Question

In the Glee 'Vitamin D' episode, who admits to the second performers that the first mash-up was performed on some sort of drug?

Answer 1

In the Glee episode "Vitamin D", it is Puck who admits to the second performers that the first mash-up was performed on some sort of drug. He confesses that the group had taken "vitamin D" (Adderall) before their performance.

Answer 2

Will Schuester confesses to Shelby Corcoran and Rachel Berry that the first mash-up was performed on pseudoephedrine, a common cold medication. He explains that he gave it to the students to help them focus and stay alert during the competition. Shelby and Rachel are appalled at this revelation.