Per 
image captured via invasive neural mapping of intoxicated D-Class
Item #: SCP-5813
Object Class: Euclid
Special Containment Procedures: Any personnel showing symptoms associated with SCP-5813 must be immediately administered with an infusion of acetylcholine directly into the central nervous system; reccomend usage of emergency spinal taps located in standard foundation first-aid kits.
Description: SCP-5813 is a humanoid(?) semi-corpreal memetic entity, only perceptable when acetylcholine activity in affected (conscious) persons is sufficiently low. It is currently unknown if SCP-5813 exists solely within the minds of those affected, or if it does indeed maintain some sort of physical presence in reality.
Addendum:
Test A - ██/██/04
Subject: D-Class
Procedure: Subject restrained and 3-quinuclidinyl benzilate drip applied, along with intraneural electrodes to monitor subject's visual cortex, medulla oblongata and hippocampus. anaesthetics and/or additional sedatives are contraindicated for this procedure.
Results:
Analysis:
Test B - Date
Subject:
Procedure:
Results:
Analysis:
