producing or creating delirium
• (a.) Producing, or tending to produce, delirium. • (n.) Any substance which tends to cause delirium.
De·lir`i·fa'cient adjective [ Delirium + Latin faciens , -entis , present participle of facere to make.] (Medicine) Producing, or tending to produce, delirium. -- noun Any substance which tends to cause delirium. 
delirifacient 1. Producing, or tending to produce, delirium. 2. Any substance which tends to cause delirium.