Mmmm. Drawing 6 is indicative of his peak.....Only 2 hours and 45 minutes into it!
They should have given him a higher dose. That's like going to the fair and not being able to ride the rides......Must have only gave him enough for observation purposes. Mean.
(not that I encourage the use of LSD in any way)

It would be weird to take LSD and have a doctor staring at you the whole time.
Talk about No fun. Hey doctor you are a buzz and spiritual kill...Why don't you just leave if you can't hang......
Oh well....he clearly liked the doctor from the looks of the drawings...he was even nice enough to draw a younger, more attractive version of his doctor.