LSD is a powder/crystal (a salt). People just don't consume opioids orally, usually. There's something similar though: skin patches, since (other than LSD) fentanyl can be absorbed through the skin.

In context, we're talking about pills cut with fentanyl, in which case it is often consumed orally, mixed in at a very small concentration compared to the other ingredients.

Powedered drugs like cocaine mixed with fentanyl are even more horrible, since there is absolutely nothing to keep the concentration of fentanyl homogeneous throughout as it is handled.

Blotters.