Psychiatry’s fascination with ketamine continues, despite growing evidence that it may not be the miracle treatment some once hoped for. It’s clear that ketamine is not disease-modifying, meaning patients treated for depression with ketamine can still experience relapses. Even more concerning is that ketamine’s effects are short-lived, with the average time to relapse being just 2-4 weeks.
This brings us to recent studies on oral extended-release ketamine for treatment-resistant depression (TRD). In a proof-of-concept study, twice-weekly dosing of extended-release ketamine showed statistically significant and clinically meaningful improvements in depressive symptoms. The treatment was generally well-tolerated, with a side effect profile that included reduced dissociation and sedation, though there were increases in blood pressure. Having a tablet form of ketamine could make the treatment more accessible, but it also raises concerns about potential abuse and diversion.
In my view, this is another symptom management tool for patients with TRD. However, the challenge remains that patients will likely need to continue ketamine treatment long-term without a clear dosing regimen. Nonetheless, the results were promising enough to lead to a phase-3 trial using 180 mg doses twice daily.
Link to article: https://www.nature.com/articles/s41591-024-03063-x
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