Did the phase 2 ketamine trial find main results for tinnitus?
A phase 2 clinical trial investigating ketamine for tinnitus has finished enrollment. However, the primary results for this specific study have not been published or reported yet. The trial tested whether injecting ketamine into the inner ear could reduce symptoms like ringing in the ears. Ketamine works by blocking NMDA receptors and increasing GABA levels in the brain, which are thought to play a role in tinnitus maintenance.
What the research says
The trial status is listed as completed, but the specific main results are currently unavailable in the provided records. This means the data on whether ketamine effectively treated tinnitus in this group of 42 adults has not been shared publicly yet 4.
While this specific ketamine trial awaits results, other research has explored different treatments for tinnitus. For example, a phase 2 study on a drug called AM-101 found that it did not improve the primary measure of tinnitus loudness overall. However, it did show some benefit for patients whose tinnitus started after noise trauma or ear infections 5.
Scientists are also studying the genetic and biological causes of tinnitus. Recent findings suggest that rare mutations in the PRKRA gene are linked to tinnitus and mild cognitive impairment. Other studies have identified that high levels of a protein called ACADVL in the blood may be associated with the condition 12.
Researchers are using advanced brain imaging tools like fMRI to understand how tinnitus changes brain activity. These scans can show how the brain reorganizes itself in response to chronic ringing and help predict how a patient might respond to treatment 3.
What to ask your doctor
- Have the main results from the phase 2 ketamine trial for tinnitus been published yet?
- Is ketamine injection into the inner ear an option for my specific type of tinnitus?
- What are the potential risks of using ketamine for tinnitus compared to other treatments?
- Are there clinical trials for tinnitus currently accepting new patients in my area?
This question is drawn from common patient questions about Psychiatry and answered using cited medical research. We do not provide individualized advice.