DO NOT DO THIS BECAUSE THIS IS POTENTIALLY LIFE THREATENING.
This is for informational purposes only.
The toad's primary defense system are glands that produce a poison that may be potent enough to kill a grown dog. These parotoid glands also produce the 5-MeO-DMT  and bufotenin for which the toad is known; both of these chemicals belong to the family of hallucinogenic tryptamines. The presence of these substances in the skin and poison of the toad produces psychoactive effects when smoked.
Note some author consider this to be a separate genus. More taxonomic investigation is required.
Not active but contains irritating toxins
http://www.erowid.org/animals/phyllomedusa/phyllomedusa.shtml Phyllomedusa bicolor
(containing semi-psychedelic-opioid peptides)