Same-Day Appointments | Telehealth 7 Days a Week, 9am–9pm | Board-Certified Physician | Most Insurances Accepted
Medically Reviewed & Written By: Dr. Saleha Jafar, MD | Board-Certified: Addiction Medicine | Internal Medicine | Obesity Medicine Last updated : Dec 2025
Woman with seasonal affective disorder symptoms during winter
At Medivira, we provide compassionate, evidence-based care for Seasonal Affective Disorder — the recurring seasonal depression that goes far beyond the "winter blues."
Our physician offers personalized treatment combining light therapy, medication, and referral for behavioral care,if needed.
Our Frisco clinic provides in person appointments to residents of Frisco, Plano, Mckinney, Allen,Prosper, Celina and
Tele visits throughout Texas 7 days a week, from 9:00 AM to 9:00 PM with 24/7 after hours support.
We accept most major insurance plans, including Texas Medicaid, offer free initial consultations and same-day appointments
By the Numbers
of U.S. adults experience SAD each year (APA)
More common in women than in men
of all major depression cases have a seasonal component
Average duration of winter-pattern SAD episodes
What Causes It
The exact cause of SAD is not fully understood, but research points to several interconnected biological mechanisms triggered by reduced sunlight exposure during fall and winter months.
Reduced daylight in winter can disrupt the body's internal clock, leading to misalignment between biological rhythms and the external environment. This desynchronization contributes to the fatigue, sleep disturbances, and low mood characteristic of SAD.
Sunlight plays a key role in regulating serotonin — a neurotransmitter that influences mood, appetite, and sleep. Less light can lead to lower serotonin activity, which is directly associated with depressive symptoms.
The pineal gland produces more melatonin during longer, darker nights. People with SAD may be especially sensitive to this increase, resulting in excessive sleepiness, low energy, and mood disruption throughout the day.
Reduced sun exposure in winter months lowers the body's production of vitamin D, which plays a role in serotonin synthesis and has been associated with depressive symptoms in some individuals.
A family history of depression or SAD increases an individual's risk. Those with bipolar disorder are also at elevated risk for seasonal mood changes. Biological sensitivity to light changes varies significantly from person to person.
Recognizing the Signs
SAD symptoms typically emerge in late fall or early winter and resolve in spring. They can range from mild to severe and significantly impact daily life.
Feeling sad, hopeless, or empty for most of the day, nearly every day, throughout the affected season — not just occasional sadness.
Extreme tiredness, difficulty getting out of bed, and sleeping significantly more than usual — often still feeling unrefreshed upon waking.
Strong cravings for carbohydrates and comfort foods, overeating, and weight gain are hallmark features of winter-pattern SAD.
Pulling away from social activities, hobbies, and relationships that were previously enjoyable. Feeling isolated and disconnected.
Trouble focusing, making decisions, or completing tasks. Cognitive "fogginess" that interferes with work, school, or daily responsibilities.
Feeling unusually irritable, anxious, or on edge. Some individuals experience physical heaviness in the limbs and a sense of sluggishness throughout the day.
Getting Answers
There is no single lab test for Seasonal Affective Disorder. Diagnosis requires a careful clinical evaluation that rules out other medical and psychiatric conditions and establishes a clear seasonal pattern.
Your appointment at Medivira will include a comprehensive review of your mood, energy, sleep, appetite, and functioning across different times of year, as well as your personal and family medical history.
To meet diagnostic criteria for Seasonal Affective Disorder (under DSM-5), a patient must have experienced:
Our physician takes time to carefully distinguish SAD from other forms of depression, thyroid dysfunction, and other medical causes of fatigue and mood changes.
Evidence-Based Care
Medivira offers a personalized, evidence-based approach to treating Seasonal Affective Disorder. Our physician tailors treatment to each patient's symptom pattern, severity, lifestyle, and any co-occurring conditions.
Light therapy is one of the most effective and well-studied treatments for winter-pattern SAD. Daily exposure to a bright light box — typically 10,000 lux — helps reset the body's circadian rhythm and can significantly improve mood, energy, and sleep within one to two weeks.
CBT adapted for SAD — sometimes called CBT-SAD — is highly effective and has been shown to produce lasting results, even beyond the treatment period. It helps patients identify and restructure negative thought patterns, build behavioral activation strategies, and develop coping plans for future seasonal episodes.
Our physician provides guidance on evidence-supported lifestyle strategies that complement formal treatment — including maximizing natural light exposure, regular physical activity, sleep hygiene, nutrition, and social engagement — all of which have demonstrated benefit in managing seasonal mood changes.
Medication Options
Medication can be an important part of treatment for Seasonal Affective Disorder, particularly for moderate to severe cases or when therapy and light therapy alone are insufficient.
Bupropion extended-release (Wellbutrin XL) is the only medication with FDA approval specifically for the prevention of Seasonal Affective Disorder. It is typically started in early fall — before symptoms begin — and continued through the winter season.
Selective serotonin reuptake inhibitors (SSRIs) such as sertraline, fluoxetine, and escitalopram are frequently used to treat SAD, targeting the serotonin pathways most affected by reduced light exposure. Our physician selects medications based on symptom profile, co-occurring conditions, prior treatment history, and tolerability.
Your Provider
Board-Certified Physician · Frisco, Texas
At Medivira, our physician brings a thorough, individualized approach to evaluating and treating Seasonal Affective Disorder. Dr. Jafar understands that SAD often does not exist in isolation — it frequently co-occurs with anxiety disorders, other depressive conditions, sleep disorders, and substance use, all of which must be addressed together for meaningful, lasting improvement.
Rather than simply prescribing a medication and sending you home, our approach at Medivira is collaborative and comprehensive — combining the most effective treatments, monitoring your progress, and adjusting the plan as your needs change season to season.
How to See Us
Medivira offers flexible appointment options to make treatment as accessible as possible. Whether you prefer to come to our Frisco office or receive care from home, we're here for you.
Visit our Frisco, Texas office for a comprehensive in-person evaluation. In-person appointments allow for a thorough clinical assessment and direct connection with your care team — particularly valuable for initial evaluations and complex presentations.
Receive the same quality of care from the comfort of your own home. Telehealth is available to patients throughout Texas and is well-suited for initial consultations, medication management, therapy follow-ups, and ongoing seasonal monitoring.
Questions & Answers
Yes. Medivira provides comprehensive evaluation and treatment for Seasonal Affective Disorder in Frisco, Texas. Both in-person and telehealth appointments are available for patients throughout Texas.
Seasonal Affective Disorder is a clinically recognized subtype of major depressive disorder with a distinct seasonal pattern. It is diagnosable under DSM-5 criteria and has well-established biological mechanisms. While many people feel some mood dip in winter, SAD is characterized by significant, recurring depressive episodes that impair daily function — and it responds to specific, evidence-based treatments.
The key difference is the predictable seasonal pattern. Seasonal Affective Disorder follows a recurring cycle — symptoms appear at the same time each year, typically fall or winter, and resolve fully in the opposite season. Regular major depressive disorder does not follow this pattern. SAD also tends to present with specific features like hypersomnia, carbohydrate cravings, and weight gain, which are less typical in non-seasonal depression.
While it is normal to feel some fatigue or mood dip as daylight decreases, Seasonal Affective Disorder involves persistent, clinically significant depression that impairs your ability to function at work, school, or in relationships. If you notice the same pattern of low mood, excessive sleep, appetite changes, and withdrawal from life occurring every fall or winter and lifting in spring, it is worth speaking with a physician. A proper evaluation at Medivira can determine whether what you are experiencing meets the criteria for SAD.
The most common form is winter-pattern SAD, where symptoms emerge in fall and winter and remit in spring. However, a less common summer-pattern SAD also exists, characterized by symptoms during the longer, hotter days of spring and summer — including insomnia, agitation, decreased appetite, and anxiety. Both patterns are treatable.
Bupropion XL is the only FDA-approved medication specifically for preventing SAD. SSRIs such as fluoxetine, sertraline, and escitalopram are also commonly used. Our physician at Medivira will evaluate your full clinical picture — including symptom severity, co-occurring conditions, and treatment history — before recommending any medication.
Light therapy is highly effective for winter-pattern SAD, with studies showing response rates of 50–80%. It works by exposing the patient to bright artificial light each morning, which helps reset circadian rhythm and improve serotonin regulation. Many patients notice improvement within one to two weeks of consistent use. It can be used alone or in combination with medication and therapy for enhanced results.
Absolutely. SAD frequently co-occurs with anxiety disorders, bipolar disorder, ADHD, insomnia, and substance use disorders. Our physician is experienced in treating these conditions together, which leads to significantly better outcomes than addressing each in isolation. Medivira takes a whole-patient approach to care.
Yes. Seasonal Affective Disorder can affect children and adolescents, though it is more commonly diagnosed in adults. In younger patients, SAD may present as school avoidance, increased sleep, irritability, and withdrawal from friends and activities rather than classic adult depressive symptoms. If a child or teen shows a recurring seasonal pattern of mood and behavioral changes, a clinical evaluation is recommended.
Yes. Medivira offers telehealth appointments for patients throughout Texas. Telehealth is convenient for initial evaluations, medication management, and ongoing monitoring — and is particularly suitable for patients managing a condition that may limit their motivation to leave home during winter months.
SAD is by nature a recurring condition, but with proper treatment and preparation, many patients dramatically reduce the severity and duration of future episodes. Proactive strategies — such as starting light therapy or medication in early fall before symptoms emerge — are highly effective at preventing a full depressive episode. Our physician at Medivira will work with you to develop a long-term management plan tailored to your seasonal pattern.
While SAD is more prevalent in northern states with significantly reduced winter daylight, it is still commonly diagnosed in Texas. Frisco and the Dallas–Fort Worth area experience meaningful reductions in daylight hours and outdoor activity during fall and winter, which can trigger SAD in biologically susceptible individuals. Spending more time indoors, reduced outdoor activity, and individual biological sensitivity all play a role regardless of geographic latitude.