Beats me. The only dosage forms I've seen are blotter and sugar cubes, maybe some of the blotter diffuses through the lining of your mouth if you keep it under your tongue but it also works great if you just swallow it -- it's very orally available.

Lilly though had a bad relationship with drugs, he crashed his bike when he was high on ketamine long before ketamine was fashionable.

In the early 1990s accounts of drug experiences on Erowid were mostly positive ("I smoked weed and got high and had a good time") but by the early 2000s it started to look like anti-drug propaganda but I think it was a lower quality tranche of users [1] and you started seeing negative ones ("I took a fistful of random pills, went out on the street, lost motor control and was laying flat on the ground, everybody was really sympathetic until I rolled over and a huge baggie of pills came out of my pocket, then I got kicked by a cop.")

[1] y'all know I am not inclined to believe in natural hierarchies but I think that early adopters of most things are "better" than later adopters however you define "better"