Yet another mechanism of potentially rapid onset antidepressant action is that of the novel agents known as neuroactive steroids that have a novel action at gamma aminobutyric acid A (GABA-A) receptors that are not sensitive to benzodiazepines (as well as those that are) (Table 1 and Figure 3).1 Finally, psychedelic drugs that target serotonin receptors such as psilocybin and 3,4-methylenedioxymethamphetamine (MDMA, “ecstasy”) seem to also have rapid onset of both neurogenesis and antidepressant action.1 The list of innovations goes on and on, and also includes many novel potential indications for already approved agents (Table 2). Hopefully, these tables listing new therapeutic targets for psychiatric disorders as well as the discussion here provide the reader with a glimpse into the excitement and innovations afoot in this third generation of drug development in psychiatry.
The future of psychopharmacology is clearly going to be amazing.