Cortexiphan

Cortexiphan is a drug that is administered to child Psymancers to enhance various mental abilities.

History
Cortexiphan is administered to Psymancers in childhood to enhance various mental abilities, including the ability to notice when items or people originate from alternate universes through a telltale "shimmer".

In 150,084 CMT (Day 76 of The Mazkertis Paradox arc), SM Raito Nakamura knew that he would appear to "shimmer" to Cortexiphan recipients such as Psymancers because he originated from an alternate universe. Raito mocked Masahito because his own Psymancers could see the "shimmer", but Masahito could not.