Had a kid almost kicked out of my middle school for faking something similar.

During lunch one day, he crushed some sugar packets on an Oreo before giving it to another kid. Then jokingly told the kid he gave him a crushed up Ritalin covered Oreo. They all knew it was a joke since he crushed the sugar packet in front of him, but the kid hated the other guy so he told a teacher.

I think criminal charges were charged against him. The kid had to go get his stomach pumped in the chance it was actually Ritalin.

The other kid had gone to a disciplinary school for a full year before being allowed back for his 8th grade year.