Varying psychedelic designs are printed out on LSD blotter paper, which is "[a sheet] of paper which [is] soaked into an LSD solution, dried, and perforated into small squares of individual dosage units" (wikipedia) of the drug. The paper is concentrated into sections around ¼ inch by ¼ inch. LSD blotters, or as more commonly known “hits,” are just another way for underground artists to express themselves. As you can see by these examples, they sure did.
Side effects of using the drug are extensive and can be found here. Stay away from this toxic chemical, but do enjoy the art printed on it!
Here are some examples of blotters showing various designs and art works. Some are entire sheets, while others are only a few strips.
Felix the Cat

Multiple prints of the black and white cat, just in case you need help getting lost in the illusion.
The Beavis & Butthead Psychedelic Experience

Now you can tell your parents your uncontrollable laughter is just from your impression of these Beavis and Butthead stickers. See if you can find the T.P. while glaring at the idiotic brothers.
Campbell's LSD Blotter

Let this piece of Andy Warhol art be your muse as you paint and feel the colors.
Albert Hofmann - Father of LSD

An homage to the man that started it all.
Bart Simpson - Front & Back

Mr. "Eat My Shorts" on paper.
"Blowup Doll" LSD Blotter

For all those men with this little plastic lady stuffed in their closet.
Internet Explorer

Even this won't convince a nerd into leaving his computer.
The Mad Hatter

He skips along in a world full of color.
Janis Joplin

An emotional depiction of the famous singer.
Hoffmann 100th Birthday

Hoffman hops along in his little bunny suit on a bike... what??
"Twins"

The little babies coddle each other in the womb.
Marilyn Monroe

This beauty cannot help but have her face everywhere.
Daffy Duck

- Daffy Duck: Try not to trip me up with those big feet please.
- Bugs Bunny: I'll try Daffy.
Dolphin

looks at flipper acting crazy..."How are you supposed to make a fish act that way? Crazy guys."
Scooby Doo & Shaggy

The famous duo hit the blotter paper!
Buddha

Let Buddha and "ohm" take you to Nirvana.
Fat Freddy's Cat

A cute fluffy little tail with a bad-boy cat in a hat and you can't help but laugh.
Trips:
If you decide to actually use LSD, you need to be aware of the consequences. Using this chemical substance will result in depression, agitation, and confusion. To help comfort someone that makes the terrible decision to use this drug, remind him or her that this will end shortly, and that they are not losing their minds. Consistently reassure the tripper that they are indeed okay.
For More Information:
- NIDA
- Wikipedia
- The Antidrug