I work with dedication in the treatment of bipolar disorder, a field in which I have specialist and postgraduate training as well as ongoing experience in research and teaching.
Bipolar Disorder
In pursuit of stability, I provide specialized treatment for bipolar disorder, a field in which I have specialist and postgraduate training as well as ongoing experience in research and teaching.
Schedule an Appointment
Insomnia and Training at Instituto do Sono
I am committed to staying up to date with the best therapeutic approaches and medical interventions in Sleep Medicine. In June 2026, I completed a course at Instituto do Sono covering sleep neurophysiology, insomnia, narcolepsy, parasomnias, circadian rhythm disorders, sleep-related movement disorders, assessment methods in Sleep Medicine, the relationship between sleep and mood disorders, anxiety disorders, schizophrenia, alcohol and other substance dependence, psychogeriatrics, and the effects of psychiatric medications on the sleep-wake cycle.
Insomnia
I am committed to staying up to date with the best therapeutic approaches and medical interventions in Sleep Medicine.
Schedule an Appointment
Anxiety Attack
I have extensive experience treating panic attacks and anxiety disorders, built through thousands of appointments over my career. The goal is to relieve symptoms, reduce recurrences, and help patients regain confidence, autonomy, and quality of life, always using effective, up-to-date approaches.
Panic Attack
I have extensive experience treating panic attacks and anxiety disorders, providing careful, technical, and individualized care. The goal is to relieve symptoms, reduce recurrences, and help patients regain confidence, autonomy, and quality of life, always using effective, up-to-date approaches.
Schedule an Appointment
Schedule your appointment!

Send us a message and let's connect.

Feel free to contact us!

(21) 96811-4819

secretariadrguilhermeb@gmail.com

Locations

Ipanema / Barra da Tijuca / Copacabana

Success stories: strengthening lives through compassionate guidance

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