Per 
The molecular structure of SCP-XXXX. See Dr. Brenda █████████ for the uncensored image.
Wake up.
Item #: SCP-XXXX
You're living a lie.
Object Class: Safe
The world around you may seem authentic.
Special Containment Procedures: One beaker containing a 100 milliliters of SCP-XXXX is to be kept in a Level 1 storage locker at Site-76. Access to SCP-XXXX is given to personnel with Security Clearance Level 3. Testing using SCP-XXXX is strictly forbidden by the Ethics Committee per Ethics Conduct 14A "Abuse of E-class personnel or sapient anomalies". Testing may be permitted with at least 4 votes from the O5 council.
It's not. It's an illusion.
Description: SCP-XXXX is a chemical compound that activates in when administered to the human body with high levels of adrenaline, cortisol and Adrenocorticotropic hormone1. If SCP-XXXX is administered without the presence of the aforementioned hormones, the compound will stay inert in the bloodstream. It is highly likely that SCP-XXXX can remain in the human body for up to 20 years or more without affecting itself or the host.
Your illusion.
Due to unknown reasons, SCP-XXXX will only activate when organic versions of the hormones are created. It is also unresponsive towards hormones of other individuals other than the host's. As the required hormones should be in high quantities, SCP-XXXX will only activate when the host is put under extreme pain.
You are Jonah Mill of the the 5th Marine Regiment, US armed forces.
Because of these circumstances, the Ethics Committee severely objected to testing of SCP-XXXX. After a meeting between the O5 council members, O5-6 suggested to test SCP-XXXX on "someone that truly deserved it" [Sic]. D-4910 was selected for testing by the Ethics Committee for his crimes that involved the torture and mutilation of 2 prepubescent children, which put him on death row and subsequently into the D-Class selection program.
After being captured by enemy soldiers in Iraq, you were put under extensive torture.
Once SCP-XXXX activates in the host's body, the host will go into a comatose state. They will perceive the human life from scratch in their coma, such as being born again, with no memory of their former life. Touch and smell are felt by the host while in the coma, although this is not possible.
Then he came.
During the time they stay in the coma, the host will occasionally spot text or hear sounds that tell them to wake up [Sic]. These texts/voices will tell the host to commit suicide to wake from their coma. The texts/voices will also say that if they continue living in their life in the coma and subsequently expire from old age, they will become non-corporeal and be subjected to warning other hosts to wake up indefinitely.
The Ukrainian man.
Addendum.XXXX.1: Discovery and invention of SCP-XXXX
He came with the pill.
A Ukrainian scientist, Pytor Sorovitch, developed SCP-XXXX in Laboratory-██ during the 1980's Soviet Research Program. By combining the elements ████████,██████████,██████ and various inorganic and organic compounds, ███ milliliters of SCP-XXXX was created. After testing it on various inmates at the nearby prison, Pytor saw the anomalous conditions of SCP-XXXX. Soon after the report of an undercover agent, foundation operatives captured Pytor and confiscated all samples of SCP-XXXX as well as documents regarding it and amnestized all civilians with knowledge of it.
You swallowed it, hoping it would end your suffering.
Addendum.XXXX.2: Testing
But you prolonged it.
D-4910 was put under pain stimulants for 14 hours, after which the levels of required hormones in his body was sufficient. He then entered a coma and came back to consciousness 4 hours later. After being subdued, he was interviewed by Dr. Drake Ramoray. Interview log below.
You've been living a lie ever since.
Addendum.XXXX.3: Interview log
Unnatural death is the only way out. I can't stress this enough…
