> When the patients received ketamine, their depression symptoms significantly improved within 40 minutes, and remained improved over 3 days. Overall, 79% of th

> When the patients received ketamine, their depression symptoms significantly improved within 40 minutes, and remained improved over 3 days. Overall, 79% of the patients improved with ketamine, but 0% reported improvement when they received placebo. So they only checked up on them for three days. Bipolar depression is generally chronically recurring. Sufferers will feel "better" for a short period of time, and then slip back into depressive mind-states. This would be much more interesting if it was a longer-reaching study.