Two teaching assistants at a school in Leeds were taken to hospital after eating cannabis in "hash cakes" given to them by a 15-year-old pupil.
The schoolgirl was suspended from Wortley High School after she took the cakes to school on 10 September.
A spokesman for Leeds City Council said the girl had since been moved to a different school. No police action was taken over the matter.
Leeds City Council said neither staff members made formal complaints.
The council spokesman added: "Wortley High School does not condone drugs and was disappointed this incident took place.
"The school works hard to educate its pupils about the dangers and implications of drug abuse and will not tolerate any behaviour of this kind."