Ketamine Therapy for Treatment-Resistant Depression in Irvine, California: What Patients Should Know

Depression can affect mood, energy, sleep, motivation, relationships, work, and overall quality of life. For many people, standard treatments such as antidepressant medication and therapy can be helpful. However, some patients continue to experience significant symptoms despite trying multiple treatment approaches.

This is often referred to as treatment-resistant depression. Ketamine therapy has become an important option that some patients and providers consider when depression has not improved with more traditional treatments.

At Spectrum Psychiatry, we provide psychiatric care for adults in Irvine, Orange County, and surrounding communities. For patients struggling with depression, a careful evaluation can help determine which treatment options may be appropriate.

What Is Treatment-Resistant Depression?

Treatment-resistant depression generally refers to depression that has not improved enough after trying standard treatments. This may include antidepressant medications, psychotherapy, lifestyle changes, or other evidence-based approaches.

Not every person who continues to feel depressed has the same underlying cause. Symptoms may be influenced by anxiety, trauma, ADHD, sleep problems, substance use, medical conditions, chronic stress, or medication side effects. This is why a complete psychiatric evaluation is important before changing or adding treatment.

Patients with treatment-resistant depression often describe feeling discouraged after multiple attempts to feel better. They may wonder whether anything will help. While no treatment is right for everyone, additional options may be available.

What Is Ketamine Therapy?

Ketamine is a medication that has been used in medical settings for many years. In psychiatric care, ketamine-based treatments may be considered for certain patients with depression, especially when symptoms have not responded adequately to standard treatments.

Ketamine appears to work differently from many traditional antidepressants. Rather than primarily targeting serotonin or norepinephrine, ketamine affects glutamate-related pathways in the brain. These pathways are involved in mood regulation, neuroplasticity, and the way brain cells communicate.

Because ketamine therapy is a specialized treatment, it should be provided only under appropriate medical supervision and after a careful review of risks, benefits, medical history, and treatment goals.

Who May Be a Candidate for Ketamine Therapy?

Ketamine therapy may be considered for adults with depression who have not experienced adequate improvement from standard treatment options. It may also be considered when symptoms are severe and require a more specialized treatment discussion.

A patient may benefit from a ketamine consultation if they have:

• Depression that has not improved with prior treatments
• Persistent low mood, hopelessness, or loss of interest
• Difficulty functioning at work, school, or home
• Ongoing symptoms despite antidepressant medication
• Depression with significant anxiety or emotional distress
• A desire to explore additional treatment options

Ketamine therapy is not appropriate for everyone. Medical history, psychiatric history, medication use, substance use history, blood pressure concerns, and other factors must be reviewed before treatment is considered.

What to Expect Before Starting Ketamine Treatment

Before ketamine therapy is considered, patients typically complete a psychiatric evaluation. This may include a review of current symptoms, prior diagnoses, previous medications, therapy history, medical conditions, sleep patterns, substance use, family history, and current stressors.

The goal is to determine whether ketamine therapy may be appropriate and whether other treatment options should also be considered. Your provider may also discuss safety precautions, expectations, possible side effects, and follow-up planning.

Patients should feel comfortable asking questions before beginning treatment. Understanding the process can help reduce anxiety and support informed decision-making.

Potential Benefits of Ketamine Therapy

Some patients report improvement in mood, emotional flexibility, or ability to engage in daily life after ketamine-based treatment. For individuals who have struggled with depression for a long time, even partial improvement may feel meaningful.

Ketamine therapy may be especially important to discuss when depression has remained severe despite standard care. However, response varies, and ketamine should be understood as one possible treatment option rather than a guaranteed solution.

The most effective care often includes a broader treatment plan, which may involve medication management, therapy, lifestyle changes, sleep improvement, stress reduction, and ongoing psychiatric follow-up.

Possible Side Effects and Safety Considerations

Like all medical treatments, ketamine therapy can have side effects. These may include temporary changes in perception, dizziness, nausea, changes in blood pressure, dissociation, sedation, or feeling disconnected during or shortly after treatment.

Safety screening is important. Patients with certain medical or psychiatric conditions may not be good candidates. This is why ketamine therapy should not be started without professional evaluation and medical oversight.

If ketamine therapy is part of a treatment plan, follow-up care is important to monitor response, side effects, mood changes, and longer-term progress.

Ketamine Therapy and Ongoing Psychiatric Care

Ketamine therapy should not be viewed as a replacement for comprehensive mental health care. Depression is often complex, and long-term improvement usually requires ongoing support and monitoring.

Psychiatric care can help identify coexisting conditions such as anxiety, ADHD, trauma symptoms, sleep disorders, or substance use concerns that may affect depression treatment. Addressing the full picture can improve the chances of meaningful recovery.

You can learn more about our Depression Treatment in Irvine services for adults experiencing persistent mood symptoms.

Ketamine Treatment in Irvine and Orange County

Spectrum Psychiatry serves patients in Irvine and throughout Orange County, including Newport Beach, Costa Mesa, Tustin, Lake Forest, Mission Viejo, Santa Ana, Laguna Hills, and nearby communities.

If depression has not improved with standard care, a professional evaluation can help determine whether ketamine therapy or another treatment approach may be appropriate.

You can also learn more about our psychiatrist services in Irvine, CA for broader psychiatric care in Orange County.

Medically Reviewed By

Dr. Gulay Tegin, MD

Psychiatrist

This article has been medically reviewed by Dr. Gulay Tegin, MD to ensure accuracy and alignment with current psychiatric and evidence-based depression treatment practices.

Last reviewed: June 2026