Agent Rider had no wounds, which indicates the cause of his unconsciousness was the white powder on his face.
Prising open Rider's eyes, Luo An noticed his complexion was turning purple, breathing was difficult, and both pupils were noticeably constricted to pinpoint size, causing Luo An's brows to furrow tightly.
Just the bit of powder on Rider's face, rock sugar and periwinkle shell could not possibly knock him out; the only substance that could act so quickly was the fentanyl they had mentioned earlier in their conversation.
The toxicity of fentanyl is 80 times that of periwinkle shell, and if no action is taken, merely waiting to take Rider to the hospital after the operation would be too late.
"Shit."
Without hesitation, Luo An immediately took out an "Antidote Potion" from the system page.