I would have linked it but my phone is being slow... He did an experiment with a bunch of people and intramuscular injections and then recorded their really similar trips
There is an interesting blurb by the author and director Rick Strassman M.D. and its interesting to read how a scientific mind changes his perceptions over the course of the experiment. 5 years, 5-600 doses for 60 people. Wish I could have participated!!