Most hallucinogenics cause visual distortions and altered perceptions. Remember Lucy’s kaleidoscopic eyes? Users often misinterpret what they see (marmalade skies) or see things that aren’t really there (pink elephants). DiPT (Diisopropyltryptamine), while it can also cause visual and perceptual problems, primarily causes auditory distortion. For you guitar players out there, it can sound like a flanger or phase shifter. A wobbling or swirling of the sound.
One form of this drug, 5-Methoxy-diisopropyltryptamine, is sold on the streets as “Foxy” or “Foxy Methoxy.” In addition to auditory distortions, it can also cause euphoria, hypersexuality, emotional lability, hyperactivity, anxiety, and even out-of-body experiences.
Sounds like a Van Halen or ZZ Top concert to me.
I know all you creators of fictional villains out there are constantly looking for ways your bad guys can cause harm and aggravation to other characters. Employing this drug in your story could produce some interesting scenes.