>changing your thoughts and consciousness

This is extremely broad, in that case cigarettes are hallucinogens. Nicotine is a psychoactive substance, it absolutely alters though patterns and consciousness.

>often or ordinarily causes hallucinations, perceptual anomalies, and other substantial subjective changes in thought, emotion, and consciousness that are not typically experienced to such degrees with other drug classifications

I think you left out an important part of the stated definition, this also says "and" rather than "or". I think that "dissociative" is a more accurate classification the the compounds' primary effects seen at the majority of doses.

I mention in another comment in this thread why I think it is a poor classification, please refer to that message for my argument.