Turns out there are numerous ‘FDA Cleared’ CES (cranial electrotherapy stimulation AC) devices available for sale in the U.S. when recommended and prescribed by your doctor. Typically these devices are recommended for pain but also for depression. They also seem to be recommended for use in drug treatment. Cost of the device is sometimes covered by insurance.
More from Fisher Wallace. [Video was removed from Youtube]
Also for doctors: How to prescribe the device.