"There is one strange side effect that some people experience, though, and it can make you feel a little bit uneasy. New vapers describe it as a “brain fog” and say that they feel a little bit lightheaded and almost like they can’t concentrate on something for too long when they have it."
https://aspenvalleyvapes.com/why-am-i-experiencing-brain-fog-when-i-vape-and-how-can-i-prevent-it/
https://aspenvalleyvapes.com/why-am-i-experiencing-brain-fog-when-i-vape-and-how-can-i-prevent-it/