NCT04557891 · University of California, Los Angeles
Low-Intensity Focused Ultrasound Pulsation (LIFUP) for the Treatment of Generalized Anxiety Disorder (GAD)
What this study is about
There are few treatment options available for patients once they have failed standard psychopharmacological therapy for generalized anxiety disorder. Existing brain stimulation methods such as rTMS fail to target deep brain structures associated with anxiety disorders; structures such as the amygdala.
View original scientific description
There are few treatment options available for patients once they have failed standard psychopharmacological therapy for generalized anxiety disorder. Existing brain stimulation methods such as rTMS fail to target deep brain structures associated with anxiety disorders; structures such as the amygdala. In this double-blind sham-controlled clinical trial, the investigators propose to establish baseline severity of anxiety in 48 patients, then deliver eight treatments over four sessions of focused ultrasound stimulation to the amygdala. Anxiety severity will be assessed using standard psychometric scales after each session, and at follow-ups.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Male or female
- Normal or corrected-to normal vision and hearing
- Primary diagnosis of generalized anxiety disorder, moderate/severe per DSM-5. (HAM-A\>17) 4a) The duration of the illness must exceed one year.
- Must be medically stable as determined by investigator
- Patient must have attempted and failed treatment with at least 2 SSRI and 1 augmentation
- History of rTMS is permitted, but not required.
Exclusion criteria
- Diagnosis of primary DSM-5 anxiety disorder other than GAD 1a) Affective disorders such as unipolar or bipolar depression are permitted as long as GAD is primary
- Current use of any non-prescribed psychoactive medications or drugs (aside from medications for treatment of GAD)
- Contraindication to enter the MRI environment
- Pregnancy (or suspected/possible pregnancy or plan to become pregnant in the short-term)
- Inability to adhere to treatment schedule
- Initiation of new anxiolytic treatment at the time of study randomization
Where
- Los Angeles, California
- Boston, Massachusetts
- Charleston, South Carolina
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Feb 10, 2026 · Source of record for eligibility and locations