Nanobots can be mind controlled to release drugs into a living organism

https://www.newscientist.com/article/2102463-mind-controlled-nanobots-could-release-drugs-inside-your-brain/

This article in New Scientist describes research by scientists in Israel involving nano bots which were injected into cockroaches attached to an electromagnetic coil. The bots contained drugs, and had a gate which when heated released the drug. A man wearing an EEG cap attached to the coils, switched on the coils by either doing a mental calculation or having his brain at rest.

The idea is to apply this to human brains.