Title shortened to fit 80 char.
There are a few clinical trials underway [1]
Before anyone gets any ideas, OTC this stuff is often mixed with acetaminophen which is can be very bad for the liver, and DMX itself may have adverse impacts on the kidneys. Don't go gulping this stuff down.
But if the trials pan out it would be incredible to have a rapid efficacy drug along the lines of ketamine that is safe enough that it's put in OTC meds. Ketamine unfortunately has both a stigma and lower safety profile.